Release 4.17 fs/proc/base.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  linux/fs/proc/base.c
 *
 *  Copyright (C) 1991, 1992 Linus Torvalds
 *
 *  proc base directory handling functions
 *
 *  1999, Al Viro. Rewritten. Now it covers the whole per-process part.
 *  Instead of using magical inumbers to determine the kind of object
 *  we allocate and fill in-core inodes upon lookup. They don't even
 *  go into icache. We cache the reference to task_struct upon lookup too.
 *  Eventually it should become a filesystem in its own. We don't use the
 *  rest of procfs anymore.
 *
 *
 *  Changelog:
 *  17-Jan-2005
 *  Allan Bezerra
 *  Bruna Moreira <bruna.moreira@indt.org.br>
 *  Edjard Mota <edjard.mota@indt.org.br>
 *  Ilias Biris <ilias.biris@indt.org.br>
 *  Mauricio Lin <mauricio.lin@indt.org.br>
 *
 *  Embedded Linux Lab - 10LE Instituto Nokia de Tecnologia - INdT
 *
 *  A new process specific entry (smaps) included in /proc. It shows the
 *  size of rss for each memory area. The maps entry lacks information
 *  about physical memory size (rss) for each mapped file, i.e.,
 *  rss information for executables and library files.
 *  This additional information is useful for any tools that need to know
 *  about physical memory consumption for a process specific library.
 *
 *  Changelog:
 *  21-Feb-2005
 *  Embedded Linux Lab - 10LE Instituto Nokia de Tecnologia - INdT
 *  Pud inclusion in the page table walking.
 *
 *  ChangeLog:
 *  10-Mar-2005
 *  10LE Instituto Nokia de Tecnologia - INdT:
 *  A better way to walks through the page table as suggested by Hugh Dickins.
 *
 *  Simo Piiroinen <simo.piiroinen@nokia.com>:
 *  Smaps information related to shared, private, clean and dirty pages.
 *
 *  Paul Mundt <paul.mundt@nokia.com>:
 *  Overall revision about smaps.
 */

#include <linux/uaccess.h>

#include <linux/errno.h>
#include <linux/time.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/task_io_accounting_ops.h>
#include <linux/init.h>
#include <linux/capability.h>
#include <linux/file.h>
#include <linux/fdtable.h>
#include <linux/string.h>
#include <linux/seq_file.h>
#include <linux/namei.h>
#include <linux/mnt_namespace.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/rcupdate.h>
#include <linux/kallsyms.h>
#include <linux/stacktrace.h>
#include <linux/resource.h>
#include <linux/module.h>
#include <linux/mount.h>
#include <linux/security.h>
#include <linux/ptrace.h>
#include <linux/tracehook.h>
#include <linux/printk.h>
#include <linux/cache.h>
#include <linux/cgroup.h>
#include <linux/cpuset.h>
#include <linux/audit.h>
#include <linux/poll.h>
#include <linux/nsproxy.h>
#include <linux/oom.h>
#include <linux/elf.h>
#include <linux/pid_namespace.h>
#include <linux/user_namespace.h>
#include <linux/fs_struct.h>
#include <linux/slab.h>
#include <linux/sched/autogroup.h>
#include <linux/sched/mm.h>
#include <linux/sched/coredump.h>
#include <linux/sched/debug.h>
#include <linux/sched/stat.h>
#include <linux/flex_array.h>
#include <linux/posix-timers.h>
#include <trace/events/oom.h>
#include "internal.h"
#include "fd.h"

#include "../../lib/kstrtox.h"

/* NOTE:
 *      Implementing inode permission operations in /proc is almost
 *      certainly an error.  Permission checks need to happen during
 *      each system call not at open time.  The reason is that most of
 *      what we wish to check for permissions in /proc varies at runtime.
 *
 *      The classic example of a problem is opening file descriptors
 *      in /proc for a task before it execs a suid executable.
 */


static u8 nlink_tid __ro_after_init;

static u8 nlink_tgid __ro_after_init;


struct pid_entry {
	
const char *name;
	
unsigned int len;
	
umode_t mode;
	
const struct inode_operations *iop;
	
const struct file_operations *fop;
	
union proc_op op;
};


#define NOD(NAME, MODE, IOP, FOP, OP) {                       \
        .name = (NAME),                                 \
        .len  = sizeof(NAME) - 1,                       \
        .mode = MODE,                                   \
        .iop  = IOP,                                    \
        .fop  = FOP,                                    \
        .op   = OP,                                     \
}


#define DIR(NAME, MODE, iops, fops)	\
	NOD(NAME, (S_IFDIR|(MODE)), &iops, &fops, {} )

#define LNK(NAME, get_link)					\
	NOD(NAME, (S_IFLNK|S_IRWXUGO),                          \
                &proc_pid_link_inode_operations, NULL,          \
                { .proc_get_link = get_link } )

#define REG(NAME, MODE, fops)				\
	NOD(NAME, (S_IFREG|(MODE)), NULL, &fops, {})

#define ONE(NAME, MODE, show)				\
	NOD(NAME, (S_IFREG|(MODE)),                     \
                NULL, &proc_single_file_operations,     \
                { .proc_show = show } )

/*
 * Count the number of hardlinks for the pid_entry table, excluding the .
 * and .. links.
 */


static unsigned int __init pid_entry_nlink(const struct pid_entry *entries,
	unsigned int n)
{
	unsigned int i;
	unsigned int count;

	count = 2;
	for (i = 0; i < n; ++i) {
		if (S_ISDIR(entries[i].mode))
			++count;
	}

	return count;
}

Contributors
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CommitProp
Vegard Nossum
60
95.24%
1
50.00%
Alexey Dobriyan
3
4.76%
1
50.00%
Total
63
100.00%
2
100.00%



static int get_task_root(struct task_struct *task, struct path *root)
{
	int result = -ENOENT;

	task_lock(task);
	if (task->fs) {
		get_fs_root(task->fs, root);
		result = 0;
	}
	task_unlock(task);
	return result;
}

Contributors
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Tokens
Prop
Commits
CommitProp
Hugh Dickins
23
41.07%
1
25.00%
Eric W. Biedermann
20
35.71%
1
25.00%
Albert D. Cahalan
7
12.50%
1
25.00%
Miklos Szeredi
6
10.71%
1
25.00%
Total
56
100.00%
4
100.00%



static int proc_cwd_link(struct dentry *dentry, struct path *path)
{
	struct task_struct *task = get_proc_task(d_inode(dentry));
	int result = -ENOENT;

	if (task) {
		task_lock(task);
		if (task->fs) {
			get_fs_pwd(task->fs, path);
			result = 0;
		}
		task_unlock(task);
		put_task_struct(task);
	}
	return result;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
39
48.75%
1
14.29%
Miklos Szeredi
24
30.00%
1
14.29%
Albert D. Cahalan
6
7.50%
1
14.29%
David Howells
3
3.75%
1
14.29%
Hugh Dickins
3
3.75%
1
14.29%
Cyrill V. Gorcunov
3
3.75%
1
14.29%
Jan Blunck
2
2.50%
1
14.29%
Total
80
100.00%
7
100.00%



static int proc_root_link(struct dentry *dentry, struct path *path)
{
	struct task_struct *task = get_proc_task(d_inode(dentry));
	int result = -ENOENT;

	if (task) {
		result = get_task_root(task, path);
		put_task_struct(task);
	}
	return result;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
39
67.24%
1
12.50%
Albert D. Cahalan
5
8.62%
1
12.50%
Cyrill V. Gorcunov
3
5.17%
1
12.50%
Hugh Dickins
3
5.17%
1
12.50%
David Howells
3
5.17%
1
12.50%
Chuck Lever
2
3.45%
1
12.50%
Jan Blunck
2
3.45%
1
12.50%
Miklos Szeredi
1
1.72%
1
12.50%
Total
58
100.00%
8
100.00%



static ssize_t proc_pid_cmdline_read(struct file *file, char __user *buf,
				     size_t _count, loff_t *pos)
{
	struct task_struct *tsk;
	struct mm_struct *mm;
	char *page;
	unsigned long count = _count;
	unsigned long arg_start, arg_end, env_start, env_end;
	unsigned long len1, len2, len;
	unsigned long p;
	char c;
	ssize_t rv;

	BUG_ON(*pos < 0);

	tsk = get_proc_task(file_inode(file));
	if (!tsk)
		return -ESRCH;
	mm = get_task_mm(tsk);
	put_task_struct(tsk);
	if (!mm)
		return 0;
	/* Check if process spawned far enough to have cmdline. */
	if (!mm->env_end) {
		rv = 0;
		goto out_mmput;
	}

	page = (char *)__get_free_page(GFP_KERNEL);
	if (!page) {
		rv = -ENOMEM;
		goto out_mmput;
	}

	down_read(&mm->mmap_sem);
	arg_start = mm->arg_start;
	arg_end = mm->arg_end;
	env_start = mm->env_start;
	env_end = mm->env_end;
	up_read(&mm->mmap_sem);

	BUG_ON(arg_start > arg_end);
	BUG_ON(env_start > env_end);

	len1 = arg_end - arg_start;
	len2 = env_end - env_start;

	/* Empty ARGV. */
	if (len1 == 0) {
		rv = 0;
		goto out_free_page;
	}
	/*
         * Inherently racy -- command line shares address space
         * with code and data.
         */
	rv = access_remote_vm(mm, arg_end - 1, &c, 1, FOLL_ANON);
	if (rv <= 0)
		goto out_free_page;

	rv = 0;

	if (c == '\0') {
		/* Command line (set of strings) occupies whole ARGV. */
		if (len1 <= *pos)
			goto out_free_page;

		p = arg_start + *pos;
		len = len1 - *pos;
		while (count > 0 && len > 0) {
			unsigned int _count;
			int nr_read;

			_count = min3(count, len, PAGE_SIZE);
			nr_read = access_remote_vm(mm, p, page, _count, FOLL_ANON);
			if (nr_read < 0)
				rv = nr_read;
			if (nr_read <= 0)
				goto out_free_page;

			if (copy_to_user(buf, page, nr_read)) {
				rv = -EFAULT;
				goto out_free_page;
			}

			p	+= nr_read;
			len	-= nr_read;
			buf	+= nr_read;
			count	-= nr_read;
			rv	+= nr_read;
		}
	} else {
		/*
                 * Command line (1 string) occupies ARGV and
                 * extends into ENVP.
                 */
		
struct {
			
unsigned long p;
			
unsigned long len;
		} cmdline[2] = {
			{ .p = arg_start, .len = len1 },
			{ .p = env_start, .len = len2 },
                };
		loff_t pos1 = *pos;
		unsigned int i;

		i = 0;
		while (i < 2 && pos1 >= cmdline[i].len) {
			pos1 -= cmdline[i].len;
			i++;
		}
		while (i < 2) {
			p = cmdline[i].p + pos1;
			len = cmdline[i].len - pos1;
			while (count > 0 && len > 0) {
				unsigned int _count, l;
				int nr_read;
				bool final;

				_count = min3(count, len, PAGE_SIZE);
				nr_read = access_remote_vm(mm, p, page, _count, FOLL_ANON);
				if (nr_read < 0)
					rv = nr_read;
				if (nr_read <= 0)
					goto out_free_page;

				/*
                                 * Command line can be shorter than whole ARGV
                                 * even if last "marker" byte says it is not.
                                 */
				final = false;
				l = strnlen(page, nr_read);
				if (l < nr_read) {
					nr_read = l;
					final = true;
				}

				if (copy_to_user(buf, page, nr_read)) {
					rv = -EFAULT;
					goto out_free_page;
				}

				p	+= nr_read;
				len	-= nr_read;
				buf	+= nr_read;
				count	-= nr_read;
				rv	+= nr_read;

				if (final)
					goto out_free_page;
			}

			/* Only first chunk can be read partially. */
			pos1 = 0;
			i++;
		}
	}

out_free_page:
	free_page((unsigned long)page);
out_mmput:
	mmput(mm);
	if (rv > 0)
		*pos += rv;
	return rv;
}

Contributors
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Alexey Dobriyan
701
97.50%
4
44.44%
Eric W. Biedermann
10
1.39%
1
11.11%
Willy Tarreau
3
0.42%
1
11.11%
Al Viro
3
0.42%
1
11.11%
Michal Hocko
1
0.14%
1
11.11%
Andrea Arcangeli
1
0.14%
1
11.11%
Total
719
100.00%
9
100.00%


static const struct file_operations proc_pid_cmdline_ops = {
	.read	= proc_pid_cmdline_read,
	.llseek	= generic_file_llseek,
};

#ifdef CONFIG_KALLSYMS
/*
 * Provides a wchan file via kallsyms in a proper one-value-per-file format.
 * Returns the resolved symbol.  If that fails, simply return the address.
 */


static int proc_pid_wchan(struct seq_file *m, struct pid_namespace *ns,
			  struct pid *pid, struct task_struct *task)
{
	unsigned long wchan;
	char symname[KSYM_NAME_LEN];

	if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
		goto print0;

	wchan = get_wchan(task);
	if (wchan && !lookup_symbol_name(wchan, symname)) {
		seq_puts(m, symname);
		return 0;
	}

print0:
	seq_putc(m, '0');
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Alexey Dobriyan
41
44.57%
4
30.77%
Eric W. Biedermann
23
25.00%
1
7.69%
Ingo Molnar
9
9.78%
1
7.69%
Joe Perches
4
4.35%
1
7.69%
Andrew Morton
3
3.26%
1
7.69%
Albert D. Cahalan
3
3.26%
1
7.69%
Eric Paris
3
3.26%
1
7.69%
Michael LeMay
3
3.26%
1
7.69%
Robin Humble
2
2.17%
1
7.69%
Jake Edge
1
1.09%
1
7.69%
Total
92
100.00%
13
100.00%

#endif /* CONFIG_KALLSYMS */



static int lock_trace(struct task_struct *task)
{
	int err = mutex_lock_killable(&task->signal->cred_guard_mutex);
	if (err)
		return err;
	if (!ptrace_may_access(task, PTRACE_MODE_ATTACH_FSCREDS)) {
		mutex_unlock(&task->signal->cred_guard_mutex);
		return -EPERM;
	}
	return 0;
}

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Al Viro
59
98.33%
1
50.00%
Jann Horn
1
1.67%
1
50.00%
Total
60
100.00%
2
100.00%



static void unlock_trace(struct task_struct *task)
{
	mutex_unlock(&task->signal->cred_guard_mutex);
}

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Al Viro
21
100.00%
1
100.00%
Total
21
100.00%
1
100.00%

#ifdef CONFIG_STACKTRACE


#define MAX_STACK_TRACE_DEPTH	64



static int proc_pid_stack(struct seq_file *m, struct pid_namespace *ns,
			  struct pid *pid, struct task_struct *task)
{
	struct stack_trace trace;
	unsigned long *entries;
	int err;
	int i;

	entries = kmalloc(MAX_STACK_TRACE_DEPTH * sizeof(*entries), GFP_KERNEL);
	if (!entries)
		return -ENOMEM;

	trace.nr_entries	= 0;
	trace.max_entries	= MAX_STACK_TRACE_DEPTH;
	trace.entries		= entries;
	trace.skip		= 0;

	err = lock_trace(task);
	if (!err) {
		save_stack_trace_tsk(task, &trace);

		for (i = 0; i < trace.nr_entries; i++) {
			seq_printf(m, "[<0>] %pB\n", (void *)entries[i]);
		}
		unlock_trace(task);
	}
	kfree(entries);

	return err;
}
Contributors
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CommitProp
Ken Chen
133
84.71%
1
33.33%
Al Viro
23
14.65%
1
33.33%
Linus Torvalds
1
0.64%
1
33.33%
Total
157
100.00%
3
100.00%

#endif

#ifdef CONFIG_SCHED_INFO
/*
 * Provides /proc/PID/schedstat
 */


static int proc_pid_schedstat(struct seq_file *m, struct pid_namespace *ns,
			      struct pid *pid, struct task_struct *task)
{
	if (unlikely(!sched_info_on()))
		seq_printf(m, "0 0 0\n");
	else
		seq_printf(m, "%llu %llu %lu\n",
		   (unsigned long long)task->se.sum_exec_runtime,
		   (unsigned long long)task->sched_info.run_delay,
		   task->sched_info.pcount);

	return 0;
}
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Eric W. Biedermann
23
28.40%
1
8.33%
Naveen N. Rao
17
20.99%
1
8.33%
Alexey Dobriyan
17
20.99%
1
8.33%
Ingo Molnar
11
13.58%
2
16.67%
Linus Torvalds (pre-git)
7
8.64%
4
33.33%
Joe Perches
3
3.70%
1
8.33%
Ken Chen
2
2.47%
1
8.33%
Balbir Singh
1
1.23%
1
8.33%
Total
81
100.00%
12
100.00%

#endif

#ifdef CONFIG_LATENCYTOP


static int lstats_show_proc(struct seq_file *m, void *v)
{
	int i;
	struct inode *inode = m->private;
	struct task_struct *task = get_proc_task(inode);

	if (!task)
		return -ESRCH;
	seq_puts(m, "Latency Top version : v0.1\n");
	for (i = 0; i < 32; i++) {
		struct latency_record *lr = &task->latency_record[i];
		if (lr->backtrace[0]) {
			int q;
			seq_printf(m, "%i %li %li",
				   lr->count, lr->time, lr->max);
			for (q = 0; q < LT_BACKTRACEDEPTH; q++) {
				unsigned long bt = lr->backtrace[q];
				if (!bt)
					break;
				if (bt == ULONG_MAX)
					break;
				seq_printf(m, " %ps", (void *)bt);
			}
			seq_putc(m, '\n');
		}

	}
	put_task_struct(task);
	return 0;
}

Contributors
Person
Tokens
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CommitProp
Arjan van de Ven
122
67.40%
1
25.00%
Joe Perches
31
17.13%
1
25.00%
Hiroshi Shimamoto
26
14.36%
1
25.00%
Alexey Dobriyan
2
1.10%
1
25.00%
Total
181
100.00%
4
100.00%



static int lstats_open(struct inode *inode, struct file *file)
{
	return single_open(file, lstats_show_proc, inode);
}

Contributors
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Tokens
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Arjan van de Ven
21
80.77%
1
33.33%
Hiroshi Shimamoto
5
19.23%
2
66.67%
Total
26
100.00%
3
100.00%



static ssize_t lstats_write(struct file *file, const char __user *buf,
			    size_t count, loff_t *offs)
{
	struct task_struct *task = get_proc_task(file_inode(file));

	if (!task)
		return -ESRCH;
	clear_all_latency_tracing(task);
	put_task_struct(task);

	return count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Arjan van de Ven
37
62.71%
1
33.33%
Hiroshi Shimamoto
19
32.20%
1
33.33%
Al Viro
3
5.08%
1
33.33%
Total
59
100.00%
3
100.00%


static const struct file_operations proc_lstats_operations = {
	.open		= lstats_open,
	.read		= seq_read,
	.write		= lstats_write,
	.llseek		= seq_lseek,
	.release	= single_release,
};

#endif



static int proc_oom_score(struct seq_file *m, struct pid_namespace *ns,
			  struct pid *pid, struct task_struct *task)
{
	unsigned long totalpages = totalram_pages + total_swap_pages;
	unsigned long points = 0;

	points = oom_badness(task, NULL, NULL, totalpages) *
					1000 / totalpages;
	seq_printf(m, "%lu\n", points);

	return 0;
}

Contributors
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Eric W. Biedermann
27
39.13%
1
11.11%
Alexey Dobriyan
17
24.64%
1
11.11%
David Rientjes
14
20.29%
2
22.22%
Motohiro Kosaki
4
5.80%
1
11.11%
Joe Perches
3
4.35%
1
11.11%
Al Viro
2
2.90%
2
22.22%
Oleg Nesterov
2
2.90%
1
11.11%
Total
69
100.00%
9
100.00%


struct limit_names {
	
const char *name;
	
const char *unit;
};


static const struct limit_names lnames[RLIM_NLIMITS] = {
	[RLIMIT_CPU] = {"Max cpu time", "seconds"},
	[RLIMIT_FSIZE] = {"Max file size", "bytes"},
	[RLIMIT_DATA] = {"Max data size", "bytes"},
	[RLIMIT_STACK] = {"Max stack size", "bytes"},
	[RLIMIT_CORE] = {"Max core file size", "bytes"},
	[RLIMIT_RSS] = {"Max resident set", "bytes"},
	[RLIMIT_NPROC] = {"Max processes", "processes"},
	[RLIMIT_NOFILE] = {"Max open files", "files"},
	[RLIMIT_MEMLOCK] = {"Max locked memory", "bytes"},
	[RLIMIT_AS] = {"Max address space", "bytes"},
	[RLIMIT_LOCKS] = {"Max file locks", "locks"},
	[RLIMIT_SIGPENDING] = {"Max pending signals", "signals"},
	[RLIMIT_MSGQUEUE] = {"Max msgqueue size", "bytes"},
	[RLIMIT_NICE] = {"Max nice priority", NULL},
	[RLIMIT_RTPRIO] = {"Max realtime priority", NULL},
	[RLIMIT_RTTIME] = {"Max realtime timeout", "us"},
};

/* Display limits for a process */


static int proc_pid_limits(struct seq_file *m, struct pid_namespace *ns,
			   struct pid *pid, struct task_struct *task)
{
	unsigned int i;
	unsigned long flags;

	struct rlimit rlim[RLIM_NLIMITS];

	if (!lock_task_sighand(task, &flags))
		return 0;
	memcpy(rlim, task->signal->rlim, sizeof(struct rlimit) * RLIM_NLIMITS);
	unlock_task_sighand(task, &flags);

	/*
         * print the file header
         */
       seq_printf(m, "%-25s %-20s %-20s %-10s\n",
		  "Limit", "Soft Limit", "Hard Limit", "Units");

	for (i = 0; i < RLIM_NLIMITS; i++) {
		if (rlim[i].rlim_cur == RLIM_INFINITY)
			seq_printf(m, "%-25s %-20s ",
				   lnames[i].name, "unlimited");
		else
			seq_printf(m, "%-25s %-20lu ",
				   lnames[i].name, rlim[i].rlim_cur);

		if (rlim[i].rlim_max == RLIM_INFINITY)
			seq_printf(m, "%-20s ", "unlimited");
		else
			seq_printf(m, "%-20lu ", rlim[i].rlim_max);

		if (lnames[i].unit)
			seq_printf(m, "%-10s\n", lnames[i].unit);
		else
			seq_putc(m, '\n');
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Neil Horman
200
86.58%
1
50.00%
Alexey Dobriyan
31
13.42%
1
50.00%
Total
231
100.00%
2
100.00%

#ifdef CONFIG_HAVE_ARCH_TRACEHOOK


static int proc_pid_syscall(struct seq_file *m, struct pid_namespace *ns,
			    struct pid *pid, struct task_struct *task)
{
	long nr;
	unsigned long args[6], sp, pc;
	int res;

	res = lock_trace(task);
	if (res)
		return res;

	if (task_current_syscall(task, &nr, args, 6, &sp, &pc))
		seq_puts(m, "running\n");
	else if (nr < 0)
		seq_printf(m, "%ld 0x%lx 0x%lx\n", nr, sp, pc);
	else
		seq_printf(m,
		       "%ld 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx\n",
		       nr,
		       args[0], args[1], args[2], args[3], args[4], args[5],
		       sp, pc);
	unlock_trace(task);

	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Roland McGrath
106
67.95%
1
25.00%
Al Viro
24
15.38%
1
25.00%
Alexey Dobriyan
21
13.46%
1
25.00%
Joe Perches
5
3.21%
1
25.00%
Total
156
100.00%
4
100.00%

#endif /* CONFIG_HAVE_ARCH_TRACEHOOK */

/************************************************************************/
/*                       Here the fs part begins                        */
/************************************************************************/

/* permission checks */


static int proc_fd_access_allowed(struct inode *inode)
{
	struct task_struct *task;
	int allowed = 0;
	/* Allow access to a task's file descriptors if it is us or we
         * may use ptrace attach to the process and find out that
         * information.
         */
	task = get_proc_task(inode);
	if (task) {
		allowed = ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS);
		put_task_struct(task);
	}
	return allowed;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
34
65.38%
2
25.00%
Al Viro
14
26.92%
3
37.50%
Stephen D. Smalley
2
3.85%
1
12.50%
Linus Torvalds (pre-git)
1
1.92%
1
12.50%
Jann Horn
1
1.92%
1
12.50%
Total
52
100.00%
8
100.00%



int proc_setattr(struct dentry *dentry, struct iattr *attr)
{
	int error;
	struct inode *inode = d_inode(dentry);

	if (attr->ia_valid & ATTR_MODE)
		return -EPERM;

	error = setattr_prepare(dentry, attr);
	if (error)
		return error;

	setattr_copy(inode, attr);
	mark_inode_dirty(inode);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
36
50.70%
1
12.50%
Christoph Hellwig
19
26.76%
1
12.50%
Al Viro
9
12.68%
2
25.00%
David Howells
3
4.23%
1
12.50%
Jan Kara
2
2.82%
1
12.50%
Linus Torvalds (pre-git)
1
1.41%
1
12.50%
Dipankar Sarma
1
1.41%
1
12.50%
Total
71
100.00%
8
100.00%

/*
 * May current process learn task's sched/cmdline info (for hide_pid_min=1)
 * or euid/egid (for hide_pid_min=2)?
 */


static bool has_pid_permissions(struct pid_namespace *pid,
				 struct task_struct *task,
				 int hide_pid_min)
{
	if (pid->hide_pid < hide_pid_min)
		return true;
	if (in_group_p(pid->pid_gid))
		return true;
	return ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS);
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Vasiliy Kulikov
49
98.00%
1
50.00%
Jann Horn
1
2.00%
1
50.00%
Total
50
100.00%
2
100.00%



static int proc_pid_permission(struct inode *inode, int mask)
{
	struct pid_namespace *pid = inode->i_sb->s_fs_info;
	struct task_struct *task;
	bool has_perms;

	task = get_proc_task(inode);
	if (!task)
		return -ESRCH;
	has_perms = has_pid_permissions(pid, task, HIDEPID_NO_ACCESS);
	put_task_struct(task);

	if (!has_perms) {
		if (pid->hide_pid == HIDEPID_INVISIBLE) {
			/*
                         * Let's make getdents(), stat(), and open()
                         * consistent with each other.  If a process
                         * may not stat() a file, it shouldn't be seen
                         * in procfs at all.
                         */
			return -ENOENT;
		}

		return -EPERM;
	}
	return generic_permission(inode, mask);
}



Contributors
Person
Tokens
Prop
Commits
CommitProp
Vasiliy Kulikov
88
88.89%
1
33.33%
Xiaotian Feng
9
9.09%
1
33.33%
Lafcadio Wluiki
2
2.02%
1
33.33%
Total
99
100.00%
3
100.00%


static const struct inode_operations proc_def_inode_operations = {
	.setattr	= proc_setattr,
};



static int proc_single_show(struct seq_file *m, void *v)
{
	struct inode *inode = m->private;
	struct pid_namespace *ns;
	struct pid *pid;
	struct task_struct *task;
	int ret;

	ns = inode->i_sb->s_fs_info;
	pid = proc_pid(inode);
	task = get_pid_task(pid, PIDTYPE_PID);
	if (!task)
		return -ESRCH;

	ret = PROC_I(inode)->op.proc_show(m, ns, pid, task);

	put_task_struct(task);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
103
100.00%
1
100.00%
Total
103
100.00%
1
100.00%



static int proc_single_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, proc_single_show, inode);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
24
92.31%
1
50.00%
Jovi Zhang
2
7.69%
1
50.00%
Total
26
100.00%
2
100.00%


static const struct file_operations proc_single_file_operations = {
	.open		= proc_single_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};




struct mm_struct *proc_mem_open(struct inode *inode, unsigned int mode)
{
	struct task_struct *task = get_proc_task(inode);
	struct mm_struct *mm = ERR_PTR(-ESRCH);

	if (task) {
		mm = mm_access(task, mode | PTRACE_MODE_FSCREDS);
		put_task_struct(task);

		if (!IS_ERR_OR_NULL(mm)) {
			/* ensure this mm_struct can't be freed */
			mmgrab(mm);
			/* but do not pin its memory */
			mmput(mm);
		}
	}

	return mm;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Oleg Nesterov
33
39.29%
2
22.22%
Eric W. Biedermann
20
23.81%
1
11.11%
Andrew Morton
11
13.10%
1
11.11%
Linus Torvalds
10
11.90%
1
11.11%
Américo Wang
4
4.76%
1
11.11%
Stephen Wilson
3
3.57%
1
11.11%
Jann Horn
2
2.38%
1
11.11%
Vegard Nossum
1
1.19%
1
11.11%
Total
84
100.00%
9
100.00%



static int __mem_open(struct inode *inode, struct file *file, unsigned int mode)
{
	struct mm_struct *mm = proc_mem_open(inode, mode);

	if (IS_ERR(mm))
		return PTR_ERR(mm);

	file->private_data = mm;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Oleg Nesterov
44
81.48%
1
33.33%
Linus Torvalds
8
14.81%
1
33.33%
Eric W. Biedermann
2
3.70%
1
33.33%
Total
54
100.00%
3
100.00%



static int mem_open(struct inode *inode, struct file *file)
{
	int ret = __mem_open(inode, file, PTRACE_MODE_ATTACH);

	/* OK to pass negative loff_t, we can catch out-of-range */
	file->f_mode |= FMODE_UNSIGNED_OFFSET;

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Américo Wang
25
65.79%
1
50.00%
Djalal Harouni
13
34.21%
1
50.00%
Total
38
100.00%
2
100.00%



static ssize_t mem_rw(struct file *file, char __user *buf,
			size_t count, loff_t *ppos, int write)
{
	struct mm_struct *mm = file->private_data;
	unsigned long addr = *ppos;
	ssize_t copied;
	char *page;
	unsigned int flags;

	if (!mm)
		return 0;

	page = (char *)__get_free_page(GFP_KERNEL);
	if (!page)
		return -ENOMEM;

	copied = 0;
	if (!mmget_not_zero(mm))
		goto free;

	flags = FOLL_FORCE | (write ? FOLL_WRITE : 0);

	while (count > 0) {
		int this_len = min_t(int, count, PAGE_SIZE);

		if (write && copy_from_user(page, buf, this_len)) {
			copied = -EFAULT;
			break;
		}

		this_len = access_remote_vm(mm, addr, page, this_len, flags);
		if (!this_len) {
			if (!copied)
				copied = -EIO;
			break;
		}

		if (!write && copy_to_user(buf, page, this_len)) {
			copied = -EFAULT;
			break;
		}

		buf += this_len;
		addr += this_len;
		copied += this_len;
		count -= this_len;
	}
	*ppos = addr;

	mmput(mm);
free:
	free_page((unsigned long) page);
	return copied;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Oleg Nesterov
81
33.20%
2
16.67%
Eric W. Biedermann
76
31.15%
1
8.33%
Linus Torvalds
63
25.82%
4
33.33%
Andrew Morton
12
4.92%
1
8.33%
Lorenzo Stoakes
8
3.28%
1
8.33%
Stephen Wilson
2
0.82%
1
8.33%
Vegard Nossum
1
0.41%
1
8.33%
Michal Hocko
1
0.41%
1
8.33%
Total
244
100.00%
12
100.00%



static ssize_t mem_read(struct file *file, char __user *buf,
			size_t count, loff_t *ppos)
{
	return mem_rw(file, buf, count, ppos, 0);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
15
40.54%
1
16.67%
Robert Love
12
32.43%
1
16.67%
Oleg Nesterov
7
18.92%
1
16.67%
Glauber de Oliveira Costa
1
2.70%
1
16.67%
Motohiro Kosaki
1
2.70%
1
16.67%
Linus Torvalds
1
2.70%
1
16.67%
Total
37
100.00%
6
100.00%



static ssize_t mem_write(struct file *file, const char __user *buf,
			 size_t count, loff_t *ppos)
{
	return mem_rw(file, (char __user*)buf, count, ppos, 1);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Oleg Nesterov
34
79.07%
1
50.00%
Eric W. Biedermann
9
20.93%
1
50.00%
Total
43
100.00%
2
100.00%



loff_t mem_lseek(struct file *file, loff_t offset, int orig)
{
	switch (orig) {
	case 0:
		file->f_pos = offset;
		break;
	case 1:
		file->f_pos += offset;
		break;
	default:
		return -EINVAL;
	}
	force_successful_syscall_return();
	return file->f_pos;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
44
80.00%
1
50.00%
Rick Lindsley
11
20.00%
1
50.00%
Total
55
100.00%
2
100.00%



static int mem_release(struct inode *inode, struct file *file)
{
	struct mm_struct *mm = file->private_data;
	if (mm)
		mmdrop(mm);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds
32
86.49%
1
33.33%
Oleg Nesterov
5
13.51%
2
66.67%
Total
37
100.00%
3
100.00%


static const struct file_operations proc_mem_operations = {
	.llseek		= mem_lseek,
	.read		= mem_read,
	.write		= mem_write,
	.open		= mem_open,
	.release	= mem_release,
};



static int environ_open(struct inode *inode, struct file *file)
{
	return __mem_open(inode, file, PTRACE_MODE_READ);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Américo Wang
26
100.00%
1
100.00%
Total
26
100.00%
1
100.00%



static ssize_t environ_read(struct file *file, char __user *buf,
			size_t count, loff_t *ppos)
{
	char *page;
	unsigned long src = *ppos;
	int ret = 0;
	struct mm_struct *mm = file->private_data;
	unsigned long env_start, env_end;

	/* Ensure the process spawned far enough to have an environment. */
	if (!mm || !mm->env_end)
		return 0;

	page = (char *)__get_free_page(GFP_KERNEL);
	if (!page)
		return -ENOMEM;

	ret = 0;
	if (!mmget_not_zero(mm))
		goto free;

	down_read(&mm->mmap_sem);
	env_start = mm->env_start;
	env_end = mm->env_end;
	up_read(&mm->mmap_sem);

	while (count > 0) {
		size_t this_len, max_len;
		int retval;

		if (src >= (env_end - env_start))
			break;

		this_len = env_end - (env_start + src);

		max_len = min_t(size_t, PAGE_SIZE, count);
		this_len = min(max_len, this_len);

		retval = access_remote_vm(mm, (env_start + src), page, this_len, FOLL_ANON);

		if (retval <= 0) {
			ret = retval;
			break;
		}

		if (copy_to_user(buf, page, retval)) {
			ret = -EFAULT;
			break;
		}

		ret += retval;
		src += retval;
		buf += retval;
		count -= retval;
	}
	*ppos = src;
	mmput(mm);

free:
	free_page((unsigned long) page);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
James Pearson
187
67.03%
1
11.11%
Mateusz Guzik
34
12.19%
1
11.11%
Djalal Harouni
25
8.96%
1
11.11%
Américo Wang
18
6.45%
1
11.11%
Mathias Krause
6
2.15%
1
11.11%
Al Viro
6
2.15%
1
11.11%
Vegard Nossum
1
0.36%
1
11.11%
Willy Tarreau
1
0.36%
1
11.11%
Michal Hocko
1
0.36%
1
11.11%
Total
279
100.00%
9
100.00%


static const struct file_operations proc_environ_operations = {
	.open		= environ_open,
	.read		= environ_read,
	.llseek		= generic_file_llseek,
	.release	= mem_release,
};



static int auxv_open(struct inode *inode, struct file *file)
{
	return __mem_open(inode, file, PTRACE_MODE_READ_FSCREDS);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Al Viro
26
100.00%
1
100.00%
Total
26
100.00%
1
100.00%



static ssize_t auxv_read(struct file *file, char __user *buf,
			size_t count, loff_t *ppos)
{
	struct mm_struct *mm = file->private_data;
	unsigned int nwords = 0;

	if (!mm)
		return 0;
	do {
		nwords += 2;
	} while (mm->saved_auxv[nwords - 2] != 0); /* AT_NULL */
	return simple_read_from_buffer(buf, count, ppos, mm->saved_auxv,
				       nwords * sizeof(mm->saved_auxv[0]));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Al Viro
86
91.49%
1
50.00%
Leon Yu
8
8.51%
1
50.00%
Total
94
100.00%
2
100.00%


static const struct file_operations proc_auxv_operations = {
	.open		= auxv_open,
	.read		= auxv_read,
	.llseek		= generic_file_llseek,
	.release	= mem_release,
};



static ssize_t oom_adj_read(struct file *file, char __user *buf, size_t count,
			    loff_t *ppos)
{
	struct task_struct *task = get_proc_task(file_inode(file));
	char buffer[PROC_NUMBUF];
	int oom_adj = OOM_ADJUST_MIN;
	size_t len;

	if (!task)
		return -ESRCH;
	if (task->signal->oom_score_adj == OOM_SCORE_ADJ_MAX)
		oom_adj = OOM_ADJUST_MAX;
	else
		oom_adj = (task->signal->oom_score_adj * -OOM_DISABLE) /
			  OOM_SCORE_ADJ_MAX;
	put_task_struct(task);
	len = snprintf(buffer, sizeof(buffer), "%d\n", oom_adj);
	return simple_read_from_buffer(buf, count, ppos, buffer, len);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Rientjes
121
97.58%
1
50.00%
Al Viro
3
2.42%
1
50.00%
Total
124
100.00%
2
100.00%



static int __set_oom_adj(struct file *file, int oom_adj, bool legacy)
{
	static DEFINE_MUTEX(oom_adj_mutex);
	struct mm_struct *mm = NULL;
	struct task_struct *task;
	int err = 0;

	task = get_proc_task(file_inode(file));
	if (!task)
		return -ESRCH;

	mutex_lock(&oom_adj_mutex);
	if (legacy) {
		if (oom_adj < task->signal->oom_score_adj &&
				!capable(CAP_SYS_RESOURCE)) {
			err = -EACCES;
			goto err_unlock;
		}
		/*
                 * /proc/pid/oom_adj is provided for legacy purposes, ask users to use
                 * /proc/pid/oom_score_adj instead.
                 */
		pr_warn_once("%s (%d): /proc/%d/oom_adj is deprecated, please use /proc/%d/oom_score_adj instead.\n",
			  current->comm, task_pid_nr(current), task_pid_nr(task),
			  task_pid_nr(task));
	} else {
		if ((short)oom_adj < task->signal->oom_score_adj_min &&
				!capable(CAP_SYS_RESOURCE)) {
			err = -EACCES;
			goto err_unlock;
		}
	}

	/*
         * Make sure we will check other processes sharing the mm if this is
         * not vfrok which wants its own oom_score_adj.
         * pin the mm so it doesn't go away and get reused after task_unlock
         */
	if (!task->vfork_done) {
		struct task_struct *p = find_lock_task_mm(task);

		if (p) {
			if (atomic_read(&p->mm->mm_users) > 1) {
				mm = p->mm;
				mmgrab(mm);
			}
			task_unlock(p);
		}
	}

	task->signal->oom_score_adj = oom_adj;
	if (!legacy && has_capability_noaudit(current, CAP_SYS_RESOURCE))
		task->signal->oom_score_adj_min = (short)oom_adj;
	trace_oom_score_adj_update(task);

	if (mm) {
		struct task_struct *p;

		rcu_read_lock();
		for_each_process(p) {
			if (same_thread_group(task, p))
				continue;

			/* do not touch kernel threads or the global init */
			if (p->flags & PF_KTHREAD || is_global_init(p))
				continue;

			task_lock(p);
			if (!p->vfork_done && process_shares_mm(p, mm)) {
				pr_info("updating oom_score_adj for %d (%s) from %d to %d because it shares mm with %d (%s). Report if this is unexpected.\n",
						task_pid_nr(p), p->comm,
						p->signal->oom_score_adj, oom_adj,
						task_pid_nr(task), task->comm);
				p->signal->oom_score_adj = oom_adj;
				if (!legacy && has_capability_noaudit(current, CAP_SYS_RESOURCE))
					p->signal->oom_score_adj_min = (short)oom_adj;
			}
			task_unlock(p);
		}
		rcu_read_unlock();
		mmdrop(mm);
	}
err_unlock:
	mutex_unlock(&oom_adj_mutex);
	put_task_struct(task);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Michal Hocko
404
99.75%
3
75.00%
Vegard Nossum
1
0.25%
1
25.00%
Total
405
100.00%
4
100.00%

/*
 * /proc/pid/oom_adj exists solely for backwards compatibility with previous
 * kernels.  The effective policy is defined by oom_score_adj, which has a
 * different scale: oom_adj grew exponentially and oom_score_adj grows linearly.
 * Values written to oom_adj are simply mapped linearly to oom_score_adj.
 * Processes that become oom disabled via oom_adj will still be oom disabled
 * with this implementation.
 *
 * oom_adj cannot be removed since existing userspace binaries use it.
 */


static ssize_t oom_adj_write(struct file *file, const char __user *buf,
			     size_t count, loff_t *ppos)
{
	char buffer[PROC_NUMBUF];
	int oom_adj;
	int err;

	memset(buffer, 0, sizeof(buffer));
	if (count > sizeof(buffer) - 1)
		count = sizeof(buffer) - 1;
	if (copy_from_user(buffer, buf, count)) {
		err = -EFAULT;
		goto out;
	}

	err = kstrtoint(strstrip(buffer), 0, &oom_adj);
	if (err)
		goto out;
	if ((oom_adj < OOM_ADJUST_MIN || oom_adj > OOM_ADJUST_MAX) &&
	     oom_adj != OOM_DISABLE) {
		err = -EINVAL;
		goto out;
	}

	/*
         * Scale /proc/pid/oom_score_adj appropriately ensuring that a maximum
         * value is always attainable.
         */
	if (oom_adj == OOM_ADJUST_MAX)
		oom_adj = OOM_SCORE_ADJ_MAX;
	else
		oom_adj = (oom_adj * OOM_SCORE_ADJ_MAX) / -OOM_DISABLE;

	err = __set_oom_adj(file, oom_adj, true);
out:
	return err < 0 ? err : count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Rientjes
178
97.80%
1
50.00%
Michal Hocko
4
2.20%
1
50.00%
Total
182
100.00%
2
100.00%


static const struct file_operations proc_oom_adj_operations = {
	.read		= oom_adj_read,
	.write		= oom_adj_write,
	.llseek		= generic_file_llseek,
};



static ssize_t oom_score_adj_read(struct file *file, char __user *buf,
					size_t count, loff_t *ppos)
{
	struct task_struct *task = get_proc_task(file_inode(file));
	char buffer[PROC_NUMBUF];
	short oom_score_adj = OOM_SCORE_ADJ_MIN;
	size_t len;

	if (!task)
		return -ESRCH;
	oom_score_adj = task->signal->oom_score_adj;
	put_task_struct(task);
	len = snprintf(buffer, sizeof(buffer), "%hd\n", oom_score_adj);
	return simple_read_from_buffer(buf, count, ppos, buffer, len);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Rientjes
99
97.06%
2
66.67%
Al Viro
3
2.94%
1
33.33%
Total
102
100.00%
3
100.00%



static ssize_t oom_score_adj_write(struct file *file, const char __user *buf,
					size_t count, loff_t *ppos)
{
	char buffer[PROC_NUMBUF];
	int oom_score_adj;
	int err;

	memset(buffer, 0, sizeof(buffer));
	if (count > sizeof(buffer) - 1)
		count = sizeof(buffer) - 1;
	if (copy_from_user(buffer, buf, count)) {
		err = -EFAULT;
		goto out;
	}

	err = kstrtoint(strstrip(buffer), 0, &oom_score_adj);
	if (err)
		goto out;
	if (oom_score_adj < OOM_SCORE_ADJ_MIN ||
			oom_score_adj > OOM_SCORE_ADJ_MAX) {
		err = -EINVAL;
		goto out;
	}

	err = __set_oom_adj(file, oom_score_adj, false);
out:
	return err < 0 ? err : count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Rientjes
144
94.12%
2
40.00%
Michal Hocko
4
2.61%
1
20.00%
Mandeep Singh Baines
3
1.96%
1
20.00%
Alexey Dobriyan
2
1.31%
1
20.00%
Total
153
100.00%
5
100.00%


static const struct file_operations proc_oom_score_adj_operations = {
	.read		= oom_score_adj_read,
	.write		= oom_score_adj_write,
	.llseek		= default_llseek,
};

#ifdef CONFIG_AUDITSYSCALL

#define TMPBUFLEN 11


static ssize_t proc_loginuid_read(struct file * file, char __user * buf,
				  size_t count, loff_t *ppos)
{
	struct inode * inode = file_inode(file);
	struct task_struct *task = get_proc_task(inode);
	ssize_t length;
	char tmpbuf[TMPBUFLEN];

	if (!task)
		return -ESRCH;
	length = scnprintf(tmpbuf, TMPBUFLEN, "%u",
			   from_kuid(file->f_cred->user_ns,
				     audit_get_loginuid(task)));
	put_task_struct(task);
	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
70
66.67%
3
42.86%
Linus Torvalds
27
25.71%
1
14.29%
Al Viro
8
7.62%
3
42.86%
Total
105
100.00%
7
100.00%



static ssize_t proc_loginuid_write(struct file * file, const char __user * buf,
				   size_t count, loff_t *ppos)
{
	struct inode * inode = file_inode(file);
	uid_t loginuid;
	kuid_t kloginuid;
	int rv;

	rcu_read_lock();
	if (current != pid_task(proc_pid(inode), PIDTYPE_PID)) {
		rcu_read_unlock();
		return -EPERM;
	}
	rcu_read_unlock();

	if (*ppos != 0) {
		/* No partial writes. */
		return -EINVAL;
	}

	rv = kstrtou32_from_user(buf, count, 10, &loginuid);
	if (rv < 0)
		return rv;

	/* is userspace tring to explicitly UNSET the loginuid? */
	if (loginuid == AUDIT_UID_UNSET) {
		kloginuid = INVALID_UID;
	} else {
		kloginuid = make_kuid(file->f_cred->user_ns, loginuid);
		if (!uid_valid(kloginuid))
			return -EINVAL;
	}

	rv = audit_set_loginuid(kloginuid);
	if (rv < 0)
		return rv;
	return count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
82
48.52%
3
33.33%
Al Viro
26
15.38%
2
22.22%
Alexey Dobriyan
23
13.61%
1
11.11%
Eric Paris
16
9.47%
1
11.11%
Paul E. McKenney
11
6.51%
1
11.11%
Chuck Lever
11
6.51%
1
11.11%
Total
169
100.00%
9
100.00%


static const struct file_operations proc_loginuid_operations = {
	.read		= proc_loginuid_read,
	.write		= proc_loginuid_write,
	.llseek		= generic_file_llseek,
};



static ssize_t proc_sessionid_read(struct file * file, char __user * buf,
				  size_t count, loff_t *ppos)
{
	struct inode * inode = file_inode(file);
	struct task_struct *task = get_proc_task(inode);
	ssize_t length;
	char tmpbuf[TMPBUFLEN];

	if (!task)
		return -ESRCH;
	length = scnprintf(tmpbuf, TMPBUFLEN, "%u",
				audit_get_sessionid(task));
	put_task_struct(task);
	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric Paris
93
96.88%
1
50.00%
Al Viro
3
3.12%
1
50.00%
Total
96
100.00%
2
100.00%


static const struct file_operations proc_sessionid_operations = {
	.read		= proc_sessionid_read,
	.llseek		= generic_file_llseek,
};
#endif

#ifdef CONFIG_FAULT_INJECTION


static ssize_t proc_fault_inject_read(struct file * file, char __user * buf,
				      size_t count, loff_t *ppos)
{
	struct task_struct *task = get_proc_task(file_inode(file));
	char buffer[PROC_NUMBUF];
	size_t len;
	int make_it_fail;

	if (!task)
		return -ESRCH;
	make_it_fail = task->make_it_fail;
	put_task_struct(task);

	len = snprintf(buffer, sizeof(buffer), "%i\n", make_it_fail);

	return simple_read_from_buffer(buf, count, ppos, buffer, len);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Akinobu Mita
95
96.94%
2
66.67%
Al Viro
3
3.06%
1
33.33%
Total
98
100.00%
3
100.00%



static ssize_t proc_fault_inject_write(struct file * file,
			const char __user * buf, size_t count, loff_t *ppos)
{
	struct task_struct *task;
	char buffer[PROC_NUMBUF];
	int make_it_fail;
	int rv;

	if (!capable(CAP_SYS_RESOURCE))
		return -EPERM;
	memset(buffer, 0, sizeof(buffer));
	if (count > sizeof(buffer) - 1)
		count = sizeof(buffer) - 1;
	if (copy_from_user(buffer, buf, count))
		return -EFAULT;
	rv = kstrtoint(strstrip(buffer), 0, &make_it_fail);
	if (rv < 0)
		return rv;
	if (make_it_fail < 0 || make_it_fail > 1)
		return -EINVAL;

	task = get_proc_task(file_inode(file));
	if (!task)
		return -ESRCH;
	task->make_it_fail = make_it_fail;
	put_task_struct(task);

	return count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Akinobu Mita
136
79.53%
1
20.00%
Dave Jones
14
8.19%
1
20.00%
Alexey Dobriyan
12
7.02%
1
20.00%
Vincent Li
6
3.51%
1
20.00%
Al Viro
3
1.75%
1
20.00%
Total
171
100.00%
5
100.00%


static const struct file_operations proc_fault_inject_operations = {
	.read		= proc_fault_inject_read,
	.write		= proc_fault_inject_write,
	.llseek		= generic_file_llseek,
};



static ssize_t proc_fail_nth_write(struct file *file, const char __user *buf,
				   size_t count, loff_t *ppos)
{
	struct task_struct *task;
	int err;
	unsigned int n;

	err = kstrtouint_from_user(buf, count, 0, &n);
	if (err)
		return err;

	task = get_proc_task(file_inode(file));
	if (!task)
		return -ESRCH;
	task->fail_nth = n;
	put_task_struct(task);

	return count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dmitriy Vyukov
59
65.56%
1
25.00%
Akinobu Mita
30
33.33%
2
50.00%
Alexey Dobriyan
1
1.11%
1
25.00%
Total
90
100.00%
4
100.00%



static ssize_t proc_fail_nth_read(struct file *file, char __user *buf,
				  size_t count, loff_t *ppos)
{
	struct task_struct *task;
	char numbuf[PROC_NUMBUF];
	ssize_t len;

	task = get_proc_task(file_inode(file));
	if (!task)
		return -ESRCH;
	len = snprintf(numbuf, sizeof(numbuf), "%u\n", task->fail_nth);
	len = simple_read_from_buffer(buf, count, ppos, numbuf, len);
	put_task_struct(task);

	return len;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dmitriy Vyukov
59
60.82%
1
33.33%
Akinobu Mita
38
39.18%
2
66.67%
Total
97
100.00%
3
100.00%


static const struct file_operations proc_fail_nth_operations = {
	.read		= proc_fail_nth_read,
	.write		= proc_fail_nth_write,
};
#endif


#ifdef CONFIG_SCHED_DEBUG
/*
 * Print out various scheduling related per-task fields:
 */


static int sched_show(struct seq_file *m, void *v)
{
	struct inode *inode = m->private;
	struct pid_namespace *ns = inode->i_sb->s_fs_info;
	struct task_struct *p;

	p = get_proc_task(inode);
	if (!p)
		return -ESRCH;
	proc_sched_show_task(p, ns, m);

	put_task_struct(p);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ingo Molnar
60
82.19%
1
50.00%
Aleksa Sarai
13
17.81%
1
50.00%
Total
73
100.00%
2
100.00%


static ssize_t

sched_write(struct file *file, const char __user *buf,
	    size_t count, loff_t *offset)
{
	struct inode *inode = file_inode(file);
	struct task_struct *p;

	p = get_proc_task(inode);
	if (!p)
		return -ESRCH;
	proc_sched_set_task(p);

	put_task_struct(p);

	return count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ingo Molnar
65
95.59%
1
50.00%
Al Viro
3
4.41%
1
50.00%
Total
68
100.00%
2
100.00%



static int sched_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, sched_show, inode);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ingo Molnar
24
92.31%
1
50.00%
Jovi Zhang
2
7.69%
1
50.00%
Total
26
100.00%
2
100.00%


static const struct file_operations proc_pid_sched_operations = {
	.open		= sched_open,
	.read		= seq_read,
	.write		= sched_write,
	.llseek		= seq_lseek,
	.release	= single_release,
};

#endif

#ifdef CONFIG_SCHED_AUTOGROUP
/*
 * Print out autogroup related information:
 */


static int sched_autogroup_show(struct seq_file *m, void *v)
{
	struct inode *inode = m->private;
	struct task_struct *p;

	p = get_proc_task(inode);
	if (!p)
		return -ESRCH;
	proc_sched_autogroup_show_task(p, m);

	put_task_struct(p);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Mike Galbraith
60
100.00%
1
100.00%
Total
60
100.00%
1
100.00%


static ssize_t

sched_autogroup_write(struct file *file, const char __user *buf,
	    size_t count, loff_t *offset)
{
	struct inode *inode = file_inode(file);
	struct task_struct *p;
	char buffer[PROC_NUMBUF];
	int nice;
	int err;

	memset(buffer, 0, sizeof(buffer));
	if (count > sizeof(buffer) - 1)
		count = sizeof(buffer) - 1;
	if (copy_from_user(buffer, buf, count))
		return -EFAULT;

	err = kstrtoint(strstrip(buffer), 0, &nice);
	if (err < 0)
		return err;

	p = get_proc_task(inode);
	if (!p)
		return -ESRCH;

	err = proc_sched_autogroup_set_nice(p, nice);
	if (err)
		count = err;

	put_task_struct(p);

	return count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Mike Galbraith
154
94.48%
1
25.00%
Alexey Dobriyan
5
3.07%
1
25.00%
Al Viro
3
1.84%
1
25.00%
Hiroshi Shimamoto
1
0.61%
1
25.00%
Total
163
100.00%
4
100.00%



static int sched_autogroup_open(struct inode *inode, struct file *filp)
{
	int ret;

	ret = single_open(filp, sched_autogroup_show, NULL);
	if (!ret) {
		struct seq_file *m = filp->private_data;

		m->private = inode;
	}
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Mike Galbraith
55
100.00%
1
100.00%
Total
55
100.00%
1
100.00%


static const struct file_operations proc_pid_sched_autogroup_operations = {
	.open		= sched_autogroup_open,
	.read		= seq_read,
	.write		= sched_autogroup_write,
	.llseek		= seq_lseek,
	.release	= single_release,
};

#endif /* CONFIG_SCHED_AUTOGROUP */



static ssize_t comm_write(struct file *file, const char __user *buf,
				size_t count, loff_t *offset)
{
	struct inode *inode = file_inode(file);
	struct task_struct *p;
	char buffer[TASK_COMM_LEN];
	const size_t maxlen = sizeof(buffer) - 1;

	memset(buffer, 0, sizeof(buffer));
	if (copy_from_user(buffer, buf, count > maxlen ? maxlen : count))
		return -EFAULT;

	p = get_proc_task(inode);
	if (!p)
		return -ESRCH;

	if (same_thread_group(current, p))
		set_task_comm(p, buffer);
	else
		count = -EINVAL;

	put_task_struct(p);

	return count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
John Stultz
115
85.19%
1
33.33%
David Rientjes
17
12.59%
1
33.33%
Al Viro
3
2.22%
1
33.33%
Total
135
100.00%
3
100.00%



static int comm_show(struct seq_file *m, void *v)
{
	struct inode *inode = m->private;
	struct task_struct *p;

	p = get_proc_task(inode);
	if (!p)
		return -ESRCH;

	task_lock(p);
	seq_printf(m, "%s\n", p->comm);
	task_unlock(p);

	put_task_struct(p);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
John Stultz
74
100.00%
1
100.00%
Total
74
100.00%
1
100.00%



static int comm_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, comm_show, inode);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
John Stultz
24
92.31%
1
50.00%
Jovi Zhang
2
7.69%
1
50.00%
Total
26
100.00%
2
100.00%


static const struct file_operations proc_pid_set_comm_operations = {
	.open		= comm_open,
	.read		= seq_read,
	.write		= comm_write,
	.llseek		= seq_lseek,
	.release	= single_release,
};



static int proc_exe_link(struct dentry *dentry, struct path *exe_path)
{
	struct task_struct *task;
	struct file *exe_file;

	task = get_proc_task(d_inode(dentry));
	if (!task)
		return -ENOENT;
	exe_file = get_task_exe_file(task);
	put_task_struct(task);
	if (exe_file) {
		*exe_path = exe_file->f_path;
		path_get(&exe_file->f_path);
		fput(exe_file);
		return 0;
	} else
		return -ENOENT;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Matt Helsley
83
91.21%
1
25.00%
Cyrill V. Gorcunov
3
3.30%
1
25.00%
David Howells
3
3.30%
1
25.00%
Mateusz Guzik
2
2.20%
1
25.00%
Total
91
100.00%
4
100.00%



static const char *proc_pid_get_link(struct dentry *dentry,
				     struct inode *inode,
				     struct delayed_call *done)
{
	struct path path;
	int error = -EACCES;

	if (!dentry)
		return ERR_PTR(-ECHILD);

	/* Are we allowed to snoop on the tasks file descriptors? */
	if (!proc_fd_access_allowed(inode))
		goto out;

	error = PROC_I(inode)->op.proc_get_link(dentry, &path);
	if (error)
		goto out;

	nd_jump_link(&path);
	return NULL;
out:
	return ERR_PTR(error);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
43
43.88%
2
18.18%
Christoph Hellwig
20
20.41%
2
18.18%
Al Viro
20
20.41%
3
27.27%
Linus Torvalds (pre-git)
11
11.22%
1
9.09%
Andrew Morton
2
2.04%
1
9.09%
Jan Blunck
1
1.02%
1
9.09%
Cyrill V. Gorcunov
1
1.02%
1
9.09%
Total
98
100.00%
11
100.00%



static int do_proc_readlink(struct path *path, char __user *buffer, int buflen)
{
	char *tmp = (char *)__get_free_page(GFP_KERNEL);
	char *pathname;
	int len;

	if (!tmp)
		return -ENOMEM;

	pathname = d_path(path, tmp, PAGE_SIZE);
	len = PTR_ERR(pathname);
	if (IS_ERR(pathname))
		goto out;
	len = tmp + PAGE_SIZE - 1 - pathname;

	if (len > buflen)
		len = buflen;
	if (copy_to_user(buffer, pathname, len))
		len = -EFAULT;
 out:
	free_page((unsigned long)tmp);
	return len;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
73
57.94%
3
42.86%
Linus Torvalds (pre-git)
41
32.54%
1
14.29%
Jan Blunck
9
7.14%
1
14.29%
Mel Gorman
2
1.59%
1
14.29%
Michal Hocko
1
0.79%
1
14.29%
Total
126
100.00%
7
100.00%



static int proc_pid_readlink(struct dentry * dentry, char __user * buffer, int buflen)
{
	int error = -EACCES;
	struct inode *inode = d_inode(dentry);
	struct path path;

	/* Are we allowed to snoop on the tasks file descriptors? */
	if (!proc_fd_access_allowed(inode))
		goto out;

	error = PROC_I(inode)->op.proc_get_link(dentry, &path);
	if (error)
		goto out;

	error = do_proc_readlink(&path, buffer, buflen);
	path_put(&path);
out:
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
60
61.22%
2
25.00%
Andrea Arcangeli
23
23.47%
1
12.50%
Jan Blunck
8
8.16%
1
12.50%
David Howells
3
3.06%
1
12.50%
Andrew Morton
2
2.04%
1
12.50%
Ben Dooks
1
1.02%
1
12.50%
Cyrill V. Gorcunov
1
1.02%
1
12.50%
Total
98
100.00%
8
100.00%


const struct inode_operations proc_pid_link_inode_operations = {
	.readlink	= proc_pid_readlink,
	.get_link	= proc_pid_get_link,
	.setattr	= proc_setattr,
};


/* building an inode */



void task_dump_owner(struct task_struct *task, umode_t mode,
		     kuid_t *ruid, kgid_t *rgid)
{
	/* Depending on the state of dumpable compute who should own a
         * proc file for a task.
         */
	const struct cred *cred;
	kuid_t uid;
	kgid_t gid;

	if (unlikely(task->flags & PF_KTHREAD)) {
		*ruid = GLOBAL_ROOT_UID;
		*rgid = GLOBAL_ROOT_GID;
		return;
	}

	/* Default to the tasks effective ownership */
	rcu_read_lock();
	cred = __task_cred(task);
	uid = cred->euid;
	gid = cred->egid;
	rcu_read_unlock();

	/*
         * Before the /proc/pid/status file was created the only way to read
         * the effective uid of a /process was to stat /proc/pid.  Reading
         * /proc/pid/status is slow enough that procps and other packages
         * kept stating /proc/pid.  To keep the rules in /proc simple I have
         * made this apply to all per process world readable and executable
         * directories.
         */
	if (mode != (S_IFDIR|S_IRUGO|S_IXUGO)) {
		struct mm_struct *mm;
		task_lock(task);
		mm = task->mm;
		/* Make non-dumpable tasks owned by some root */
		if (mm) {
			if (get_dumpable(mm) != SUID_DUMP_USER) {
				struct user_namespace *user_ns = mm->user_ns;

				uid = make_kuid(user_ns, 0);
				if (!uid_valid(uid))
					uid = GLOBAL_ROOT_UID;

				gid = make_kgid(user_ns, 0);
				if (!gid_valid(gid))
					gid = GLOBAL_ROOT_GID;
			}
		} else {
			uid = GLOBAL_ROOT_UID;
			gid = GLOBAL_ROOT_GID;
		}
		task_unlock(task);
	}
	*ruid = uid;
	*rgid = gid;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
185
88.10%
1
33.33%
Alexey Dobriyan
24
11.43%
1
33.33%
Al Viro
1
0.48%
1
33.33%
Total
210
100.00%
3
100.00%



struct inode *proc_pid_make_inode(struct super_block * sb,
				  struct task_struct *task, umode_t mode)
{
	struct inode * inode;
	struct proc_inode *ei;

	/* We need a new inode */

	inode = new_inode(sb);
	if (!inode)
		goto out;

	/* Common stuff */
	ei = PROC_I(inode);
	inode->i_mode = mode;
	inode->i_ino = get_next_ino();
	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
	inode->i_op = &proc_def_inode_operations;

	/*
         * grab the reference to task.
         */
	ei->pid = get_task_pid(task, PIDTYPE_PID);
	if (!ei->pid)
		goto out_unlock;

	task_dump_owner(task, 0, &inode->i_uid, &inode->i_gid);
	security_task_to_inode(task, inode);

out:
	return inode;

out_unlock:
	iput(inode);
	return NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
94
61.84%
5
45.45%
Andrea Arcangeli
32
21.05%
1
9.09%
Andreas Gruenbacher
9
5.92%
1
9.09%
Christoph Hellwig
7
4.61%
1
9.09%
Deepa Dinamani
4
2.63%
1
9.09%
David Howells
3
1.97%
1
9.09%
Oleg Nesterov
3
1.97%
1
9.09%
Total
152
100.00%
11
100.00%



int pid_getattr(const struct path *path, struct kstat *stat,
		u32 request_mask, unsigned int query_flags)
{
	struct inode *inode = d_inode(path->dentry);
	struct task_struct *task;
	struct pid_namespace *pid = path->dentry->d_sb->s_fs_info;

	generic_fillattr(inode, stat);

	rcu_read_lock();
	stat->uid = GLOBAL_ROOT_UID;
	stat->gid = GLOBAL_ROOT_GID;
	task = pid_task(proc_pid(inode), PIDTYPE_PID);
	if (task) {
		if (!has_pid_permissions(pid, task, HIDEPID_INVISIBLE)) {
			rcu_read_unlock();
			/*
                         * This doesn't prevent learning whether PID exists,
                         * it only makes getattr() consistent with readdir().
                         */
			return -ENOENT;
		}
		task_dump_owner(task, inode->i_mode, &stat->uid, &stat->gid);
	}
	rcu_read_unlock();
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
62
44.29%
4
44.44%
Serge E. Hallyn
30
21.43%
1
11.11%
Vasiliy Kulikov
30
21.43%
1
11.11%
David Howells
17
12.14%
2
22.22%
Lafcadio Wluiki
1
0.71%
1
11.11%
Total
140
100.00%
9
100.00%

/* dentry stuff */

/*
 *      Exceptional case: normally we are not allowed to unhash a busy
 * directory. In this case, however, we can do it - no aliasing problems
 * due to the way we treat inodes.
 *
 * Rewrite the inode's ownerships here because the owning task may have
 * performed a setuid(), etc.
 *
 */


int pid_revalidate(struct dentry *dentry, unsigned int flags)
{
	struct inode *inode;
	struct task_struct *task;

	if (flags & LOOKUP_RCU)
		return -ECHILD;

	inode = d_inode(dentry);
	task = get_proc_task(inode);

	if (task) {
		task_dump_owner(task, inode->i_mode, &inode->i_uid, &inode->i_gid);

		inode->i_mode &= ~(S_ISUID | S_ISGID);
		security_task_to_inode(task, inode);
		put_task_struct(task);
		return 1;
	}
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
50
49.02%
2
33.33%
Serge E. Hallyn
25
24.51%
1
16.67%
Nicholas Piggin
21
20.59%
1
16.67%
David Howells
3
2.94%
1
16.67%
Al Viro
3
2.94%
1
16.67%
Total
102
100.00%
6
100.00%



static inline bool proc_inode_is_dead(struct inode *inode)
{
	return !proc_pid(inode)->tasks[PIDTYPE_PID].first;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Oleg Nesterov
26
100.00%
1
100.00%
Total
26
100.00%
1
100.00%



int pid_delete_dentry(const struct dentry *dentry)
{
	/* Is the task we represent dead?
         * If so, then don't put the dentry on the lru list,
         * kill it immediately.
         */
	return proc_inode_is_dead(d_inode(dentry));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
20
95.24%
2
66.67%
Oleg Nesterov
1
4.76%
1
33.33%
Total
21
100.00%
3
100.00%


const struct dentry_operations pid_dentry_operations =
{
	.d_revalidate	= pid_revalidate,
	.d_delete	= pid_delete_dentry,
};

/* Lookups */

/*
 * Fill a directory entry.
 *
 * If possible create the dcache entry and derive our inode number and
 * file type from dcache entry.
 *
 * Since all of the proc inode numbers are dynamically generated, the inode
 * numbers do not exist until the inode is cache.  This means creating the
 * the dcache entry in readdir is necessary to keep the inode numbers
 * reported by readdir in sync with the inode numbers reported
 * by stat.
 */


bool proc_fill_cache(struct file *file, struct dir_context *ctx,
	const char *name, int len,
	instantiate_t instantiate, struct task_struct *task, const void *ptr)
{
	struct dentry *child, *dir = file->f_path.dentry;
	struct qstr qname = QSTR_INIT(name, len);
	struct inode *inode;
	unsigned type;
	ino_t ino;

	child = d_hash_and_lookup(dir, &qname);
	if (!child) {
		DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
		child = d_alloc_parallel(dir, &qname, &wq);
		if (IS_ERR(child))
			goto end_instantiate;
		if (d_in_lookup(child)) {
			int err = instantiate(d_inode(dir), child, task, ptr);
			d_lookup_done(child);
			if (err < 0) {
				dput(child);
				goto end_instantiate;
			}
		}
	}
	inode = d_inode(child);
	ino = inode->i_ino;
	type = inode->i_mode >> 12;
	dput(child);
	return dir_emit(ctx, name, len, ino, type);

end_instantiate:
	return dir_emit(ctx, name, len, 1, DT_UNKNOWN);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
126
57.27%
3
30.00%
Al Viro
82
37.27%
3
30.00%
David Howells
6
2.73%
1
10.00%
Josef 'Jeff' Sipek
3
1.36%
1
10.00%
Andrea Arcangeli
2
0.91%
1
10.00%
Eric Dumazet
1
0.45%
1
10.00%
Total
220
100.00%
10
100.00%

/*
 * dname_to_vma_addr - maps a dentry name into two unsigned longs
 * which represent vma start and end addresses.
 */


static int dname_to_vma_addr(struct dentry *dentry,
			     unsigned long *start, unsigned long *end)
{
	const char *str = dentry->d_name.name;
	unsigned long long sval, eval;
	unsigned int len;

	if (str[0] == '0' && str[1] != '-')
		return -EINVAL;
	len = _parse_integer(str, 16, &sval);
	if (len & KSTRTOX_OVERFLOW)
		return -EINVAL;
	if (sval != (unsigned long)sval)
		return -EINVAL;
	str += len;

	if (*str != '-')
		return -EINVAL;
	str++;

	if (str[0] == '0' && str[1])
		return -EINVAL;
	len = _parse_integer(str, 16, &eval);
	if (len & KSTRTOX_OVERFLOW)
		return -EINVAL;
	if (eval != (unsigned long)eval)
		return -EINVAL;
	str += len;

	if (*str != '\0')
		return -EINVAL;

	*start = sval;
	*end = eval;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alexey Dobriyan
160
80.40%
2
33.33%
Cyrill V. Gorcunov
20
10.05%
1
16.67%
Eric W. Biedermann
13
6.53%
2
33.33%
Andrea Arcangeli
6
3.02%
1
16.67%
Total
199
100.00%
6
100.00%



static int map_files_d_revalidate(struct dentry *dentry, unsigned int flags)
{
	unsigned long vm_start, vm_end;
	bool exact_vma_exists = false;
	struct mm_struct *mm = NULL;
	struct task_struct *task;
	struct inode *inode;
	int status = 0;

	if (flags & LOOKUP_RCU)
		return -ECHILD;

	inode = d_inode(dentry);
	task = get_proc_task(inode);
	if (!task)
		goto out_notask;

	mm = mm_access(task, PTRACE_MODE_READ_FSCREDS);
	if (IS_ERR_OR_NULL(mm))
		goto out;

	if (!dname_to_vma_addr(dentry, &vm_start, &vm_end)) {
		down_read(&mm->mmap_sem);
		exact_vma_exists = !!find_exact_vma(mm, vm_start, vm_end);
		up_read(&mm->mmap_sem);
	}

	mmput(mm);

	if (exact_vma_exists) {
		task_dump_owner(task, 0, &inode->i_uid, &inode->i_gid);

		security_task_to_inode(task, inode);
		status = 1;
	}

out:
	put_task_struct(task);

out_notask:
	return status;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Cyrill V. Gorcunov
116
59.49%
1
10.00%
Eric W. Biedermann
33
16.92%
3
30.00%
Andrea Arcangeli
29
14.87%
1
10.00%
Linus Torvalds
11
5.64%
2
20.00%
David Howells
3
1.54%
1
10.00%
Miklos Szeredi
2
1.03%
1
10.00%
Jann Horn
1
0.51%
1
10.00%
Total
195
100.00%
10
100.00%


static const struct dentry_operations tid_map_files_dentry_operations = {
	.d_revalidate	= map_files_d_revalidate,
	.d_delete	= pid_delete_dentry,
};



static int map_files_get_link(struct dentry *dentry, struct path *path)
{
	unsigned long vm_start, vm_end;
	struct vm_area_struct *vma;
	struct task_struct *task;
	struct mm_struct *mm;
	int rc;

	rc = -ENOENT;
	task = get_proc_task(d_inode(dentry));
	if (!task)
		goto out;

	mm = get_task_mm(task);
	put_task_struct(task);
	if (!mm)
		goto out;

	rc = dname_to_vma_addr(dentry, &vm_start, &vm_end);
	if (rc)
		goto out_mmput;

	rc = -ENOENT;
	down_read(&mm->mmap_sem);
	vma = find_exact_vma(mm, vm_start, vm_end);
	if (vma && vma->vm_file) {
		*path = vma->vm_file->f_path;
		path_get(path);
		rc = 0;
	}
	up_read(&mm->mmap_sem);

out_mmput:
	mmput(mm);
out:
	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Cyrill V. Gorcunov
96
54.86%
1
7.14%
Eric W. Biedermann
26
14.86%
1
7.14%
Linus Torvalds (pre-git)
22
12.57%
4
28.57%
Nicholas Piggin
10
5.71%
1
7.14%
Linus Torvalds
8
4.57%
2
14.29%
David Howells
5
2.86%
2
14.29%
Artem Fetishev
5
2.86%
1
7.14%
Al Viro
3
1.71%
2
14.29%
Total
175
100.00%
14
100.00%


struct map_files_info {
	
unsigned long	start;
	
unsigned long	end;
	
fmode_t		mode;
};

/*
 * Only allow CAP_SYS_ADMIN to follow the links, due to concerns about how the
 * symlinks may be used to bypass permissions on ancestor directories in the
 * path to the file in question.
 */

static const char *

proc_map_files_get_link(struct dentry *dentry,
			struct inode *inode,
		        struct delayed_call *done)
{
	if (!capable(CAP_SYS_ADMIN))
		return ERR_PTR(-EPERM);

	return proc_pid_get_link(dentry, inode, done);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Calvin Owens
36
75.00%
1
33.33%
Al Viro
12
25.00%
2
66.67%
Total
48
100.00%
3
100.00%

/*
 * Identical to proc_pid_link_inode_operations except for get_link()
 */

static const struct inode_operations proc_map_files_link_inode_operations = {
	.readlink	= proc_pid_readlink,
	.get_link	= proc_map_files_get_link,
	.setattr	= proc_setattr,
};


static int

proc_map_files_instantiate(struct inode *dir, struct dentry *dentry,
			   struct task_struct *task, const void *ptr)
{
	fmode_t mode = (fmode_t)(unsigned long)ptr;
	struct proc_inode *ei;
	struct inode *inode;

	inode = proc_pid_make_inode(dir->i_sb, task, S_IFLNK |
				    ((mode & FMODE_READ ) ? S_IRUSR : 0) |
				    ((mode & FMODE_WRITE) ? S_IWUSR : 0));
	if (!inode)
		return -ENOENT;

	ei = PROC_I(inode);
	ei->op.proc_get_link = map_files_get_link;

	inode->i_op = &proc_map_files_link_inode_operations;
	inode->i_size = 64;

	d_set_d_op(dentry, &tid_map_files_dentry_operations);
	d_add(dentry, inode);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
61
43.57%
3
20.00%
Andreas Gruenbacher
26
18.57%
1
6.67%
Al Viro
23
16.43%
4
26.67%
Cyrill V. Gorcunov
11
7.86%
1
6.67%
Linus Torvalds (pre-git)
8
5.71%
1
6.67%
Linus Torvalds
4
2.86%
1
6.67%
Nicholas Piggin
4
2.86%
1
6.67%
Calvin Owens
1
0.71%
1
6.67%
Alexey Dobriyan
1
0.71%
1
6.67%
Eric Dumazet
1
0.71%
1
6.67%
Total
140
100.00%
15
100.00%



static struct dentry *proc_map_files_lookup(struct inode *dir,
		struct dentry *dentry, unsigned int flags)
{
	unsigned long vm_start, vm_end;
	struct vm_area_struct *vma;
	struct task_struct *task;
	int result;
	struct mm_struct *mm;

	result = -ENOENT;
	task = get_proc_task(dir);
	if (!task)
		goto out;

	result = -EACCES;
	if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
		goto out_put_task;

	result = -ENOENT;
	if (dname_to_vma_addr(dentry, &vm_start, &vm_end))
		goto out_put_task;

	mm = get_task_mm(task);
	if (!mm)
		goto out_put_task;

	down_read(&mm->mmap_sem);
	vma = find_exact_vma(mm, vm_start, vm_end);
	if (!vma)
		goto out_no_vma;

	if (vma->vm_file)
		result = proc_map_files_instantiate(dir, dentry, task,
				(void *)(unsigned long)vma->vm_file->f_mode);

out_no_vma:
	up_read(&mm->mmap_sem);
	mmput(mm);
out_put_task:
	put_task_struct(task);
out:
	return ERR_PTR(result);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Cyrill V. Gorcunov
132
63.46%
1
14.29%
Eric W. Biedermann
55
26.44%
1
14.29%
Alexey Dobriyan
8
3.85%
1
14.29%
Al Viro
6
2.88%
2
28.57%
Stanislav Kinsbursky
6
2.88%
1
14.29%
Jann Horn
1
0.48%
1
14.29%
Total
208
100.00%
7
100.00%


static const struct inode_operations proc_map_files_inode_operations = {
	.lookup		= proc_map_files_lookup,
	.permission	= proc_fd_permission,
	.setattr	= proc_setattr,
};


static int

proc_map_files_readdir(struct file *file, struct dir_context *ctx)
{
	struct vm_area_struct *vma;
	struct task_struct *task;
	struct mm_struct *mm;
	unsigned long nr_files, pos, i;
	struct flex_array *fa = NULL;
	struct map_files_info info;
	struct map_files_info *p;
	int ret;

	ret = -ENOENT;
	task = get_proc_task(file_inode(file));
	if (!task)
		goto out;

	ret = -EACCES;
	if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
		goto out_put_task;

	ret = 0;
	if (!dir_emit_dots(file, ctx))
		goto out_put_task;

	mm = get_task_mm(task);
	if (!mm)
		goto out_put_task;
	down_read(&mm->mmap_sem);

	nr_files = 0;

	/*
         * We need two passes here:
         *
         *  1) Collect vmas of mapped files with mmap_sem taken
         *  2) Release mmap_sem and instantiate entries
         *
         * otherwise we get lockdep complained, since filldir()
         * routine might require mmap_sem taken in might_fault().
         */

	for (vma = mm->mmap, pos = 2; vma; vma = vma->vm_next) {
		if (vma->vm_file && ++pos > ctx->pos)
			nr_files++;
	}

	if (nr_files) {
		fa = flex_array_alloc(sizeof(info), nr_files,
					GFP_KERNEL);
		if (!fa || flex_array_prealloc(fa, 0, nr_files,
						GFP_KERNEL)) {
			ret = -ENOMEM;
			if (fa)
				flex_array_free(fa);
			up_read(&mm->mmap_sem);
			mmput(mm);
			goto out_put_task;
		}
		for (i = 0, vma = mm->mmap, pos = 2; vma;
				vma = vma->vm_next) {
			if (!vma->vm_file)
				continue;
			if (++pos <= ctx->pos)
				continue;

			info.start = vma->vm_start;
			info.end = vma->vm_end;
			info.mode = vma->vm_file->f_mode;
			if (flex_array_put(fa, i++, &info, GFP_KERNEL))
				BUG();
		}
	}
	up_read(&mm->mmap_sem);
	mmput(mm);

	for (i = 0; i < nr_files; i++) {
		char buf[4 * sizeof(long) + 2];	/* max: %lx-%lx\0 */
		unsigned int len;

		p = flex_array_get(fa, i);
		len = snprintf(buf, sizeof(buf), "%lx-%lx", p->start, p->end);
		if (!proc_fill_cache(file, ctx,
				      buf, len,
				      proc_map_files_instantiate,
				      task,
				      (void *)(unsigned long)p->mode))
			break;
		ctx->pos++;
	}
	if (fa)
		flex_array_free(fa);

out_put_task:
	put_task_struct(task);
out:
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Cyrill V. Gorcunov
217
45.97%
1
6.25%
Alexey Dobriyan
69
14.62%
4
25.00%
Al Viro
57
12.08%
3
18.75%
Pavel Emelyanov
40
8.47%
1
6.25%
Miklos Szeredi
38
8.05%
1
6.25%
Linus Torvalds (pre-git)
33
6.99%
3
18.75%
Andrew Morton
9
1.91%
1
6.25%
Eric W. Biedermann
8
1.69%
1
6.25%
Jann Horn
1
0.21%
1
6.25%
Total
472
100.00%
16
100.00%


static const struct file_operations proc_map_files_operations = {
	.read		= generic_read_dir,
	.iterate_shared	= proc_map_files_readdir,
	.llseek		= generic_file_llseek,
};

#if defined(CONFIG_CHECKPOINT_RESTORE) && defined(CONFIG_POSIX_TIMERS)

struct timers_private {
	
struct pid *pid;
	
struct task_struct *task;
	
struct sighand_struct *sighand;
	
struct pid_namespace *ns;
	
unsigned long flags;
};



static void *timers_start(struct seq_file *m, loff_t *pos)
{
	struct timers_private *tp = m->private;

	tp->task = get_pid_task(tp->pid, PIDTYPE_PID);
	if (!tp->task)
		return ERR_PTR(-ESRCH);

	tp->sighand = lock_task_sighand(tp->task, &tp->flags);
	if (!tp->sighand)
		return ERR_PTR(-ESRCH);

	return seq_list_start(&tp->task->signal->posix_timers, *pos);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Pavel Emelyanov
98
100.00%
1
100.00%
Total
98
100.00%
1
100.00%



static void *timers_next(struct seq_file *m, void *v, loff_t *pos)
{
	struct timers_private *tp = m->private;
	return seq_list_next(v, &tp->task->signal->posix_timers, pos);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Pavel Emelyanov
46
100.00%
1
100.00%
Total
46
100.00%
1
100.00%



static void timers_stop(struct seq_file *m, void *v)
{
	struct timers_private *tp = m->private;

	if (tp->sighand) {
		unlock_task_sighand(tp->task, &tp->flags);
		tp->sighand = NULL;
	}

	if (tp->task) {
		put_task_struct(tp->task);
		tp->task = NULL;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Pavel Emelyanov
71
100.00%
1
100.00%
Total
71
100.00%
1
100.00%



static int show_timer(struct seq_file *m, void *v)
{
	struct k_itimer *timer;
	struct timers_private *tp = m->private;
	int notify;
	static const char * const nstr[] = {
		[SIGEV_SIGNAL] = "signal",
		[SIGEV_NONE] = "none",
		[SIGEV_THREAD] = "thread",
        };

	timer = list_entry((struct list_head *)v, struct k_itimer, list);
	notify = timer->it_sigev_notify;

	seq_printf(m, "ID: %d\n", timer->it_id);
	seq_printf(m, "signal: %d/%px\n",
		   timer->sigq->info.si_signo,
		   timer->sigq->info.si_value.sival_ptr);
	seq_printf(m, "notify: %s/%s.%d\n",
		   nstr[notify & ~SIGEV_THREAD_ID],
		   (notify & SIGEV_THREAD_ID) ? "tid" : "pid",
		   pid_nr_ns(timer->it_pid, tp->ns));
	seq_printf(m, "ClockID: %d\n", timer->it_clock);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Pavel Emelyanov
155
91.72%
2
40.00%
Pavel Tikhomirov
11
6.51%
1
20.00%
Alexey Dobriyan
2
1.18%
1
20.00%
Linus Torvalds
1
0.59%
1
20.00%
Total
169
100.00%
5
100.00%


static const struct seq_operations proc_timers_seq_ops = {
	.start	= timers_start,
	.next	= timers_next,
	.stop	= timers_stop,
	.show	= show_timer,
};



static int proc_timers_open(struct inode *inode, struct file *file)
{
	struct timers_private *tp;

	tp = __seq_open_private(file, &proc_timers_seq_ops,
			sizeof(struct timers_private));
	if (!tp)
		return -ENOMEM;

	tp->pid = proc_pid(inode);
	tp->ns = inode->i_sb->s_fs_info;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Pavel Emelyanov
68
100.00%
2
100.00%
Total
68
100.00%
2
100.00%


static const struct file_operations proc_timers_operations = {
	.open		= proc_timers_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release_private,
};
#endif



static ssize_t timerslack_ns_write(struct file *file, const char __user *buf,
					size_t count, loff_t *offset)
{
	struct inode *inode = file_inode(file);
	struct task_struct *p;
	u64 slack_ns;
	int err;

	err = kstrtoull_from_user(buf, count, 10, &slack_ns);
	if (err < 0)
		return err;

	p = get_proc_task(inode);
	if (!p)
		return -ESRCH;

	if (p != current) {
		if (!capable(CAP_SYS_NICE)) {
			count = -EPERM;
			goto out;
		}

		err = security_task_setscheduler(p);
		if (err) {
			count = err;
			goto out;
		}
	}

	task_lock(p);
	if (slack_ns == 0)
		p->timer_slack_ns = p->default_timer_slack_ns;
	else
		p->timer_slack_ns = slack_ns;
	task_unlock(p);

out:
	put_task_struct(p);

	return count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
John Stultz
171
100.00%
4
100.00%
Total
171
100.00%
4
100.00%



static int timerslack_ns_show(struct seq_file *m, void *v)
{
	struct inode *inode = m->private;
	struct task_struct *p;
	int err = 0;

	p = get_proc_task(inode);
	if (!p)
		return -ESRCH;

	if (p != current) {

		if (!capable(CAP_SYS_NICE)) {
			err = -EPERM;
			goto out;
		}
		err = security_task_getscheduler(p);
		if (err)
			goto out;
	}

	task_lock(p);
	seq_printf(m, "%llu\n", p->timer_slack_ns);
	task_unlock(p);

out:
	put_task_struct(p);

	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
John Stultz
121
100.00%
4
100.00%
Total
121
100.00%
4
100.00%



static int timerslack_ns_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, timerslack_ns_show, inode);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
John Stultz
26
100.00%
1
100.00%
Total
26
100.00%
1
100.00%


static const struct file_operations proc_pid_set_timerslack_ns_operations = {
	.open		= timerslack_ns_open,
	.read		= seq_read,
	.write		= timerslack_ns_write,
	.llseek		= seq_lseek,
	.release	= single_release,
};



static int proc_pident_instantiate(struct inode *dir,
	struct dentry *dentry, struct task_struct *task, const void *ptr)
{
	const struct pid_entry *p = ptr;
	struct inode *inode;
	struct proc_inode *ei;

	inode = proc_pid_make_inode(dir->i_sb, task, p->mode);
	if (!inode)
		goto out;

	ei = PROC_I(inode);
	if (S_ISDIR(inode->i_mode))
		set_nlink(inode, 2);	/* Use getattr to fix if necessary */
	if (p->iop)
		inode->i_op = p->iop;
	if (p->fop)
		inode->i_fop = p->fop;
	ei->op = p->op;
	d_set_d_op(dentry, &pid_dentry_operations);
	d_add(dentry, inode);
	/* Close the race of the process dying before we return the dentry */
	if (pid_revalidate(dentry, 0))
		return 0;
out:
	return -ENOENT;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
104
64.60%
4
25.00%
Linus Torvalds (pre-git)
22
13.66%
2
12.50%
Andrew Morton
10
6.21%
2
12.50%
Al Viro
7
4.35%
2
12.50%
Andreas Gruenbacher
4
2.48%
1
6.25%
Nicholas Piggin
4
2.48%
1
6.25%
Miklos Szeredi
4
2.48%
1
6.25%
Dave Hansen
3
1.86%
1
6.25%
Eric Dumazet
2
1.24%
1
6.25%
Linus Torvalds
1
0.62%
1
6.25%
Total
161
100.00%
16
100.00%



static struct dentry *proc_pident_lookup(struct inode *dir, 
					 struct dentry *dentry,
					 const struct pid_entry *ents,
					 unsigned int nents)
{
	int error;
	struct task_struct *task = get_proc_task(dir);
	const struct pid_entry *p, *last;

	error = -ENOENT;

	if (!task)
		goto out_no_task;

	/*
         * Yes, it does not scale. And it should not. Don't add
         * new entries into /proc/<tgid>/ without very good reasons.
         */
	last = &ents[nents];
	for (p = ents; p < last; p++) {
		if (p->len != dentry->d_name.len)
			continue;
		if (!memcmp(dentry->d_name.name, p->name, p->len))
			break;
	}
	if (p >= last)
		goto out;

	error = proc_pident_instantiate(dir, dentry, task, p);
out:
	put_task_struct(task);
out_no_task:
	return ERR_PTR(error);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
150
94.94%
3
50.00%
Al Viro
4
2.53%
1
16.67%
Alexey Dobriyan
2
1.27%
1
16.67%
Eric Dumazet
2
1.27%
1
16.67%
Total
158
100.00%
6
100.00%



static int proc_pident_readdir(struct file *file, struct dir_context *ctx,
		const struct pid_entry *ents, unsigned int nents)
{
	struct task_struct *task = get_proc_task(file_inode(file));
	const struct pid_entry *p;

	if (!task)
		return -ENOENT;

	if (!dir_emit_dots(file, ctx))
		goto out;

	if (ctx->pos >= nents + 2)
		goto out;

	for (p = ents + (ctx->pos - 2); p < ents + nents; p++) {
		if (!proc_fill_cache(file, ctx, p->name, p->len,
				proc_pident_instantiate, task, p))
			break;
		ctx->pos++;
	}
out:
	put_task_struct(task);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Al Viro
65
44.83%
2
20.00%
Eric W. Biedermann
52
35.86%
3
30.00%
Linus Torvalds (pre-git)
26
17.93%
3
30.00%
Alexey Dobriyan
1
0.69%
1
10.00%
Eric Dumazet
1
0.69%
1
10.00%
Total
145
100.00%
10
100.00%

#ifdef CONFIG_SECURITY


static ssize_t proc_pid_attr_read(struct file * file, char __user * buf,
				  size_t count, loff_t *ppos)
{
	struct inode * inode = file_inode(file);
	char *p = NULL;
	ssize_t length;
	struct task_struct *task = get_proc_task(inode);

	if (!task)
		return -ESRCH;

	length = security_getprocattr(task,
				      (char*)file->f_path.dentry->d_name.name,
				      &p);
	put_task_struct(task);
	if (length > 0)
		length = simple_read_from_buffer(buf, count, ppos, p, length);
	kfree(p);
	return length;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
56
47.06%
3
30.00%
Al Viro
47
39.50%
4
40.00%
Linus Torvalds (pre-git)
11
9.24%
1
10.00%
Josef 'Jeff' Sipek
3
2.52%
1
10.00%
Trond Myklebust
2
1.68%
1
10.00%
Total
119
100.00%
10
100.00%



static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf,
				   size_t count, loff_t *ppos)
{
	struct inode * inode = file_inode(file);
	void *page;
	ssize_t length;
	struct task_struct *task = get_proc_task(inode);

	length = -ESRCH;
	if (!task)
		goto out_no_task;

	/* A task may only write its own attributes. */
	length = -EACCES;
	if (current != task)
		goto out;

	if (count > PAGE_SIZE)
		count = PAGE_SIZE;

	/* No partial writes. */
	length = -EINVAL;
	if (*ppos != 0)
		goto out;

	page = memdup_user(buf, count);
	if (IS_ERR(page)) {
		length = PTR_ERR(page);
		goto out;
	}

	/* Guard against adverse ptrace interaction */
	length = mutex_lock_interruptible(&current->signal->cred_guard_mutex);
	if (length < 0)
		goto out_free;

	length = security_setprocattr(file->f_path.dentry->d_name.name,
				      page, count);
	mutex_unlock(&current->signal->cred_guard_mutex);
out_free:
	kfree(page);
out:
	put_task_struct(task);
out_no_task:
	return length;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
59
29.06%
2
14.29%
Andrew Morton
54
26.60%
2
14.29%
David Howells
26
12.81%
1
7.14%
Al Viro
19
9.36%
3
21.43%
Stephen D. Smalley
17
8.37%
1
7.14%
Linus Torvalds (pre-git)
13
6.40%
1
7.14%
Albert D. Cahalan
7
3.45%
1
7.14%
Motohiro Kosaki
4
1.97%
1
7.14%
Josef 'Jeff' Sipek
3
1.48%
1
7.14%
Chris Wright
1
0.49%
1
7.14%
Total
203
100.00%
14
100.00%


static const struct file_operations proc_pid_attr_operations = {
	.read		= proc_pid_attr_read,
	.write		= proc_pid_attr_write,
	.llseek		= generic_file_llseek,
};


static const struct pid_entry attr_dir_stuff[] = {
	REG("current",    S_IRUGO|S_IWUGO, proc_pid_attr_operations),
	REG("prev",       S_IRUGO,	   proc_pid_attr_operations),
	REG("exec",       S_IRUGO|S_IWUGO, proc_pid_attr_operations),
	REG("fscreate",   S_IRUGO|S_IWUGO, proc_pid_attr_operations),
	REG("keycreate",  S_IRUGO|S_IWUGO, proc_pid_attr_operations),
	REG("sockcreate", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
};



static int proc_attr_dir_readdir(struct file *file, struct dir_context *ctx)
{
	return proc_pident_readdir(file, ctx, 
				   attr_dir_stuff, ARRAY_SIZE(attr_dir_stuff));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
23
74.19%
2
50.00%
Al Viro
6
19.35%
1
25.00%
Andrew Morton
2
6.45%
1
25.00%
Total
31
100.00%
4
100.00%


static const struct file_operations proc_attr_dir_operations = {
	.read		= generic_read_dir,
	.iterate_shared	= proc_attr_dir_readdir,
	.llseek		= generic_file_llseek,
};



static struct dentry *proc_attr_dir_lookup(struct inode *dir,
				struct dentry *dentry, unsigned int flags)
{
	return proc_pident_lookup(dir, dentry,
				  attr_dir_stuff, ARRAY_SIZE(attr_dir_stuff));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
17
45.95%
3
60.00%
Andrew Morton
17
45.95%
1
20.00%
Al Viro
3
8.11%
1
20.00%
Total
37
100.00%
5
100.00%


static const struct inode_operations proc_attr_dir_inode_operations = {
	.lookup		= proc_attr_dir_lookup,
	.getattr	= pid_getattr,
	.setattr	= proc_setattr,
};

#endif

#ifdef CONFIG_ELF_CORE


static ssize_t proc_coredump_filter_read(struct file *file, char __user *buf,
					 size_t count, loff_t *ppos)
{
	struct task_struct *task = get_proc_task(file_inode(file));
	struct mm_struct *mm;
	char buffer[PROC_NUMBUF];
	size_t len;
	int ret;

	if (!task)
		return -ESRCH;

	ret = 0;
	mm = get_task_mm(task);
	if (mm) {
		len = snprintf(buffer, sizeof(buffer), "%08lx\n",
			       ((mm->flags & MMF_DUMP_FILTER_MASK) >>
				MMF_DUMP_FILTER_SHIFT));
		mmput(mm);
		ret = simple_read_from_buffer(buf, count, ppos, buffer, len);
	}

	put_task_struct(task);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Hidehiro Kawai
130
97.74%
1
50.00%
Al Viro
3
2.26%
1
50.00%
Total
133
100.00%
2
100.00%



static ssize_t proc_coredump_filter_write(struct file *file,
					  const char __user *buf,
					  size_t count,
					  loff_t *ppos)
{
	struct task_struct *task;
	struct mm_struct *mm;
	unsigned int val;
	int ret;
	int i;
	unsigned long mask;

	ret = kstrtouint_from_user(buf, count, 0, &val);
	if (ret < 0)
		return ret;

	ret = -ESRCH;
	task = get_proc_task(file_inode(file));
	if (!task)
		goto out_no_task;

	mm = get_task_mm(task);
	if (!mm)
		goto out_no_mm;
	ret = 0;

	for (i = 0, mask = 1; i < MMF_DUMP_FILTER_BITS; i++, mask <<= 1) {
		if (val & mask)
			set_bit(i + MMF_DUMP_FILTER_SHIFT, &mm->flags);
		else
			clear_bit(i + MMF_DUMP_FILTER_SHIFT, &mm->flags);
	}

	mmput(mm);
 out_no_mm:
	put_task_struct(task);
 out_no_task:
	if (ret < 0)
		return ret;
	return count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Hidehiro Kawai
168
87.05%
1
25.00%
Alexey Dobriyan
18
9.33%
1
25.00%
Colin Ian King
4
2.07%
1
25.00%
Al Viro
3
1.55%
1
25.00%
Total
193
100.00%
4
100.00%


static const struct file_operations proc_coredump_filter_operations = {
	.read		= proc_coredump_filter_read,
	.write		= proc_coredump_filter_write,
	.llseek		= generic_file_llseek,
};
#endif

#ifdef CONFIG_TASK_IO_ACCOUNTING


static int do_io_accounting(struct task_struct *task, struct seq_file *m, int whole)
{
	struct task_io_accounting acct = task->ioac;
	unsigned long flags;
	int result;

	result = mutex_lock_killable(&task->signal->cred_guard_mutex);
	if (result)
		return result;

	if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS)) {
		result = -EACCES;
		goto out_unlock;
	}

	if (whole && lock_task_sighand(task, &flags)) {
		struct task_struct *t = task;

		task_io_accounting_add(&acct, &task->signal->ioac);
		while_each_thread(task, t)
			task_io_accounting_add(&acct, &t->ioac);

		unlock_task_sighand(task, &flags);
	}
	seq_printf(m,
		   "rchar: %llu\n"
		   "wchar: %llu\n"
		   "syscr: %llu\n"
		   "syscw: %llu\n"
		   "read_bytes: %llu\n"
		   "write_bytes: %llu\n"
		   "cancelled_write_bytes: %llu\n",
		   (unsigned long long)acct.rchar,
		   (unsigned long long)acct.wchar,
		   (unsigned long long)acct.syscr,
		   (unsigned long long)acct.syscw,
		   (unsigned long long)acct.read_bytes,
		   (unsigned long long)acct.write_bytes,
		   (unsigned long long)acct.cancelled_write_bytes);
	result = 0;

out_unlock:
	mutex_unlock(&task->signal->cred_guard_mutex);
	return result;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrea Righi
89
39.21%
4
36.36%
Vasiliy Kulikov
56
24.67%
2
18.18%
Andrew Morton
37
16.30%
1
9.09%
Alexander Beregalov
35
15.42%
1
9.09%
Alexey Dobriyan
5
2.20%
1
9.09%
Joe Perches
4
1.76%
1
9.09%
Jann Horn
1
0.44%
1
9.09%
Total
227
100.00%
11
100.00%



static int proc_tid_io_accounting(struct seq_file *m, struct pid_namespace *ns,
				  struct pid *pid, struct task_struct *task)
{
	return do_io_accounting(task, m, 0);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrea Righi
20
55.56%
1
50.00%
Alexey Dobriyan
16
44.44%
1
50.00%
Total
36
100.00%
2
100.00%



static int proc_tgid_io_accounting(struct seq_file *m, struct pid_namespace *ns,
				   struct pid *pid, struct task_struct *task)
{
	return do_io_accounting(task, m, 1);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrea Righi
20
55.56%
1
50.00%
Alexey Dobriyan
16
44.44%
1
50.00%
Total
36
100.00%
2
100.00%

#endif /* CONFIG_TASK_IO_ACCOUNTING */

#ifdef CONFIG_USER_NS


static int proc_id_map_open(struct inode *inode, struct file *file,
	const struct seq_operations *seq_ops)
{
	struct user_namespace *ns = NULL;
	struct task_struct *task;
	struct seq_file *seq;
	int ret = -EINVAL;

	task = get_proc_task(inode);
	if (task) {
		rcu_read_lock();
		ns = get_user_ns(task_cred_xxx(task, user_ns));
		rcu_read_unlock();
		put_task_struct(task);
	}
	if (!ns)
		goto err;

	ret = seq_open(file, seq_ops);
	if (ret)
		goto err_put_ns;

	seq = file->private_data;
	seq->private = ns;

	return 0;
err_put_ns:
	put_user_ns(ns);
err:
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
131
99.24%
1
50.00%
Fabian Frederick
1
0.76%
1
50.00%
Total
132
100.00%
2
100.00%



static int proc_id_map_release(struct inode *inode, struct file *file)
{
	struct seq_file *seq = file->private_data;
	struct user_namespace *ns = seq->private;
	put_user_ns(ns);
	return seq_release(inode, file);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
47
100.00%
1
100.00%
Total
47
100.00%
1
100.00%



static int proc_uid_map_open(struct inode *inode, struct file *file)
{
	return proc_id_map_open(inode, file, &proc_uid_seq_operations);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
27
100.00%
1
100.00%
Total
27
100.00%
1
100.00%



static int proc_gid_map_open(struct inode *inode, struct file *file)
{
	return proc_id_map_open(inode, file, &proc_gid_seq_operations);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
27
100.00%
1
100.00%
Total
27
100.00%
1
100.00%



static int proc_projid_map_open(struct inode *inode, struct file *file)
{
	return proc_id_map_open(inode, file, &proc_projid_seq_operations);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
27
100.00%
1
100.00%
Total
27
100.00%
1
100.00%


static const struct file_operations proc_uid_map_operations = {
	.open		= proc_uid_map_open,
	.write		= proc_uid_map_write,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= proc_id_map_release,
};


static const struct file_operations proc_gid_map_operations = {
	.open		= proc_gid_map_open,
	.write		= proc_gid_map_write,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= proc_id_map_release,
};


static const struct file_operations proc_projid_map_operations = {
	.open		= proc_projid_map_open,
	.write		= proc_projid_map_write,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= proc_id_map_release,
};



static int proc_setgroups_open(struct inode *inode, struct file *file)
{
	struct user_namespace *ns = NULL;
	struct task_struct *task;
	int ret;

	ret = -ESRCH;
	task = get_proc_task(inode);
	if (task) {
		rcu_read_lock();
		ns = get_user_ns(task_cred_xxx(task, user_ns));
		rcu_read_unlock();
		put_task_struct(task);
	}
	if (!ns)
		goto err;

	if (file->f_mode & FMODE_WRITE) {
		ret = -EACCES;
		if (!ns_capable(ns, CAP_SYS_ADMIN))
			goto err_put_ns;
	}

	ret = single_open(file, &proc_setgroups_show, ns);
	if (ret)
		goto err_put_ns;

	return 0;
err_put_ns:
	put_user_ns(ns);
err:
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
142
100.00%
1
100.00%
Total
142
100.00%
1
100.00%



static int proc_setgroups_release(struct inode *inode, struct file *file)
{
	struct seq_file *seq = file->private_data;
	struct user_namespace *ns = seq->private;
	int ret = single_release(inode, file);
	put_user_ns(ns);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
52
100.00%
1
100.00%
Total
52
100.00%
1
100.00%


static const struct file_operations proc_setgroups_operations = {
	.open		= proc_setgroups_open,
	.write		= proc_setgroups_write,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= proc_setgroups_release,
};
#endif /* CONFIG_USER_NS */



static int proc_pid_personality(struct seq_file *m, struct pid_namespace *ns,
				struct pid *pid, struct task_struct *task)
{
	int err = lock_trace(task);
	if (!err) {
		seq_printf(m, "%08x\n", task->personality);
		unlock_trace(task);
	}
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Kees Cook
39
65.00%
1
50.00%
Al Viro
21
35.00%
1
50.00%
Total
60
100.00%
2
100.00%

#ifdef CONFIG_LIVEPATCH


static int proc_pid_patch_state(struct seq_file *m, struct pid_namespace *ns,
				struct pid *pid, struct task_struct *task)
{
	seq_printf(m, "%d\n", task->patch_state);
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Josh Poimboeuf
40
100.00%
1
100.00%
Total
40
100.00%
1
100.00%

#endif /* CONFIG_LIVEPATCH */

/*
 * Thread groups
 */

static const struct file_operations proc_task_operations;

static const struct inode_operations proc_task_inode_operations;


static const struct pid_entry tgid_base_stuff[] = {
	DIR("task",       S_IRUGO|S_IXUGO, proc_task_inode_operations, proc_task_operations),
	DIR("fd",         S_IRUSR|S_IXUSR, proc_fd_inode_operations, proc_fd_operations),
	DIR("map_files",  S_IRUSR|S_IXUSR, proc_map_files_inode_operations, proc_map_files_operations),
	DIR("fdinfo",     S_IRUSR|S_IXUSR, proc_fdinfo_inode_operations, proc_fdinfo_operations),
	DIR("ns",	  S_IRUSR|S_IXUGO, proc_ns_dir_inode_operations, proc_ns_dir_operations),
#ifdef CONFIG_NET
	DIR("net",        S_IRUGO|S_IXUGO, proc_net_inode_operations, proc_net_operations),
#endif
	REG("environ",    S_IRUSR, proc_environ_operations),
	REG("auxv",       S_IRUSR, proc_auxv_operations),
	ONE("status",     S_IRUGO, proc_pid_status),
	ONE("personality", S_IRUSR, proc_pid_personality),
	ONE("limits",	  S_IRUGO, proc_pid_limits),
#ifdef CONFIG_SCHED_DEBUG
	REG("sched",      S_IRUGO|S_IWUSR, proc_pid_sched_operations),
#endif
#ifdef CONFIG_SCHED_AUTOGROUP
	REG("autogroup",  S_IRUGO|S_IWUSR, proc_pid_sched_autogroup_operations),
#endif
	REG("comm",      S_IRUGO|S_IWUSR, proc_pid_set_comm_operations),
#ifdef CONFIG_HAVE_ARCH_TRACEHOOK
	ONE("syscall",    S_IRUSR, proc_pid_syscall),
#endif
	REG("cmdline",    S_IRUGO, proc_pid_cmdline_ops),
	ONE("stat",       S_IRUGO, proc_tgid_stat),
	ONE("statm",      S_IRUGO, proc_pid_statm),
	REG("maps",       S_IRUGO, proc_pid_maps_operations),
#ifdef CONFIG_NUMA
	REG("numa_maps",  S_IRUGO, proc_pid_numa_maps_operations),
#endif
	REG("mem",        S_IRUSR|S_IWUSR, proc_mem_operations),
	LNK("cwd",        proc_cwd_link),
	LNK("root",       proc_root_link),
	LNK("exe",        proc_exe_link),
	REG("mounts",     S_IRUGO, proc_mounts_operations),
	REG("mountinfo",  S_IRUGO, proc_mountinfo_operations),
	REG("mountstats", S_IRUSR, proc_mountstats_operations),
#ifdef CONFIG_PROC_PAGE_MONITOR
	REG("clear_refs", S_IWUSR, proc_clear_refs_operations),
	REG("smaps",      S_IRUGO, proc_pid_smaps_operations),
	REG("smaps_rollup", S_IRUGO, proc_pid_smaps_rollup_operations),
	REG("pagemap",    S_IRUSR, proc_pagemap_operations),
#endif
#ifdef CONFIG_SECURITY
	DIR("attr",       S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
#endif
#ifdef CONFIG_KALLSYMS
	ONE("wchan",      S_IRUGO, proc_pid_wchan),
#endif
#ifdef CONFIG_STACKTRACE
	ONE("stack",      S_IRUSR, proc_pid_stack),
#endif
#ifdef CONFIG_SCHED_INFO
	ONE("schedstat",  S_IRUGO, proc_pid_schedstat),
#endif
#ifdef CONFIG_LATENCYTOP
	REG("latency",  S_IRUGO, proc_lstats_operations),
#endif
#ifdef CONFIG_PROC_PID_CPUSET
	ONE("cpuset",     S_IRUGO, proc_cpuset_show),
#endif
#ifdef CONFIG_CGROUPS
	ONE("cgroup",  S_IRUGO, proc_cgroup_show),
#endif
	ONE("oom_score",  S_IRUGO, proc_oom_score),
	REG("oom_adj",    S_IRUGO|S_IWUSR, proc_oom_adj_operations),
	REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
#ifdef CONFIG_AUDITSYSCALL
	REG("loginuid",   S_IWUSR|S_IRUGO, proc_loginuid_operations),
	REG("sessionid",  S_IRUGO, proc_sessionid_operations),
#endif
#ifdef CONFIG_FAULT_INJECTION
	REG("make-it-fail", S_IRUGO|S_IWUSR, proc_fault_inject_operations),
	REG("fail-nth", 0644, proc_fail_nth_operations),
#endif
#ifdef CONFIG_ELF_CORE
	REG("coredump_filter", S_IRUGO|S_IWUSR, proc_coredump_filter_operations),
#endif
#ifdef CONFIG_TASK_IO_ACCOUNTING
	ONE("io",	S_IRUSR, proc_tgid_io_accounting),
#endif
#ifdef CONFIG_USER_NS
	REG("uid_map",    S_IRUGO|S_IWUSR, proc_uid_map_operations),
	REG("gid_map",    S_IRUGO|S_IWUSR, proc_gid_map_operations),
	REG("projid_map", S_IRUGO|S_IWUSR, proc_projid_map_operations),
	REG("setgroups",  S_IRUGO|S_IWUSR, proc_setgroups_operations),
#endif
#if defined(CONFIG_CHECKPOINT_RESTORE) && defined(CONFIG_POSIX_TIMERS)
	REG("timers",	  S_IRUGO, proc_timers_operations),
#endif
	REG("timerslack_ns", S_IRUGO|S_IWUGO, proc_pid_set_timerslack_ns_operations),
#ifdef CONFIG_LIVEPATCH
	ONE("patch_state",  S_IRUSR, proc_pid_patch_state),
#endif
};



static int proc_tgid_base_readdir(struct file *file, struct dir_context *ctx)
{
	return proc_pident_readdir(file, ctx,
				   tgid_base_stuff, ARRAY_SIZE(tgid_base_stuff));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
22
70.97%
1
33.33%
Al Viro
6
19.35%
1
33.33%
Eric W. Biedermann
3
9.68%
1
33.33%
Total
31
100.00%
3
100.00%


static const struct file_operations proc_tgid_base_operations = {
	.read		= generic_read_dir,
	.iterate_shared	= proc_tgid_base_readdir,
	.llseek		= generic_file_llseek,
};



static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
	return proc_pident_lookup(dir, dentry,
				  tgid_base_stuff, ARRAY_SIZE(tgid_base_stuff));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
20
54.05%
2
40.00%
Eric W. Biedermann
14
37.84%
2
40.00%
Al Viro
3
8.11%
1
20.00%
Total
37
100.00%
5
100.00%


static const struct inode_operations proc_tgid_base_inode_operations = {
	.lookup		= proc_tgid_base_lookup,
	.getattr	= pid_getattr,
	.setattr	= proc_setattr,
	.permission	= proc_pid_permission,
};



static void proc_flush_task_mnt(struct vfsmount *mnt, pid_t pid, pid_t tgid)
{
	struct dentry *dentry, *leader, *dir;
	char buf[10 + 1];
	struct qstr name;

	name.name = buf;
	name.len = snprintf(buf, sizeof(buf), "%u", pid);
	/* no ->d_hash() rejects on procfs */
	dentry = d_hash_and_lookup(mnt->mnt_root, &name);
	if (dentry) {
		d_invalidate(dentry);
		dput(dentry);
	}

	if (pid == tgid)
		return;

	name.name = buf;
	name.len = snprintf(buf, sizeof(buf), "%u", tgid);
	leader = d_hash_and_lookup(mnt->mnt_root, &name);
	if (!leader)
		goto out;

	name.name = "task";
	name.len = strlen(name.name);
	dir = d_hash_and_lookup(leader, &name);
	if (!dir)
		goto out_put_leader;

	name.name = buf;
	name.len = snprintf(buf, sizeof(buf), "%u", pid);
	dentry = d_hash_and_lookup(dir, &name);
	if (dentry) {
		d_invalidate(dentry);
		dput(dentry);
	}

	dput(dir);
out_put_leader:
	dput(leader);
out:
	return;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
199
81.56%
2
25.00%
Linus Torvalds (pre-git)
18
7.38%
1
12.50%
Pavel Emelyanov
12
4.92%
1
12.50%
Oleg Nesterov
7
2.87%
1
12.50%
Alexey Dobriyan
6
2.46%
1
12.50%
Albert D. Cahalan
1
0.41%
1
12.50%
Al Viro
1
0.41%
1
12.50%
Total
244
100.00%
8
100.00%

/**
 * proc_flush_task -  Remove dcache entries for @task from the /proc dcache.
 * @task: task that should be flushed.
 *
 * When flushing dentries from proc, one needs to flush them from global
 * proc (proc_mnt) and from all the namespaces' procs this task was seen
 * in. This call is supposed to do all of this job.
 *
 * Looks in the dcache for
 * /proc/@pid
 * /proc/@tgid/task/@pid
 * if either directory is present flushes it and all of it'ts children
 * from the dcache.
 *
 * It is safe and reasonable to cache /proc entries for a task until
 * that task exits.  After that they just clog up the dcache with
 * useless entries, possibly causing useful dcache entries to be
 * flushed instead.  This routine is proved to flush those useless
 * dcache entries at process exit time.
 *
 * NOTE: This routine is just an optimization so it does not guarantee
 *       that no dcache entries will exist at process exit time it
 *       just makes it very unlikely that any will persist.
 */



void proc_flush_task(struct task_struct *task)
{
	int i;
	struct pid *pid, *tgid;
	struct upid *upid;

	pid = task_pid(task);
	tgid = task_tgid(task);

	for (i = 0; i <= pid->level; i++) {
		upid = &pid->numbers[i];
		proc_flush_task_mnt(upid->ns->proc_mnt, upid->nr,
					tgid->numbers[i].nr);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Pavel Emelyanov
87
97.75%
2
66.67%
Eric W. Biedermann
2
2.25%
1
33.33%
Total
89
100.00%
3
100.00%



static int proc_pid_instantiate(struct inode *dir,
				   struct dentry * dentry,
				   struct task_struct *task, const void *ptr)
{
	struct inode *inode;

	inode = proc_pid_make_inode(dir->i_sb, task, S_IFDIR | S_IRUGO | S_IXUGO);
	if (!inode)
		goto out;

	inode->i_op = &proc_tgid_base_inode_operations;
	inode->i_fop = &proc_tgid_base_operations;
	inode->i_flags|=S_IMMUTABLE;

	set_nlink(inode, nlink_tgid);

	d_set_d_op(dentry, &pid_dentry_operations);

	d_add(dentry, inode);
	/* Close the race of the process dying before we return the dentry */
	if (pid_revalidate(dentry, 0))
		return 0;
out:
	return -ENOENT;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
93
79.49%
1
11.11%
Al Viro
7
5.98%
2
22.22%
Andreas Gruenbacher
6
5.13%
1
11.11%
Miklos Szeredi
4
3.42%
1
11.11%
Nicholas Piggin
4
3.42%
1
11.11%
Eric Dumazet
1
0.85%
1
11.11%
Alexey Dobriyan
1
0.85%
1
11.11%
Adrian Bunk
1
0.85%
1
11.11%
Total
117
100.00%
9
100.00%



struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
	int result = -ENOENT;
	struct task_struct *task;
	unsigned tgid;
	struct pid_namespace *ns;

	tgid = name_to_int(&dentry->d_name);
	if (tgid == ~0U)
		goto out;

	ns = dentry->d_sb->s_fs_info;
	rcu_read_lock();
	task = find_task_by_pid_ns(tgid, ns);
	if (task)
		get_task_struct(task);
	rcu_read_unlock();
	if (!task)
		goto out;

	result = proc_pid_instantiate(dir, dentry, task, NULL);
	put_task_struct(task);
out:
	return ERR_PTR(result);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
74
58.73%
4
30.77%
Pavel Emelyanov
16
12.70%
1
7.69%
Andrew Morton
11
8.73%
1
7.69%
Linus Torvalds (pre-git)
9
7.14%
1
7.69%
Al Viro
8
6.35%
3
23.08%
Alexey Dobriyan
5
3.97%
2
15.38%
Jan Blunck
3
2.38%
1
7.69%
Total
126
100.00%
13
100.00%

/*
 * Find the first task with tgid >= tgid
 *
 */

struct tgid_iter {
	
unsigned int tgid;
	
struct task_struct *task;
};


static struct tgid_iter next_tgid(struct pid_namespace *ns, struct tgid_iter iter)
{
	struct pid *pid;

	if (iter.task)
		put_task_struct(iter.task);
	rcu_read_lock();
retry:
	iter.task = NULL;
	pid = find_ge_pid(iter.tgid, ns);
	if (pid) {
		iter.tgid = pid_nr_ns(pid, ns);
		iter.task = pid_task(pid, PIDTYPE_PID);
		/* What we to know is if the pid we have find is the
                 * pid of a thread_group_leader.  Testing for task
                 * being a thread_group_leader is the obvious thing
                 * todo but there is a window when it fails, due to
                 * the pid transfer logic in de_thread.
                 *
                 * So we perform the straight forward test of seeing
                 * if the pid we have found is the pid of a thread
                 * group leader, and don't worry if the task we have
                 * found doesn't happen to be a thread group leader.
                 * As we don't care in the case of readdir.
                 */
		if (!iter.task || !has_group_leader_pid(iter.task)) {
			iter.tgid += 1;
			goto retry;
		}
		get_task_struct(iter.task);
	}
	rcu_read_unlock();
	return iter;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
102
82.26%
3
42.86%
Pavel Emelyanov
11
8.87%
2
28.57%
Andrew Morton
10
8.06%
1
14.29%
Ingo Molnar
1
0.81%
1
14.29%
Total
124
100.00%
7
100.00%


#define TGID_OFFSET (FIRST_PROCESS_ENTRY + 2)

/* for the /proc/ directory itself, after non-process stuff has been done */


int proc_pid_readdir(struct file *file, struct dir_context *ctx)
{
	struct tgid_iter iter;
	struct pid_namespace *ns = file_inode(file)->i_sb->s_fs_info;
	loff_t pos = ctx->pos;

	if (pos >= PID_MAX_LIMIT + TGID_OFFSET)
		return 0;

	if (pos == TGID_OFFSET - 2) {
		struct inode *inode = d_inode(ns->proc_self);
		if (!dir_emit(ctx, "self", 4, inode->i_ino, DT_LNK))
			return 0;
		ctx->pos = pos = pos + 1;
	}
	if (pos == TGID_OFFSET - 1) {
		struct inode *inode = d_inode(ns->proc_thread_self);
		if (!dir_emit(ctx, "thread-self", 11, inode->i_ino, DT_LNK))
			return 0;
		ctx->pos = pos = pos + 1;
	}
	iter.tgid = pos - TGID_OFFSET;
	iter.task = NULL;
	for (iter = next_tgid(ns, iter);
	     iter.task;
	     iter.tgid += 1, iter = next_tgid(ns, iter)) {
		char name[10 + 1];
		int len;

		cond_resched();
		if (!has_pid_permissions(ns, iter.task, HIDEPID_INVISIBLE))
			continue;

		len = snprintf(name, sizeof(name), "%u", iter.tgid);
		ctx->pos = iter.tgid + TGID_OFFSET;
		if (!proc_fill_cache(file, ctx, name, len,
				     proc_pid_instantiate, iter.task, NULL)) {
			put_task_struct(iter.task);
			return 0;
		}
	}
	ctx->pos = PID_MAX_LIMIT + TGID_OFFSET;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
127
41.64%
4
22.22%
Al Viro
124
40.66%
4
22.22%
Linus Torvalds (pre-git)
17
5.57%
3
16.67%
Vasiliy Kulikov
15
4.92%
1
5.56%
Linus Torvalds
6
1.97%
1
5.56%
David Howells
6
1.97%
1
5.56%
Alexey Dobriyan
4
1.31%
1
5.56%
Eric Dumazet
3
0.98%
1
5.56%
Pavel Emelyanov
2
0.66%
1
5.56%
Lafcadio Wluiki
1
0.33%
1
5.56%
Total
305
100.00%
18
100.00%

/*
 * proc_tid_comm_permission is a special permission function exclusively
 * used for the node /proc/<pid>/task/<tid>/comm.
 * It bypasses generic permission checks in the case where a task of the same
 * task group attempts to access the node.
 * The rationale behind this is that glibc and bionic access this node for
 * cross thread naming (pthread_set/getname_np(!self)). However, if
 * PR_SET_DUMPABLE gets set to 0 this node among others becomes uid=0 gid=0,
 * which locks out the cross thread naming implementation.
 * This function makes sure that the node is always accessible for members of
 * same thread group.
 */


static int proc_tid_comm_permission(struct inode *inode, int mask)
{
	bool is_same_tgroup;
	struct task_struct *task;

	task = get_proc_task(inode);
	if (!task)
		return -ESRCH;
	is_same_tgroup = same_thread_group(current, task);
	put_task_struct(task);

	if (likely(is_same_tgroup && !(mask & MAY_EXEC))) {
		/* This file (/proc/<pid>/task/<tid>/comm) can always be
                 * read or written by the members of the corresponding
                 * thread group.
                 */
		return 0;
	}

	return generic_permission(inode, mask);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Janis Danisevskis
80
100.00%
1
100.00%
Total
80
100.00%
1
100.00%


static const struct inode_operations proc_tid_comm_inode_operations = {
		.permission = proc_tid_comm_permission,
};

/*
 * Tasks
 */

static const struct pid_entry tid_base_stuff[] = {
	DIR("fd",        S_IRUSR|S_IXUSR, proc_fd_inode_operations, proc_fd_operations),
	DIR("fdinfo",    S_IRUSR|S_IXUSR, proc_fdinfo_inode_operations, proc_fdinfo_operations),
	DIR("ns",	 S_IRUSR|S_IXUGO, proc_ns_dir_inode_operations, proc_ns_dir_operations),
#ifdef CONFIG_NET
	DIR("net",        S_IRUGO|S_IXUGO, proc_net_inode_operations, proc_net_operations),
#endif
	REG("environ",   S_IRUSR, proc_environ_operations),
	REG("auxv",      S_IRUSR, proc_auxv_operations),
	ONE("status",    S_IRUGO, proc_pid_status),
	ONE("personality", S_IRUSR, proc_pid_personality),
	ONE("limits",	 S_IRUGO, proc_pid_limits),
#ifdef CONFIG_SCHED_DEBUG
	REG("sched",     S_IRUGO|S_IWUSR, proc_pid_sched_operations),
#endif
	NOD("comm",      S_IFREG|S_IRUGO|S_IWUSR,
			 &proc_tid_comm_inode_operations,
			 &proc_pid_set_comm_operations, {}),
#ifdef CONFIG_HAVE_ARCH_TRACEHOOK
	ONE("syscall",   S_IRUSR, proc_pid_syscall),
#endif
	REG("cmdline",   S_IRUGO, proc_pid_cmdline_ops),
	ONE("stat",      S_IRUGO, proc_tid_stat),
	ONE("statm",     S_IRUGO, proc_pid_statm),
	REG("maps",      S_IRUGO, proc_tid_maps_operations),
#ifdef CONFIG_PROC_CHILDREN
	REG("children",  S_IRUGO, proc_tid_children_operations),
#endif
#ifdef CONFIG_NUMA
	REG("numa_maps", S_IRUGO, proc_tid_numa_maps_operations),
#endif
	REG("mem",       S_IRUSR|S_IWUSR, proc_mem_operations),
	LNK("cwd",       proc_cwd_link),
	LNK("root",      proc_root_link),
	LNK("exe",       proc_exe_link),
	REG("mounts",    S_IRUGO, proc_mounts_operations),
	REG("mountinfo",  S_IRUGO, proc_mountinfo_operations),
#ifdef CONFIG_PROC_PAGE_MONITOR
	REG("clear_refs", S_IWUSR, proc_clear_refs_operations),
	REG("smaps",     S_IRUGO, proc_tid_smaps_operations),
	REG("smaps_rollup", S_IRUGO, proc_pid_smaps_rollup_operations),
	REG("pagemap",    S_IRUSR, proc_pagemap_operations),
#endif
#ifdef CONFIG_SECURITY
	DIR("attr",      S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
#endif
#ifdef CONFIG_KALLSYMS
	ONE("wchan",     S_IRUGO, proc_pid_wchan),
#endif
#ifdef CONFIG_STACKTRACE
	ONE("stack",      S_IRUSR, proc_pid_stack),
#endif
#ifdef CONFIG_SCHED_INFO
	ONE("schedstat", S_IRUGO, proc_pid_schedstat),
#endif
#ifdef CONFIG_LATENCYTOP
	REG("latency",  S_IRUGO, proc_lstats_operations),
#endif
#ifdef CONFIG_PROC_PID_CPUSET
	ONE("cpuset",    S_IRUGO, proc_cpuset_show),
#endif
#ifdef CONFIG_CGROUPS
	ONE("cgroup",  S_IRUGO, proc_cgroup_show),
#endif
	ONE("oom_score", S_IRUGO, proc_oom_score),
	REG("oom_adj",   S_IRUGO|S_IWUSR, proc_oom_adj_operations),
	REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
#ifdef CONFIG_AUDITSYSCALL
	REG("loginuid",  S_IWUSR|S_IRUGO, proc_loginuid_operations),
	REG("sessionid",  S_IRUGO, proc_sessionid_operations),
#endif
#ifdef CONFIG_FAULT_INJECTION
	REG("make-it-fail", S_IRUGO|S_IWUSR, proc_fault_inject_operations),
	REG("fail-nth", 0644, proc_fail_nth_operations),
#endif
#ifdef CONFIG_TASK_IO_ACCOUNTING
	ONE("io",	S_IRUSR, proc_tid_io_accounting),
#endif
#ifdef CONFIG_USER_NS
	REG("uid_map",    S_IRUGO|S_IWUSR, proc_uid_map_operations),
	REG("gid_map",    S_IRUGO|S_IWUSR, proc_gid_map_operations),
	REG("projid_map", S_IRUGO|S_IWUSR, proc_projid_map_operations),
	REG("setgroups",  S_IRUGO|S_IWUSR, proc_setgroups_operations),
#endif
#ifdef CONFIG_LIVEPATCH
	ONE("patch_state",  S_IRUSR, proc_pid_patch_state),
#endif
};



static int proc_tid_base_readdir(struct file *file, struct dir_context *ctx)
{
	return proc_pident_readdir(file, ctx,
				   tid_base_stuff, ARRAY_SIZE(tid_base_stuff));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
19
61.29%
4
66.67%
Al Viro
6
19.35%
1
16.67%
Albert D. Cahalan
6
19.35%
1
16.67%
Total
31
100.00%
6
100.00%



static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
	return proc_pident_lookup(dir, dentry,
				  tid_base_stuff, ARRAY_SIZE(tid_base_stuff));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
31
83.78%
2
50.00%
Albert D. Cahalan
3
8.11%
1
25.00%
Al Viro
3
8.11%
1
25.00%
Total
37
100.00%
4
100.00%


static const struct file_operations proc_tid_base_operations = {
	.read		= generic_read_dir,
	.iterate_shared	= proc_tid_base_readdir,
	.llseek		= generic_file_llseek,
};


static const struct inode_operations proc_tid_base_inode_operations = {
	.lookup		= proc_tid_base_lookup,
	.getattr	= pid_getattr,
	.setattr	= proc_setattr,
};



static int proc_task_instantiate(struct inode *dir,
	struct dentry *dentry, struct task_struct *task, const void *ptr)
{
	struct inode *inode;
	inode = proc_pid_make_inode(dir->i_sb, task, S_IFDIR | S_IRUGO | S_IXUGO);

	if (!inode)
		goto out;
	inode->i_op = &proc_tid_base_inode_operations;
	inode->i_fop = &proc_tid_base_operations;
	inode->i_flags|=S_IMMUTABLE;

	set_nlink(inode, nlink_tid);

	d_set_d_op(dentry, &pid_dentry_operations);

	d_add(dentry, inode);
	/* Close the race of the process dying before we return the dentry */
	if (pid_revalidate(dentry, 0))
		return 0;
out:
	return -ENOENT;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
94
80.34%
1
12.50%
Al Viro
7
5.98%
2
25.00%
Andreas Gruenbacher
6
5.13%
1
12.50%
Nicholas Piggin
4
3.42%
1
12.50%
Miklos Szeredi
4
3.42%
1
12.50%
Alexey Dobriyan
1
0.85%
1
12.50%
Eric Dumazet
1
0.85%
1
12.50%
Total
117
100.00%
8
100.00%



static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
	int result = -ENOENT;
	struct task_struct *task;
	struct task_struct *leader = get_proc_task(dir);
	unsigned tid;
	struct pid_namespace *ns;

	if (!leader)
		goto out_no_task;

	tid = name_to_int(&dentry->d_name);
	if (tid == ~0U)
		goto out;

	ns = dentry->d_sb->s_fs_info;
	rcu_read_lock();
	task = find_task_by_pid_ns(tid, ns);
	if (task)
		get_task_struct(task);
	rcu_read_unlock();
	if (!task)
		goto out;
	if (!same_thread_group(leader, task))
		goto out_drop_task;

	result = proc_task_instantiate(dir, dentry, task, NULL);
out_drop_task:
	put_task_struct(task);
out:
	put_task_struct(leader);
out_no_task:
	return ERR_PTR(result);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
115
68.86%
4
36.36%
Pavel Emelyanov
21
12.57%
2
18.18%
Albert D. Cahalan
20
11.98%
1
9.09%
Al Viro
7
4.19%
2
18.18%
Alexey Dobriyan
3
1.80%
1
9.09%
Manfred Spraul
1
0.60%
1
9.09%
Total
167
100.00%
11
100.00%

/*
 * Find the first tid of a thread group to return to user space.
 *
 * Usually this is just the thread group leader, but if the users
 * buffer was too small or there was a seek into the middle of the
 * directory we have more work todo.
 *
 * In the case of a short read we start with find_task_by_pid.
 *
 * In the case of a seek we start with the leader and walk nr
 * threads past it.
 */


static struct task_struct *first_tid(struct pid *pid, int tid, loff_t f_pos,
					struct pid_namespace *ns)
{
	struct task_struct *pos, *task;
	unsigned long nr = f_pos;

	if (nr != f_pos)	/* 32bit overflow? */
		return NULL;

	rcu_read_lock();
	task = pid_task(pid, PIDTYPE_PID);
	if (!task)
		goto fail;

	/* Attempt to start with the tid of a thread */
	if (tid && nr) {
		pos = find_task_by_pid_ns(tid, ns);
		if (pos && same_thread_group(pos, task))
			goto found;
	}

	/* If nr exceeds the number of threads there is nothing todo */
	if (nr >= get_nr_threads(task))
		goto fail;

	/* If we haven't found our starting place yet start
         * with the leader and walk nr threads forward.
         */
	pos = task = task->group_leader;
	do {
		if (!nr--)
			goto found;
	} while_each_thread(task, pos);
Contributors
Person
Tokens
Prop
Commits
CommitProp
Oleg Nesterov
78
56.52%
5
55.56%
Eric W. Biedermann
52
37.68%
3
33.33%
Pavel Emelyanov
8
5.80%
1
11.11%
Total
138
100.00%
9
100.00%

fail:
	pos = NULL;
	goto out;
found:
	get_task_struct(pos);
out:
	rcu_read_unlock();
	return pos;
}

/*
 * Find the next thread in the thread list.
 * Return NULL if there is an error or no next thread.
 *
 * The reference to the input task_struct is released.
 */


static struct task_struct *next_tid(struct task_struct *start)
{
	struct task_struct *pos = NULL;
	rcu_read_lock();
	if (pid_alive(start)) {
		pos = next_thread(start);
		if (thread_group_leader(pos))
			pos = NULL;
		else
			get_task_struct(pos);
	}
	rcu_read_unlock();
	put_task_struct(start);
	return pos;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
43
64.18%
2
25.00%
Oleg Nesterov
11
16.42%
2
25.00%
Linus Torvalds (pre-git)
8
11.94%
1
12.50%
Albert D. Cahalan
3
4.48%
1
12.50%
Andrew Morton
1
1.49%
1
12.50%
Manfred Spraul
1
1.49%
1
12.50%
Total
67
100.00%
8
100.00%

/* for the /proc/TGID/task/ directories */


static int proc_task_readdir(struct file *file, struct dir_context *ctx)
{
	struct inode *inode = file_inode(file);
	struct task_struct *task;
	struct pid_namespace *ns;
	int tid;

	if (proc_inode_is_dead(inode))
		return -ENOENT;

	if (!dir_emit_dots(file, ctx))
		return 0;

	/* f_version caches the tgid value that the last readdir call couldn't
         * return. lseek aka telldir automagically resets f_version to 0.
         */
	ns = inode->i_sb->s_fs_info;
	tid = (int)file->f_version;
	file->f_version = 0;
	for (task = first_tid(proc_pid(inode), tid, ctx->pos - 2, ns);
	     task;
	     task = next_tid(task), ctx->pos++) {
		char name[10 + 1];
		int len;
		tid = task_pid_nr_ns(task, ns);
		len = snprintf(name, sizeof(name), "%u", tid);
		if (!proc_fill_cache(file, ctx, name, len,
				proc_task_instantiate, task, NULL)) {
			/* returning this tgid failed, save it as the first
                         * pid for the next readir call */
			file->f_version = (u64)tid;
			put_task_struct(task);
			break;
		}
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Al Viro
58
28.71%
2
14.29%
Eric W. Biedermann
53
26.24%
2
14.29%
Linus Torvalds (pre-git)
36
17.82%
3
21.43%
Pavel Emelyanov
18
8.91%
1
7.14%
Oleg Nesterov
15
7.43%
1
7.14%
Albert D. Cahalan
6
2.97%
1
7.14%
Mathieu Desnoyers
6
2.97%
1
7.14%
Guillaume Chazarain
4
1.98%
1
7.14%
Alexey Dobriyan
4
1.98%
1
7.14%
Zhang Le
2
0.99%
1
7.14%
Total
202
100.00%
14
100.00%



static int proc_task_getattr(const struct path *path, struct kstat *stat,
			     u32 request_mask, unsigned int query_flags)
{
	struct inode *inode = d_inode(path->dentry);
	struct task_struct *p = get_proc_task(inode);
	generic_fillattr(inode, stat);

	if (p) {
		stat->nlink += get_nr_threads(p);
		put_task_struct(p);
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
61
80.26%
2
50.00%
David Howells
15
19.74%
2
50.00%
Total
76
100.00%
4
100.00%


static const struct inode_operations proc_task_inode_operations = {
	.lookup		= proc_task_lookup,
	.getattr	= proc_task_getattr,
	.setattr	= proc_setattr,
	.permission	= proc_pid_permission,
};


static const struct file_operations proc_task_operations = {
	.read		= generic_read_dir,
	.iterate_shared	= proc_task_readdir,
	.llseek		= generic_file_llseek,
};



void __init set_proc_pid_nlink(void)
{
	nlink_tid = pid_entry_nlink(tid_base_stuff, ARRAY_SIZE(tid_base_stuff));
	nlink_tgid = pid_entry_nlink(tgid_base_stuff, ARRAY_SIZE(tgid_base_stuff));
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Alexey Dobriyan
32
100.00%
1
100.00%
Total
32
100.00%
1
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Eric W. Biedermann
4653
28.16%
36
9.78%
Alexey Dobriyan
1408
8.52%
37
10.05%
Al Viro
1024
6.20%
33
8.97%
Pavel Emelyanov
781
4.73%
9
2.45%
David Rientjes
676
4.09%
9
2.45%
Cyrill V. Gorcunov
666
4.03%
3
0.82%
John Stultz
626
3.79%
5
1.36%
Michal Hocko
416
2.52%
4
1.09%
Neil Horman
389
2.35%
1
0.27%
Oleg Nesterov
359
2.17%
13
3.53%
Akinobu Mita
359
2.17%
6
1.63%
Hidehiro Kawai
335
2.03%
1
0.27%
Mike Galbraith
325
1.97%
1
0.27%
Linus Torvalds (pre-git)
319
1.93%
16
4.35%
Andrew Morton
303
1.83%
12
3.26%
Arjan van de Ven
261
1.58%
3
0.82%
Ingo Molnar
253
1.53%
10
2.72%
Vasiliy Kulikov
251
1.52%
3
0.82%
James Pearson
202
1.22%
1
0.27%
Linus Torvalds
198
1.20%
16
4.35%
Ken Chen
161
0.97%
2
0.54%
Dmitriy Vyukov
144
0.87%
1
0.27%
Andrea Righi
144
0.87%
4
1.09%
Eric Paris
139
0.84%
3
0.82%
Roland McGrath
137
0.83%
2
0.54%
David Howells
122
0.74%
6
1.63%
Miklos Szeredi
121
0.73%
3
0.82%
Janis Danisevskis
106
0.64%
1
0.27%
Albert D. Cahalan
101
0.61%
2
0.54%
Andrea Arcangeli
94
0.57%
2
0.54%
Matt Helsley
83
0.50%
1
0.27%
Américo Wang
83
0.50%
1
0.27%
Josh Poimboeuf
76
0.46%
1
0.27%
Serge E. Hallyn
72
0.44%
2
0.54%
Vegard Nossum
65
0.39%
3
0.82%
Calvin Owens
59
0.36%
1
0.27%
Kees Cook
57
0.34%
3
0.82%
Christoph Hellwig
56
0.34%
7
1.90%
Arnd Bergmann
55
0.33%
2
0.54%
Hiroshi Shimamoto
52
0.31%
4
1.09%
Andreas Gruenbacher
51
0.31%
1
0.27%
Joe Perches
50
0.30%
2
0.54%
Nicholas Piggin
47
0.28%
2
0.54%
Djalal Harouni
46
0.28%
4
1.09%
Mateusz Guzik
36
0.22%
2
0.54%
Alexander Beregalov
35
0.21%
1
0.27%
Hugh Dickins
29
0.18%
1
0.27%
Paul Menage
29
0.18%
2
0.54%
Chuck Lever
26
0.16%
1
0.27%
Jan Blunck
25
0.15%
3
0.82%
Naveen N. Rao
20
0.12%
1
0.27%
Nico Pitre
20
0.12%
1
0.27%
Stephen D. Smalley
19
0.11%
2
0.54%
Eric Dumazet
19
0.11%
2
0.54%
Daniel Colascione
18
0.11%
1
0.27%
Matt Mackall
16
0.10%
2
0.54%
Ram Pai
16
0.10%
1
0.27%
Dave Jones
15
0.09%
2
0.54%
Aleksa Sarai
13
0.08%
1
0.27%
Robert Love
13
0.08%
1
0.27%
Paul E. McKenney
11
0.07%
1
0.27%
Rick Lindsley
11
0.07%
1
0.27%
Pavel Tikhomirov
11
0.07%
1
0.27%
Eugene Teo
10
0.06%
1
0.27%
Motohiro Kosaki
9
0.05%
3
0.82%
Xiaotian Feng
9
0.05%
1
0.27%
Jann Horn
9
0.05%
1
0.27%
Josef 'Jeff' Sipek
9
0.05%
1
0.27%
Leon Yu
8
0.05%
1
0.27%
Lorenzo Stoakes
8
0.05%
1
0.27%
Li Zefan
8
0.05%
2
0.54%
Daniel Drake
6
0.04%
1
0.27%
Mathieu Desnoyers
6
0.04%
1
0.27%
Mathias Krause
6
0.04%
1
0.27%
Stanislav Kinsbursky
6
0.04%
1
0.27%
Siddhesh Poyarekar
6
0.04%
1
0.27%
Jovi Zhang
6
0.04%
1
0.27%
Vincent Li
6
0.04%
1
0.27%
Dave Hansen
5
0.03%
1
0.27%
Chris Metcalf
5
0.03%
1
0.27%
Artem Fetishev
5
0.03%
1
0.27%
Stephen Wilson
5
0.03%
1
0.27%
Willy Tarreau
4
0.02%
1
0.27%
Colin Ian King
4
0.02%
1
0.27%
Greg Kroah-Hartman
4
0.02%
3
0.82%
Guillaume Chazarain
4
0.02%
1
0.27%
Chris Wright
4
0.02%
2
0.54%
Randy Dunlap
4
0.02%
2
0.54%
Lafcadio Wluiki
4
0.02%
1
0.27%
Deepa Dinamani
4
0.02%
1
0.27%
Dipankar Sarma
4
0.02%
2
0.54%
Michael LeMay
3
0.02%
1
0.27%
Mandeep Singh Baines
3
0.02%
1
0.27%
Tejun Heo
3
0.02%
1
0.27%
Paul Jackson
3
0.02%
1
0.27%
Eric Engestrom
3
0.02%
1
0.27%
Daniel Jacobowitz
3
0.02%
1
0.27%
Kamezawa Hiroyuki
3
0.02%
1
0.27%
Trond Myklebust
2
0.01%
1
0.27%
Mel Gorman
2
0.01%
1
0.27%
Zhang Le
2
0.01%
1
0.27%
Jan Kara
2
0.01%
1
0.27%
Manfred Spraul
2
0.01%
1
0.27%
Jiri Olsa
2
0.01%
1
0.27%
Robin Humble
2
0.01%
1
0.27%
Mauricio Lin
1
0.01%
1
0.27%
Iago López Galeiras
1
0.01%
1
0.27%
Andre Noll
1
0.01%
1
0.27%
Fabian Frederick
1
0.01%
1
0.27%
Balbir Singh
1
0.01%
1
0.27%
Jerome Marchand
1
0.01%
1
0.27%
Kirill Korotaev
1
0.01%
1
0.27%
Steve Grubb
1
0.01%
1
0.27%
Glauber de Oliveira Costa
1
0.01%
1
0.27%
Jake Edge
1
0.01%
1
0.27%
Adrian Bunk
1
0.01%
1
0.27%
Ben Dooks
1
0.01%
1
0.27%
Total
16522
100.00%
368
100.00%
Directory: fs/proc

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