Release 4.10 kernel/audit.c

Directory: kernel
/* audit.c -- Auditing support
 * Gateway between the kernel (e.g., selinux) and the user-space audit daemon.
 * System-call specific features have moved to auditsc.c
 *
 * Copyright 2003-2007 Red Hat Inc., Durham, North Carolina.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Written by Rickard E. (Rik) Faith <faith@redhat.com>
 *
 * Goals: 1) Integrate fully with Security Modules.
 *        2) Minimal run-time overhead:
 *           a) Minimal when syscall auditing is disabled (audit_enable=0).
 *           b) Small when syscall auditing is enabled and no audit record
 *              is generated (defer as much work as possible to record
 *              generation time):
 *              i) context is allocated,
 *              ii) names from getname are stored without a copy, and
 *              iii) inode information stored from path_lookup.
 *        3) Ability to disable syscall auditing at boot time (audit=0).
 *        4) Usable by other parts of the kernel (if audit_log* is called,
 *           then a syscall record will be generated automatically for the
 *           current syscall).
 *        5) Netlink interface to user-space.
 *        6) Support low-overhead kernel-based filtering to minimize the
 *           information that must be passed to user-space.
 *
 * Example user-space utilities: http://people.redhat.com/sgrubb/audit/
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/file.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/atomic.h>
#include <linux/mm.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/kthread.h>
#include <linux/kernel.h>
#include <linux/syscalls.h>

#include <linux/audit.h>

#include <net/sock.h>
#include <net/netlink.h>
#include <linux/skbuff.h>
#ifdef CONFIG_SECURITY
#include <linux/security.h>
#endif
#include <linux/freezer.h>
#include <linux/pid_namespace.h>
#include <net/netns/generic.h>

#include "audit.h"

/* No auditing will take place until audit_initialized == AUDIT_INITIALIZED.
 * (Initialization happens after skb_init is called.) */

#define AUDIT_DISABLED		-1

#define AUDIT_UNINITIALIZED	0

#define AUDIT_INITIALIZED	1

static int	audit_initialized;


#define AUDIT_OFF	0

#define AUDIT_ON	1

#define AUDIT_LOCKED	2

u32		audit_enabled;

u32		audit_ever_enabled;


EXPORT_SYMBOL_GPL(audit_enabled);

/* Default state when kernel boots without any parameters. */

static u32	audit_default;

/* If auditing cannot proceed, audit_failure selects what happens. */

static u32	audit_failure = AUDIT_FAIL_PRINTK;

/*
 * If audit records are to be written to the netlink socket, audit_pid
 * contains the pid of the auditd process and audit_nlk_portid contains
 * the portid to use to send netlink messages to that process.
 */

int		audit_pid;

static __u32	audit_nlk_portid;

/* If audit_rate_limit is non-zero, limit the rate of sending audit records
 * to that number per second.  This prevents DoS attacks, but results in
 * audit records being dropped. */

static u32	audit_rate_limit;

/* Number of outstanding audit_buffers allowed.
 * When set to zero, this means unlimited. */

static u32	audit_backlog_limit = 64;

#define AUDIT_BACKLOG_WAIT_TIME (60 * HZ)

static u32	audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME;

/* The identity of the user shutting down the audit system. */

kuid_t		audit_sig_uid = INVALID_UID;

pid_t		audit_sig_pid = -1;

u32		audit_sig_sid = 0;

/* Records can be lost in several ways:
   0) [suppressed in audit_alloc]
   1) out of memory in audit_log_start [kmalloc of struct audit_buffer]
   2) out of memory in audit_log_move [alloc_skb]
   3) suppressed due to audit_rate_limit
   4) suppressed due to audit_backlog_limit
*/

static atomic_t    audit_lost = ATOMIC_INIT(0);

/* The netlink socket. */

static struct sock *audit_sock;

static unsigned int audit_net_id;

/* Hash for inode-based rules */

struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS];

/* The audit_freelist is a list of pre-allocated audit buffers (if more
 * than AUDIT_MAXFREE are in use, the audit buffer is freed instead of
 * being placed on the freelist). */
static DEFINE_SPINLOCK(audit_freelist_lock);

static int	   audit_freelist_count;
static LIST_HEAD(audit_freelist);

/* queue msgs to send via kauditd_task */

static struct sk_buff_head audit_queue;
/* queue msgs due to temporary unicast send problems */

static struct sk_buff_head audit_retry_queue;
/* queue msgs waiting for new auditd connection */

static struct sk_buff_head audit_hold_queue;

/* queue servicing thread */

static struct task_struct *kauditd_task;
static DECLARE_WAIT_QUEUE_HEAD(kauditd_wait);

/* waitqueue for callers who are blocked on the audit backlog */
static DECLARE_WAIT_QUEUE_HEAD(audit_backlog_wait);


static struct audit_features af = {.vers = AUDIT_FEATURE_VERSION,
				   .mask = -1,
				   .features = 0,
				   .lock = 0,};


static char *audit_feature_names[2] = {
	"only_unset_loginuid",
	"loginuid_immutable",
};


/* Serialize requests from userspace. */

DEFINE_MUTEX(audit_cmd_mutex);

/* AUDIT_BUFSIZ is the size of the temporary buffer used for formatting
 * audit records.  Since printk uses a 1024 byte buffer, this buffer
 * should be at least that large. */

#define AUDIT_BUFSIZ 1024

/* AUDIT_MAXFREE is the number of empty audit_buffers we keep on the
 * audit_freelist.  Doing so eliminates many kmalloc/kfree calls. */

#define AUDIT_MAXFREE  (2*NR_CPUS)

/* The audit_buffer is used when formatting an audit record.  The caller
 * locks briefly to get the record off the freelist or to allocate the
 * buffer, and locks briefly to send the buffer to the netlink layer or
 * to place it on a transmit queue.  Multiple audit_buffers can be in
 * use simultaneously. */

struct audit_buffer {
	
struct list_head     list;
	
struct sk_buff       *skb;	/* formatted skb ready to send */
	
struct audit_context *ctx;	/* NULL or associated context */
	
gfp_t		     gfp_mask;
};


struct audit_reply {
	
__u32 portid;
	
struct net *net;
	
struct sk_buff *skb;
};



static void audit_set_portid(struct audit_buffer *ab, __u32 portid)
{
	if (ab) {
		struct nlmsghdr *nlh = nlmsg_hdr(ab->skb);
		nlh->nlmsg_pid = portid;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
steve grubb steve grubb 25 65.79% 1 25.00%
eric paris eric paris 6 15.79% 1 25.00%
richard guy briggs richard guy briggs 4 10.53% 1 25.00%
arnaldo carvalho de melo arnaldo carvalho de melo 3 7.89% 1 25.00%
Total 38 100.00% 4 100.00%



void audit_panic(const char *message)
{
	switch (audit_failure) {
	case AUDIT_FAIL_SILENT:
		break;
	case AUDIT_FAIL_PRINTK:
		if (printk_ratelimit())
			pr_err("%s\n", message);
		break;
	case AUDIT_FAIL_PANIC:
		/* test audit_pid since printk is always losey, why bother? */
		if (audit_pid)
			panic("audit: %s\n", message);
		break;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 38 73.08% 1 20.00%
eric paris eric paris 10 19.23% 2 40.00%
joe perches joe perches 2 3.85% 1 20.00%
chris wright chris wright 2 3.85% 1 20.00%
Total 52 100.00% 5 100.00%



static inline int audit_rate_check(void)
{
	static unsigned long	last_check = 0;
	static int		messages   = 0;
	static DEFINE_SPINLOCK(lock);
	unsigned long		flags;
	unsigned long		now;
	unsigned long		elapsed;
	int			retval	   = 0;

	if (!audit_rate_limit) return 1;

	spin_lock_irqsave(&lock, flags);
	if (++messages < audit_rate_limit) {
		retval = 1;
	} else {
		now     = jiffies;
		elapsed = now - last_check;
		if (elapsed > HZ) {
			last_check = now;
			messages   = 0;
			retval     = 1;
		}
	}
	spin_unlock_irqrestore(&lock, flags);

	return retval;
}

Contributors
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andrew morton andrew morton 114 96.61% 1 50.00%
thomas gleixner thomas gleixner 4 3.39% 1 50.00%
Total 118 100.00% 2 100.00%

/**
 * audit_log_lost - conditionally log lost audit message event
 * @message: the message stating reason for lost audit message
 *
 * Emit at least 1 message per second, even if audit_rate_check is
 * throttling.
 * Always increment the lost messages counter.
*/


void audit_log_lost(const char *message)
{
	static unsigned long	last_msg = 0;
	static DEFINE_SPINLOCK(lock);
	unsigned long		flags;
	unsigned long		now;
	int			print;

	atomic_inc(&audit_lost);

	print = (audit_failure == AUDIT_FAIL_PANIC || !audit_rate_limit);

	if (!print) {
		spin_lock_irqsave(&lock, flags);
		now = jiffies;
		if (now - last_msg > HZ) {
			print = 1;
			last_msg = now;
		}
		spin_unlock_irqrestore(&lock, flags);
	}

	if (print) {
		if (printk_ratelimit())
			pr_warn("audit_lost=%u audit_rate_limit=%u audit_backlog_limit=%u\n",
				atomic_read(&audit_lost),
				audit_rate_limit,
				audit_backlog_limit);
		audit_panic(message);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 116 91.34% 1 20.00%
eric paris eric paris 5 3.94% 1 20.00%
thomas gleixner thomas gleixner 4 3.15% 1 20.00%
joe perches joe perches 2 1.57% 2 40.00%
Total 127 100.00% 5 100.00%



static int audit_log_config_change(char *function_name, u32 new, u32 old,
				   int allow_changes)
{
	struct audit_buffer *ab;
	int rc = 0;

	ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
	if (unlikely(!ab))
		return rc;
	audit_log_format(ab, "%s=%u old=%u", function_name, new, old);
	audit_log_session_info(ab);
	rc = audit_log_task_context(ab);
	if (rc)
		allow_changes = 0; /* Something weird, deny request */
	audit_log_format(ab, " res=%d", allow_changes);
	audit_log_end(ab);
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 58 56.86% 3 27.27%
steve grubb steve grubb 14 13.73% 2 18.18%
andrew morton andrew morton 12 11.76% 1 9.09%
kees cook kees cook 11 10.78% 1 9.09%
joe perches joe perches 3 2.94% 1 9.09%
serge hallyn serge hallyn 2 1.96% 1 9.09%
eric w. biederman eric w. biederman 1 0.98% 1 9.09%
adrian bunk adrian bunk 1 0.98% 1 9.09%
Total 102 100.00% 11 100.00%



static int audit_do_config_change(char *function_name, u32 *to_change, u32 new)
{
	int allow_changes, rc = 0;
	u32 old = *to_change;

	/* check if we are locked */
	if (audit_enabled == AUDIT_LOCKED)
		allow_changes = 0;
	else
		allow_changes = 1;

	if (audit_enabled != AUDIT_OFF) {
		rc = audit_log_config_change(function_name, new, old, allow_changes);
		if (rc)
			allow_changes = 0;
	}

	/* If we are allowed, make the change */
	if (allow_changes == 1)
		*to_change = new;
	/* Not allowed, update reason */
	else if (rc == 0)
		rc = -EPERM;
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
steve grubb steve grubb 54 52.43% 2 28.57%
eric paris eric paris 31 30.10% 1 14.29%
andrew morton andrew morton 12 11.65% 1 14.29%
joe perches joe perches 4 3.88% 1 14.29%
serge hallyn serge hallyn 1 0.97% 1 14.29%
adrian bunk adrian bunk 1 0.97% 1 14.29%
Total 103 100.00% 7 100.00%



static int audit_set_rate_limit(u32 limit)
{
	return audit_do_config_change("audit_rate_limit", &audit_rate_limit, limit);
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 7 35.00% 1 16.67%
steve grubb steve grubb 6 30.00% 2 33.33%
andrew morton andrew morton 5 25.00% 1 16.67%
joe perches joe perches 1 5.00% 1 16.67%
adrian bunk adrian bunk 1 5.00% 1 16.67%
Total 20 100.00% 6 100.00%



static int audit_set_backlog_limit(u32 limit)
{
	return audit_do_config_change("audit_backlog_limit", &audit_backlog_limit, limit);
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 16 80.00% 1 33.33%
andrew morton andrew morton 3 15.00% 1 33.33%
joe perches joe perches 1 5.00% 1 33.33%
Total 20 100.00% 3 100.00%



static int audit_set_backlog_wait_time(u32 timeout)
{
	return audit_do_config_change("audit_backlog_wait_time",
				      &audit_backlog_wait_time, timeout);
}

Contributors
Person Tokens Prop Commits CommitProp
richard guy briggs richard guy briggs 18 90.00% 1 33.33%
paul moore paul moore 1 5.00% 1 33.33%
joe perches joe perches 1 5.00% 1 33.33%
Total 20 100.00% 3 100.00%



static int audit_set_enabled(u32 state)
{
	int rc;
	if (state > AUDIT_LOCKED)
		return -EINVAL;

	rc =  audit_do_config_change("audit_enabled", &audit_enabled, state);
	if (!rc)
		audit_ever_enabled |= !!state;

	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 40 83.33% 2 33.33%
steve grubb steve grubb 5 10.42% 2 33.33%
andrew morton andrew morton 2 4.17% 1 16.67%
joe perches joe perches 1 2.08% 1 16.67%
Total 48 100.00% 6 100.00%



static int audit_set_failure(u32 state)
{
	if (state != AUDIT_FAIL_SILENT
	    && state != AUDIT_FAIL_PRINTK
	    && state != AUDIT_FAIL_PANIC)
		return -EINVAL;

	return audit_do_config_change("audit_failure", &audit_failure, state);
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 28 73.68% 1 20.00%
eric paris eric paris 4 10.53% 1 20.00%
steve grubb steve grubb 4 10.53% 1 20.00%
joe perches joe perches 1 2.63% 1 20.00%
adrian bunk adrian bunk 1 2.63% 1 20.00%
Total 38 100.00% 5 100.00%

/*
 * For one reason or another this nlh isn't getting delivered to the userspace
 * audit daemon, just send it to printk.
 */


static void kauditd_printk_skb(struct sk_buff *skb)
{
	struct nlmsghdr *nlh = nlmsg_hdr(skb);
	char *data = nlmsg_data(nlh);

	if (nlh->nlmsg_type != AUDIT_EOE) {
		if (printk_ratelimit())
			pr_notice("type=%d %s\n", nlh->nlmsg_type, data);
		else
			audit_log_lost("printk limit exceeded");
	}
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 58 93.55% 1 20.00%
paul moore paul moore 1 1.61% 1 20.00%
joe perches joe perches 1 1.61% 1 20.00%
josh boyer josh boyer 1 1.61% 1 20.00%
david s. miller david s. miller 1 1.61% 1 20.00%
Total 62 100.00% 5 100.00%

/**
 * kauditd_hold_skb - Queue an audit record, waiting for auditd
 * @skb: audit record
 *
 * Description:
 * Queue the audit record, waiting for an instance of auditd.  When this
 * function is called we haven't given up yet on sending the record, but things
 * are not looking good.  The first thing we want to do is try to write the
 * record via printk and then see if we want to try and hold on to the record
 * and queue it, if we have room.  If we want to hold on to the record, but we
 * don't have room, record a record lost message.
 */


static void kauditd_hold_skb(struct sk_buff *skb)
{
	/* at this point it is uncertain if we will ever send this to auditd so
         * try to send the message via printk before we go any further */
	kauditd_printk_skb(skb);

	/* can we just silently drop the message? */
	if (!audit_default) {
		kfree_skb(skb);
		return;
	}

	/* if we have room, queue the message */
	if (!audit_backlog_limit ||
	    skb_queue_len(&audit_hold_queue) < audit_backlog_limit) {
		skb_queue_tail(&audit_hold_queue, skb);
		return;
	}

	/* we have no other options - drop the message */
	audit_log_lost("kauditd hold queue overflow");
	kfree_skb(skb);
}

Contributors
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paul moore paul moore 27 40.30% 1 16.67%
eric paris eric paris 17 25.37% 2 33.33%
david woodhouse david woodhouse 13 19.40% 1 16.67%
richard guy briggs richard guy briggs 10 14.93% 2 33.33%
Total 67 100.00% 6 100.00%

/**
 * kauditd_retry_skb - Queue an audit record, attempt to send again to auditd
 * @skb: audit record
 *
 * Description:
 * Not as serious as kauditd_hold_skb() as we still have a connected auditd,
 * but for some reason we are having problems sending it audit records so
 * queue the given record and attempt to resend.
 */


static void kauditd_retry_skb(struct sk_buff *skb)
{
	/* NOTE: because records should only live in the retry queue for a
         * short period of time, before either being sent or moved to the hold
         * queue, we don't currently enforce a limit on this queue */
	skb_queue_tail(&audit_retry_queue, skb);
}

Contributors
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richard guy briggs richard guy briggs 16 80.00% 2 66.67%
paul moore paul moore 4 20.00% 1 33.33%
Total 20 100.00% 3 100.00%

/**
 * auditd_reset - Disconnect the auditd connection
 *
 * Description:
 * Break the auditd/kauditd connection and move all the records in the retry
 * queue into the hold queue in case auditd reconnects.  The audit_cmd_mutex
 * must be held when calling this function.
 */


static void auditd_reset(void)
{
	struct sk_buff *skb;

	/* break the connection */
	if (audit_sock) {
		sock_put(audit_sock);
		audit_sock = NULL;
	}
	audit_pid = 0;
	audit_nlk_portid = 0;

	/* flush all of the retry queue to the hold queue */
	while ((skb = skb_dequeue(&audit_retry_queue)))
		kauditd_hold_skb(skb);
}

Contributors
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eric paris eric paris 20 36.36% 1 14.29%
richard guy briggs richard guy briggs 20 36.36% 4 57.14%
paul moore paul moore 11 20.00% 1 14.29%
david woodhouse david woodhouse 4 7.27% 1 14.29%
Total 55 100.00% 7 100.00%

/**
 * kauditd_send_unicast_skb - Send a record via unicast to auditd
 * @skb: audit record
 */


static int kauditd_send_unicast_skb(struct sk_buff *skb)
{
	int rc;

	/* if we know nothing is connected, don't even try the netlink call */
	if (!audit_pid)
		return -ECONNREFUSED;

	/* get an extra skb reference in case we fail to send */
	skb_get(skb);
	rc = netlink_unicast(audit_sock, skb, audit_nlk_portid, 0);
	if (rc >= 0) {
		consume_skb(skb);
		rc = 0;
	}

	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
paul moore paul moore 46 73.02% 2 33.33%
eric paris eric paris 14 22.22% 1 16.67%
david woodhouse david woodhouse 1 1.59% 1 16.67%
richard guy briggs richard guy briggs 1 1.59% 1 16.67%
neil horman neil horman 1 1.59% 1 16.67%
Total 63 100.00% 6 100.00%

/*
 * kauditd_send_multicast_skb - Send a record to any multicast listeners
 * @skb: audit record
 *
 * Description:
 * This function doesn't consume an skb as might be expected since it has to
 * copy it anyways.
 */


static void kauditd_send_multicast_skb(struct sk_buff *skb)
{
	struct sk_buff *copy;
	struct audit_net *aunet = net_generic(&init_net, audit_net_id);
	struct sock *sock = aunet->nlsk;
	struct nlmsghdr *nlh;

	if (!netlink_has_listeners(sock, AUDIT_NLGRP_READLOG))
		return;

	/*
         * The seemingly wasteful skb_copy() rather than bumping the refcount
         * using skb_get() is necessary because non-standard mods are made to
         * the skb by the original kaudit unicast socket send routine.  The
         * existing auditd daemon assumes this breakage.  Fixing this would
         * require co-ordinating a change in the established protocol between
         * the kaudit kernel subsystem and the auditd userspace code.  There is
         * no reason for new multicast clients to continue with this
         * non-compliance.
         */
	copy = skb_copy(skb, GFP_KERNEL);
	if (!copy)
		return;
	nlh = nlmsg_hdr(copy);
	nlh->nlmsg_len = skb->len;

	nlmsg_multicast(sock, copy, 0, AUDIT_NLGRP_READLOG, GFP_KERNEL);
}

Contributors
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richard guy briggs richard guy briggs 49 50.00% 3 60.00%
paul moore paul moore 44 44.90% 1 20.00%
eric paris eric paris 5 5.10% 1 20.00%
Total 98 100.00% 5 100.00%

/**
 * kauditd_wake_condition - Return true when it is time to wake kauditd_thread
 *
 * Description:
 * This function is for use by the wait_event_freezable() call in
 * kauditd_thread().
 */


static int kauditd_wake_condition(void)
{
	static int pid_last = 0;
	int rc;
	int pid = audit_pid;

	/* wake on new messages or a change in the connected auditd */
	rc = skb_queue_len(&audit_queue) || (pid && pid != pid_last);
	if (rc)
		pid_last = pid;

	return rc;
}

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paul moore paul moore 50 100.00% 1 100.00%
Total 50 100.00% 1 100.00%



static int kauditd_thread(void *dummy)
{
	int rc;
	int auditd = 0;
	int reschedule = 0;
	struct sk_buff *skb;
	struct nlmsghdr *nlh;


#define UNICAST_RETRIES 5

#define AUDITD_BAD(x,y) \
	((x) == -ECONNREFUSED || (x) == -EPERM || ++(y) >= UNICAST_RETRIES)

	/* NOTE: we do invalidate the auditd connection flag on any sending
         * errors, but we only "restore" the connection flag at specific places
         * in the loop in order to help ensure proper ordering of audit
         * records */

	set_freezable();
	while (!kthread_should_stop()) {
		/* NOTE: possible area for future improvement is to look at
                 *       the hold and retry queues, since only this thread
                 *       has access to these queues we might be able to do
                 *       our own queuing and skip some/all of the locking */

		/* NOTE: it might be a fun experiment to split the hold and
                 *       retry queue handling to another thread, but the
                 *       synchronization issues and other overhead might kill
                 *       any performance gains */

		/* attempt to flush the hold queue */
		while (auditd && (skb = skb_dequeue(&audit_hold_queue))) {
			rc = kauditd_send_unicast_skb(skb);
			if (rc) {
				/* requeue to the same spot */
				skb_queue_head(&audit_hold_queue, skb);

				auditd = 0;
				if (AUDITD_BAD(rc, reschedule)) {
					mutex_lock(&audit_cmd_mutex);
					auditd_reset();
					mutex_unlock(&audit_cmd_mutex);
					reschedule = 0;
				}
			} else
				/* we were able to send successfully */
				reschedule = 0;
		}

		/* attempt to flush the retry queue */
		while (auditd && (skb = skb_dequeue(&audit_retry_queue))) {
			rc = kauditd_send_unicast_skb(skb);
			if (rc) {
				auditd = 0;
				if (AUDITD_BAD(rc, reschedule)) {
					kauditd_hold_skb(skb);
					mutex_lock(&audit_cmd_mutex);
					auditd_reset();
					mutex_unlock(&audit_cmd_mutex);
					reschedule = 0;
				} else
					/* temporary problem (we hope), queue
                                         * to the same spot and retry */
					skb_queue_head(&audit_retry_queue, skb);
			} else
				/* we were able to send successfully */
				reschedule = 0;
		}

		/* standard queue processing, try to be as quick as possible */
quick_loop:
		skb = skb_dequeue(&audit_queue);
		if (skb) {
			/* setup the netlink header, see the comments in
                         * kauditd_send_multicast_skb() for length quirks */
			nlh = nlmsg_hdr(skb);
			nlh->nlmsg_len = skb->len - NLMSG_HDRLEN;

			/* attempt to send to any multicast listeners */
			kauditd_send_multicast_skb(skb);

			/* attempt to send to auditd, queue on failure */
			if (auditd) {
				rc = kauditd_send_unicast_skb(skb);
				if (rc) {
					auditd = 0;
					if (AUDITD_BAD(rc, reschedule)) {
						mutex_lock(&audit_cmd_mutex);
						auditd_reset();
						mutex_unlock(&audit_cmd_mutex);
						reschedule = 0;
					}

					/* move to the retry queue */
					kauditd_retry_skb(skb);
				} else
					/* everything is working so go fast! */
					goto quick_loop;
			} else if (reschedule)
				/* we are currently having problems, move to
                                 * the retry queue */
				kauditd_retry_skb(skb);
			else
				/* dump the message via printk and hold it */
				kauditd_hold_skb(skb);
		} else {
			/* we have flushed the backlog so wake everyone */
			wake_up(&audit_backlog_wait);

			/* if everything is okay with auditd (if present), go
                         * to sleep until there is something new in the queue
                         * or we have a change in the connected auditd;
                         * otherwise simply reschedule to give things a chance
                         * to recover */
			if (reschedule) {
				set_current_state(TASK_INTERRUPTIBLE);
				schedule();
			} else
				wait_event_freezable(kauditd_wait,
						     kauditd_wake_condition());

			/* update the auditd connection status */
			auditd = (audit_pid ? 1 : 0);
		}
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
paul moore paul moore 239 60.20% 3 25.00%
richard guy briggs richard guy briggs 78 19.65% 4 33.33%
eric paris eric paris 48 12.09% 1 8.33%
david woodhouse david woodhouse 16 4.03% 1 8.33%
dan duval dan duval 12 3.02% 1 8.33%
andrew morton andrew morton 3 0.76% 1 8.33%
peter zijlstra peter zijlstra 1 0.25% 1 8.33%
Total 397 100.00% 12 100.00%



int audit_send_list(void *_dest)
{
	struct audit_netlink_list *dest = _dest;
	struct sk_buff *skb;
	struct net *net = dest->net;
	struct audit_net *aunet = net_generic(net, audit_net_id);

	/* wait for parent to finish and send an ACK */
	mutex_lock(&audit_cmd_mutex);
	mutex_unlock(&audit_cmd_mutex);

	while ((skb = __skb_dequeue(&dest->q)) != NULL)
		netlink_unicast(aunet->nlsk, skb, dest->portid, 0);

	put_net(net);
	kfree(dest);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
al viro al viro 66 66.67% 1 16.67%
richard guy briggs richard guy briggs 24 24.24% 2 33.33%
eric w. biederman eric w. biederman 6 6.06% 1 16.67%
amy griffis amy griffis 2 2.02% 1 16.67%
andrew morton andrew morton 1 1.01% 1 16.67%
Total 99 100.00% 6 100.00%



struct sk_buff *audit_make_reply(__u32 portid, int seq, int type, int done,
				 int multi, const void *payload, int size)
{
	struct sk_buff	*skb;
	struct nlmsghdr	*nlh;
	void		*data;
	int		flags = multi ? NLM_F_MULTI : 0;
	int		t     = done  ? NLMSG_DONE  : type;

	skb = nlmsg_new(size, GFP_KERNEL);
	if (!skb)
		return NULL;

	nlh	= nlmsg_put(skb, portid, seq, t, size, flags);
	if (!nlh)
		goto out_kfree_skb;
	data = nlmsg_data(nlh);
	memcpy(data, payload, size);
	return skb;

out_kfree_skb:
	kfree_skb(skb);
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 95 71.43% 1 14.29%
al viro al viro 18 13.53% 1 14.29%
david s. miller david s. miller 11 8.27% 1 14.29%
eric paris eric paris 4 3.01% 1 14.29%
richard guy briggs richard guy briggs 3 2.26% 1 14.29%
stephen hemminger stephen hemminger 1 0.75% 1 14.29%
david woodhouse david woodhouse 1 0.75% 1 14.29%
Total 133 100.00% 7 100.00%



static int audit_send_reply_thread(void *arg)
{
	struct audit_reply *reply = (struct audit_reply *)arg;
	struct net *net = reply->net;
	struct audit_net *aunet = net_generic(net, audit_net_id);

	mutex_lock(&audit_cmd_mutex);
	mutex_unlock(&audit_cmd_mutex);

	/* Ignore failure. It'll only happen if the sender goes away,
           because our timeout is set to infinite. */
	netlink_unicast(aunet->nlsk , reply->skb, reply->portid, 0);
	put_net(net);
	kfree(reply);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 56 65.12% 1 25.00%
richard guy briggs richard guy briggs 24 27.91% 2 50.00%
eric w. biederman eric w. biederman 6 6.98% 1 25.00%
Total 86 100.00% 4 100.00%

/**
 * audit_send_reply - send an audit reply message via netlink
 * @request_skb: skb of request we are replying to (used to target the reply)
 * @seq: sequence number
 * @type: audit message type
 * @done: done (last) flag
 * @multi: multi-part message flag
 * @payload: payload data
 * @size: payload size
 *
 * Allocates an skb, builds the netlink message, and sends it to the port id.
 * No failure notifications.
 */


static void audit_send_reply(struct sk_buff *request_skb, int seq, int type, int done,
			     int multi, const void *payload, int size)
{
	u32 portid = NETLINK_CB(request_skb).portid;
	struct net *net = sock_net(NETLINK_CB(request_skb).sk);
	struct sk_buff *skb;
	struct task_struct *tsk;
	struct audit_reply *reply = kmalloc(sizeof(struct audit_reply),
					    GFP_KERNEL);

	if (!reply)
		return;

	skb = audit_make_reply(portid, seq, type, done, multi, payload, size);
	if (!skb)
		goto out;

	reply->net = get_net(net);
	reply->portid = portid;
	reply->skb = skb;

	tsk = kthread_run(audit_send_reply_thread, reply, "audit_send_reply");
	if (!IS_ERR(tsk))
		return;
	kfree_skb(skb);
out:
	kfree(reply);
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 57 33.93% 1 11.11%
al viro al viro 47 27.98% 1 11.11%
eric w. biederman eric w. biederman 36 21.43% 2 22.22%
andrew morton andrew morton 21 12.50% 2 22.22%
richard guy briggs richard guy briggs 5 2.98% 2 22.22%
stephen hemminger stephen hemminger 2 1.19% 1 11.11%
Total 168 100.00% 9 100.00%

/*
 * Check for appropriate CAP_AUDIT_ capabilities on incoming audit
 * control messages.
 */


static int audit_netlink_ok(struct sk_buff *skb, u16 msg_type)
{
	int err = 0;

	/* Only support initial user namespace for now. */
	/*
         * We return ECONNREFUSED because it tricks userspace into thinking
         * that audit was not configured into the kernel.  Lots of users
         * configure their PAM stack (because that's what the distro does)
         * to reject login if unable to send messages to audit.  If we return
         * ECONNREFUSED the PAM stack thinks the kernel does not have audit
         * configured in and will let login proceed.  If we return EPERM
         * userspace will reject all logins.  This should be removed when we
         * support non init namespaces!!
         */
	if (current_user_ns() != &init_user_ns)
		return -ECONNREFUSED;

	switch (msg_type) {
	case AUDIT_LIST:
	case AUDIT_ADD:
	case AUDIT_DEL:
		return -EOPNOTSUPP;
	case AUDIT_GET:
	case AUDIT_SET:
	case AUDIT_GET_FEATURE:
	case AUDIT_SET_FEATURE:
	case AUDIT_LIST_RULES:
	case AUDIT_ADD_RULE:
	case AUDIT_DEL_RULE:
	case AUDIT_SIGNAL_INFO:
	case AUDIT_TTY_GET:
	case AUDIT_TTY_SET:
	case AUDIT_TRIM:
	case AUDIT_MAKE_EQUIV:
		/* Only support auditd and auditctl in initial pid namespace
                 * for now. */
		if (task_active_pid_ns(current) != &init_pid_ns)
			return -EPERM;

		if (!netlink_capable(skb, CAP_AUDIT_CONTROL))
			err = -EPERM;
		break;
	case AUDIT_USER:
	case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG:
	case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2:
		if (!netlink_capable(skb, CAP_AUDIT_WRITE))
			err = -EPERM;
		break;
	default:  /* bad msg */
		err = -EINVAL;
	}

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
serge hallyn serge hallyn 66 41.77% 1 5.88%
eric paris eric paris 21 13.29% 4 23.53%
eric w. biederman eric w. biederman 17 10.76% 2 11.76%
richard guy briggs richard guy briggs 16 10.13% 1 5.88%
steve grubb steve grubb 12 7.59% 4 23.53%
amy griffis amy griffis 7 4.43% 1 5.88%
miloslav trmac miloslav trmac 6 3.80% 1 5.88%
al viro al viro 6 3.80% 1 5.88%
darrel goeddel darrel goeddel 4 2.53% 1 5.88%
david woodhouse david woodhouse 3 1.90% 1 5.88%
Total 158 100.00% 17 100.00%



static void audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type)
{
	uid_t uid = from_kuid(&init_user_ns, current_uid());
	pid_t pid = task_tgid_nr(current);

	if (!audit_enabled && msg_type != AUDIT_USER_AVC) {
		*ab = NULL;
		return;
	}

	*ab = audit_log_start(NULL, GFP_KERNEL, msg_type);
	if (unlikely(!*ab))
		return;
	audit_log_format(*ab, "pid=%d uid=%u", pid, uid);
	audit_log_session_info(*ab);
	audit_log_task_context(*ab);
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 72 73.47% 4 44.44%
kees cook kees cook 9 9.18% 1 11.11%
richard guy briggs richard guy briggs 9 9.18% 1 11.11%
tyler hicks tyler hicks 4 4.08% 1 11.11%
paul moore paul moore 3 3.06% 1 11.11%
eric w. biederman eric w. biederman 1 1.02% 1 11.11%
Total 98 100.00% 9 100.00%



int is_audit_feature_set(int i)
{
	return af.features & AUDIT_FEATURE_TO_MASK(i);
}


Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 18 100.00% 1 100.00%
Total 18 100.00% 1 100.00%



static int audit_get_feature(struct sk_buff *skb)
{
	u32 seq;

	seq = nlmsg_hdr(skb)->nlmsg_seq;

	audit_send_reply(skb, seq, AUDIT_GET_FEATURE, 0, 0, &af, sizeof(af));

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 46 97.87% 1 50.00%
richard guy briggs richard guy briggs 1 2.13% 1 50.00%
Total 47 100.00% 2 100.00%



static void audit_log_feature_change(int which, u32 old_feature, u32 new_feature,
				     u32 old_lock, u32 new_lock, int res)
{
	struct audit_buffer *ab;

	if (audit_enabled == AUDIT_OFF)
		return;

	ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_FEATURE_CHANGE);
	audit_log_task_info(ab, current);
	audit_log_format(ab, " feature=%s old=%u new=%u old_lock=%u new_lock=%u res=%d",
			 audit_feature_names[which], !!old_feature, !!new_feature,
			 !!old_lock, !!new_lock, res);
	audit_log_end(ab);
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 74 83.15% 1 25.00%
richard guy briggs richard guy briggs 8 8.99% 2 50.00%
gao feng gao feng 7 7.87% 1 25.00%
Total 89 100.00% 4 100.00%



static int audit_set_feature(struct sk_buff *skb)
{
	struct audit_features *uaf;
	int i;

	BUILD_BUG_ON(AUDIT_LAST_FEATURE + 1 > ARRAY_SIZE(audit_feature_names));
	uaf = nlmsg_data(nlmsg_hdr(skb));

	/* if there is ever a version 2 we should handle that here */

	for (i = 0; i <= AUDIT_LAST_FEATURE; i++) {
		u32 feature = AUDIT_FEATURE_TO_MASK(i);
		u32 old_feature, new_feature, old_lock, new_lock;

		/* if we are not changing this feature, move along */
		if (!(feature & uaf->mask))
			continue;

		old_feature = af.features & feature;
		new_feature = uaf->features & feature;
		new_lock = (uaf->lock | af.lock) & feature;
		old_lock = af.lock & feature;

		/* are we changing a locked feature? */
		if (old_lock && (new_feature != old_feature)) {
			audit_log_feature_change(i, old_feature, new_feature,
						 old_lock, new_lock, 0);
			return -EPERM;
		}
	}
	/* nothing invalid, do the changes */
	for (i = 0; i <= AUDIT_LAST_FEATURE; i++) {
		u32 feature = AUDIT_FEATURE_TO_MASK(i);
		u32 old_feature, new_feature, old_lock, new_lock;

		/* if we are not changing this feature, move along */
		if (!(feature & uaf->mask))
			continue;

		old_feature = af.features & feature;
		new_feature = uaf->features & feature;
		old_lock = af.lock & feature;
		new_lock = (uaf->lock | af.lock) & feature;

		if (new_feature != old_feature)
			audit_log_feature_change(i, old_feature, new_feature,
						 old_lock, new_lock, 1);

		if (new_feature)
			af.features |= feature;
		else
			af.features &= ~feature;
		af.lock |= new_lock;
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 287 99.31% 1 33.33%
gao feng gao feng 1 0.35% 1 33.33%
fabian frederick fabian frederick 1 0.35% 1 33.33%
Total 289 100.00% 3 100.00%



static int audit_replace(pid_t pid)
{
	struct sk_buff *skb = audit_make_reply(0, 0, AUDIT_REPLACE, 0, 0,
					       &pid, sizeof(pid));

	if (!skb)
		return -ENOMEM;
	return netlink_unicast(audit_sock, skb, audit_nlk_portid, 0);
}

Contributors
Person Tokens Prop Commits CommitProp
richard guy briggs richard guy briggs 56 100.00% 1 100.00%
Total 56 100.00% 1 100.00%



static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
	u32			seq;
	void			*data;
	int			err;
	struct audit_buffer	*ab;
	u16			msg_type = nlh->nlmsg_type;
	struct audit_sig_info   *sig_data;
	char			*ctx = NULL;
	u32			len;

	err = audit_netlink_ok(skb, msg_type);
	if (err)
		return err;

	seq  = nlh->nlmsg_seq;
	data = nlmsg_data(nlh);

	switch (msg_type) {
	case AUDIT_GET: {
		struct audit_status	s;
		memset(&s, 0, sizeof(s));
		s.enabled		= audit_enabled;
		s.failure		= audit_failure;
		s.pid			= audit_pid;
		s.rate_limit		= audit_rate_limit;
		s.backlog_limit		= audit_backlog_limit;
		s.lost			= atomic_read(&audit_lost);
		s.backlog		= skb_queue_len(&audit_queue);
		s.feature_bitmap	= AUDIT_FEATURE_BITMAP_ALL;
		s.backlog_wait_time	= audit_backlog_wait_time;
		audit_send_reply(skb, seq, AUDIT_GET, 0, 0, &s, sizeof(s));
		break;
	}
	case AUDIT_SET: {
		struct audit_status	s;
		memset(&s, 0, sizeof(s));
		/* guard against past and future API changes */
		memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh)));
		if (s.mask & AUDIT_STATUS_ENABLED) {
			err = audit_set_enabled(s.enabled);
			if (err < 0)
				return err;
		}
		if (s.mask & AUDIT_STATUS_FAILURE) {
			err = audit_set_failure(s.failure);
			if (err < 0)
				return err;
		}
		if (s.mask & AUDIT_STATUS_PID) {
			/* NOTE: we are using task_tgid_vnr() below because
                         *       the s.pid value is relative to the namespace
                         *       of the caller; at present this doesn't matter
                         *       much since you can really only run auditd
                         *       from the initial pid namespace, but something
                         *       to keep in mind if this changes */
			int new_pid = s.pid;
			pid_t requesting_pid = task_tgid_vnr(current);

			if ((!new_pid) && (requesting_pid != audit_pid)) {
				audit_log_config_change("audit_pid", new_pid, audit_pid, 0);
				return -EACCES;
			}
			if (audit_pid && new_pid &&
			    audit_replace(requesting_pid) != -ECONNREFUSED) {
				audit_log_config_change("audit_pid", new_pid, audit_pid, 0);
				return -EEXIST;
			}
			if (audit_enabled != AUDIT_OFF)
				audit_log_config_change("audit_pid", new_pid, audit_pid, 1);
			if (new_pid) {
				if (audit_sock)
					sock_put(audit_sock);
				audit_pid = new_pid;
				audit_nlk_portid = NETLINK_CB(skb).portid;
				sock_hold(skb->sk);
				audit_sock = skb->sk;
			} else {
				auditd_reset();
			}
			wake_up_interruptible(&kauditd_wait);
		}
		if (s.mask & AUDIT_STATUS_RATE_LIMIT) {
			err = audit_set_rate_limit(s.rate_limit);
			if (err < 0)
				return err;
		}
		if (s.mask & AUDIT_STATUS_BACKLOG_LIMIT) {
			err = audit_set_backlog_limit(s.backlog_limit);
			if (err < 0)
				return err;
		}
		if (s.mask & AUDIT_STATUS_BACKLOG_WAIT_TIME) {
			if (sizeof(s) > (size_t)nlh->nlmsg_len)
				return -EINVAL;
			if (s.backlog_wait_time > 10*AUDIT_BACKLOG_WAIT_TIME)
				return -EINVAL;
			err = audit_set_backlog_wait_time(s.backlog_wait_time);
			if (err < 0)
				return err;
		}
		break;
	}
	case AUDIT_GET_FEATURE:
		err = audit_get_feature(skb);
		if (err)
			return err;
		break;
	case AUDIT_SET_FEATURE:
		err = audit_set_feature(skb);
		if (err)
			return err;
		break;
	case AUDIT_USER:
	case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG:
	case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2:
		if (!audit_enabled && msg_type != AUDIT_USER_AVC)
			return 0;

		err = audit_filter(msg_type, AUDIT_FILTER_USER);
		if (err == 1) { /* match or error */
			err = 0;
			if (msg_type == AUDIT_USER_TTY) {
				err = tty_audit_push();
				if (err)
					break;
			}
			mutex_unlock(&audit_cmd_mutex);
			audit_log_common_recv_msg(&ab, msg_type);
			if (msg_type != AUDIT_USER_TTY)
				audit_log_format(ab, " msg='%.*s'",
						 AUDIT_MESSAGE_TEXT_MAX,
						 (char *)data);
			else {
				int size;

				audit_log_format(ab, " data=");
				size = nlmsg_len(nlh);
				if (size > 0 &&
				    ((unsigned char *)data)[size - 1] == '\0')
					size--;
				audit_log_n_untrustedstring(ab, data, size);
			}
			audit_set_portid(ab, NETLINK_CB(skb).portid);
			audit_log_end(ab);
			mutex_lock(&audit_cmd_mutex);
		}
		break;
	case AUDIT_ADD_RULE:
	case AUDIT_DEL_RULE:
		if (nlmsg_len(nlh) < sizeof(struct audit_rule_data))
			return -EINVAL;
		if (audit_enabled == AUDIT_LOCKED) {
			audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
			audit_log_format(ab, " audit_enabled=%d res=0", audit_enabled);
			audit_log_end(ab);
			return -EPERM;
		}
		err = audit_rule_change(msg_type, NETLINK_CB(skb).portid,
					   seq, data, nlmsg_len(nlh));
		break;
	case AUDIT_LIST_RULES:
		err = audit_list_rules_send(skb, seq);
		break;
	case AUDIT_TRIM:
		audit_trim_trees();
		audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
		audit_log_format(ab, " op=trim res=1");
		audit_log_end(ab);
		break;
	case AUDIT_MAKE_EQUIV: {
		void *bufp = data;
		u32 sizes[2];
		size_t msglen = nlmsg_len(nlh);
		char *old, *new;

		err = -EINVAL;
		if (msglen < 2 * sizeof(u32))
			break;
		memcpy(sizes, bufp, 2 * sizeof(u32));
		bufp += 2 * sizeof(u32);
		msglen -= 2 * sizeof(u32);
		old = audit_unpack_string(&bufp, &msglen, sizes[0]);
		if (IS_ERR(old)) {
			err = PTR_ERR(old);
			break;
		}
		new = audit_unpack_string(&bufp, &msglen, sizes[1]);
		if (IS_ERR(new)) {
			err = PTR_ERR(new);
			kfree(old);
			break;
		}
		/* OK, here comes... */
		err = audit_tag_tree(old, new);

		audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);

		audit_log_format(ab, " op=make_equiv old=");
		audit_log_untrustedstring(ab, old);
		audit_log_format(ab, " new=");
		audit_log_untrustedstring(ab, new);
		audit_log_format(ab, " res=%d", !err);
		audit_log_end(ab);
		kfree(old);
		kfree(new);
		break;
	}
	case AUDIT_SIGNAL_INFO:
		len = 0;
		if (audit_sig_sid) {
			err = security_secid_to_secctx(audit_sig_sid, &ctx, &len);
			if (err)
				return err;
		}
		sig_data = kmalloc(sizeof(*sig_data) + len, GFP_KERNEL);
		if (!sig_data) {
			if (audit_sig_sid)
				security_release_secctx(ctx, len);
			return -ENOMEM;
		}
		sig_data->uid = from_kuid(&init_user_ns, audit_sig_uid);
		sig_data->pid = audit_sig_pid;
		if (audit_sig_sid) {
			memcpy(sig_data->ctx, ctx, len);
			security_release_secctx(ctx, len);
		}
		audit_send_reply(skb, seq, AUDIT_SIGNAL_INFO, 0, 0,
				 sig_data, sizeof(*sig_data) + len);
		kfree(sig_data);
		break;
	case AUDIT_TTY_GET: {
		struct audit_tty_status s;
		unsigned int t;

		t = READ_ONCE(current->signal->audit_tty);
		s.enabled = t & AUDIT_TTY_ENABLE;
		s.log_passwd = !!(t & AUDIT_TTY_LOG_PASSWD);

		audit_send_reply(skb, seq, AUDIT_TTY_GET, 0, 0, &s, sizeof(s));
		break;
	}
	case AUDIT_TTY_SET: {
		struct audit_tty_status s, old;
		struct audit_buffer	*ab;
		unsigned int t;

		memset(&s, 0, sizeof(s));
		/* guard against past and future API changes */
		memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh)));
		/* check if new data is valid */
		if ((s.enabled != 0 && s.enabled != 1) ||
		    (s.log_passwd != 0 && s.log_passwd != 1))
			err = -EINVAL;

		if (err)
			t = READ_ONCE(current->signal->audit_tty);
		else {
			t = s.enabled | (-s.log_passwd & AUDIT_TTY_LOG_PASSWD);
			t = xchg(&current->signal->audit_tty, t);
		}
		old.enabled = t & AUDIT_TTY_ENABLE;
		old.log_passwd = !!(t & AUDIT_TTY_LOG_PASSWD);

		audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
		audit_log_format(ab, " op=tty_set old-enabled=%d new-enabled=%d"
				 " old-log_passwd=%d new-log_passwd=%d res=%d",
				 old.enabled, s.enabled, old.log_passwd,
				 s.log_passwd, !err);
		audit_log_end(ab);
		break;
	}
	default:
		err = -EINVAL;
		break;
	}

	return err < 0 ? err : 0;
}

Contributors
Person Tokens Prop Commits CommitProp
richard guy briggs richard guy briggs 346 22.29% 16 22.86%
al viro al viro 322 20.75% 2 2.86%
andrew morton andrew morton 227 14.63% 1 1.43%
eric paris eric paris 150 9.66% 11 15.71%
miloslav trmac miloslav trmac 150 9.66% 2 2.86%
steve grubb steve grubb 110 7.09% 7 10.00%
peter hurley peter hurley 68 4.38% 2 2.86%
amy griffis amy griffis 40 2.58% 1 1.43%
david woodhouse david woodhouse 31 2.00% 4 5.71%
serge hallyn serge hallyn 30 1.93% 3 4.29%
eric w. biederman eric w. biederman 19 1.22% 4 5.71%
paul moore paul moore 12 0.77% 5 7.14%
zhang xiliang zhang xiliang 11 0.71% 1 1.43%
mathias krause mathias krause 10 0.64% 2 2.86%
ahmed s. darwish ahmed s. darwish 7 0.45% 1 1.43%
pavel emelianov pavel emelianov 7 0.45% 1 1.43%
harvey harrison harvey harrison 5 0.32% 1 1.43%
thomas gleixner thomas gleixner 2 0.13% 1 1.43%
gao feng gao feng 1 0.06% 1 1.43%
david s. miller david s. miller 1 0.06% 1 1.43%
linus torvalds linus torvalds 1 0.06% 1 1.43%
peng haitao peng haitao 1 0.06% 1 1.43%
chris wright chris wright 1 0.06% 1 1.43%
Total 1552 100.00% 70 100.00%

/*
 * Get message from skb.  Each message is processed by audit_receive_msg.
 * Malformed skbs with wrong length are discarded silently.
 */


static void audit_receive_skb(struct sk_buff *skb)
{
	struct nlmsghdr *nlh;
	/*
         * len MUST be signed for nlmsg_next to be able to dec it below 0
         * if the nlmsg_len was not aligned
         */
	int len;
	int err;

	nlh = nlmsg_hdr(skb);
	len = skb->len;

	while (nlmsg_ok(nlh, len)) {
		err = audit_receive_msg(skb, nlh);
		/* if err or if this message says it wants a response */
		if (err || (nlh->nlmsg_flags & NLM_F_ACK))
			netlink_ack(skb, nlh, err);

		nlh = nlmsg_next(nlh, &len);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 59 67.05% 1 16.67%
eric paris eric paris 21 23.86% 1 16.67%
arnaldo carvalho de melo arnaldo carvalho de melo 3 3.41% 1 16.67%
hong zhi guo hong zhi guo 3 3.41% 1 16.67%
alex copot alex copot 1 1.14% 1 16.67%
herbert xu herbert xu 1 1.14% 1 16.67%
Total 88 100.00% 6 100.00%

/* Receive messages from netlink socket. */


static void audit_receive(struct sk_buff  *skb)
{
	mutex_lock(&audit_cmd_mutex);
	audit_receive_skb(skb);
	mutex_unlock(&audit_cmd_mutex);
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 19 67.86% 1 20.00%
herbert xu herbert xu 3 10.71% 1 20.00%
ingo molnar ingo molnar 2 7.14% 1 20.00%
amy griffis amy griffis 2 7.14% 1 20.00%
denis v. lunev denis v. lunev 2 7.14% 1 20.00%
Total 28 100.00% 5 100.00%

/* Run custom bind function on netlink socket group connect or bind requests. */


static int audit_bind(struct net *net, int group)
{
	if (!capable(CAP_AUDIT_READ))
		return -EPERM;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
richard guy briggs richard guy briggs 24 82.76% 1 50.00%
johannes berg johannes berg 5 17.24% 1 50.00%
Total 29 100.00% 2 100.00%



static int __net_init audit_net_init(struct net *net)
{
	struct netlink_kernel_cfg cfg = {
		.input	= audit_receive,
		.bind	= audit_bind,
		.flags	= NL_CFG_F_NONROOT_RECV,
		.groups	= AUDIT_NLGRP_MAX,
        };

	struct audit_net *aunet = net_generic(net, audit_net_id);

	aunet->nlsk = netlink_kernel_create(net, NETLINK_AUDIT, &cfg);
	if (aunet->nlsk == NULL) {
		audit_panic("cannot initialize netlink socket in namespace");
		return -ENOMEM;
	}
	aunet->nlsk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
richard guy briggs richard guy briggs 49 52.13% 3 33.33%
andrew morton andrew morton 19 20.21% 1 11.11%
pablo neira ayuso pablo neira ayuso 13 13.83% 1 11.11%
gao feng gao feng 6 6.38% 1 11.11%
david woodhouse david woodhouse 5 5.32% 1 11.11%
chris wright chris wright 1 1.06% 1 11.11%
eric w. biederman eric w. biederman 1 1.06% 1 11.11%
Total 94 100.00% 9 100.00%



static void __net_exit audit_net_exit(struct net *net)
{
	struct audit_net *aunet = net_generic(net, audit_net_id);
	struct sock *sock = aunet->nlsk;
	mutex_lock(&audit_cmd_mutex);
	if (sock == audit_sock)
		auditd_reset();
	mutex_unlock(&audit_cmd_mutex);

	netlink_kernel_release(sock);
	aunet->nlsk = NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
richard guy briggs richard guy briggs 58 89.23% 2 50.00%
americo wang americo wang 5 7.69% 1 25.00%
paul moore paul moore 2 3.08% 1 25.00%
Total 65 100.00% 4 100.00%


static struct pernet_operations audit_net_ops __net_initdata = {
	.init = audit_net_init,
	.exit = audit_net_exit,
	.id = &audit_net_id,
	.size = sizeof(struct audit_net),
};

/* Initialize audit support at boot time. */


static int __init audit_init(void)
{
	int i;

	if (audit_initialized == AUDIT_DISABLED)
		return 0;

	pr_info("initializing netlink subsys (%s)\n",
		audit_default ? "enabled" : "disabled");
	register_pernet_subsys(&audit_net_ops);

	skb_queue_head_init(&audit_queue);
	skb_queue_head_init(&audit_retry_queue);
	skb_queue_head_init(&audit_hold_queue);
	audit_initialized = AUDIT_INITIALIZED;
	audit_enabled = audit_default;
	audit_ever_enabled |= !!audit_default;

	for (i = 0; i < AUDIT_INODE_BUCKETS; i++)
		INIT_LIST_HEAD(&audit_inode_hash[i]);

	kauditd_task = kthread_run(kauditd_thread, NULL, "kauditd");
	if (IS_ERR(kauditd_task)) {
		int err = PTR_ERR(kauditd_task);
		panic("audit: failed to start the kauditd thread (%d)\n", err);
	}

	audit_log(NULL, GFP_KERNEL, AUDIT_KERNEL, "initialized");

	return 0;
}
Contributors
Person Tokens Prop Commits CommitProp
paul moore paul moore 49 34.75% 3 27.27%
richard guy briggs richard guy briggs 36 25.53% 1 9.09%
amy griffis amy griffis 22 15.60% 1 9.09%
eric paris eric paris 15 10.64% 3 27.27%
andrew morton andrew morton 11 7.80% 1 9.09%
david woodhouse david woodhouse 7 4.96% 1 9.09%
joe perches joe perches 1 0.71% 1 9.09%
Total 141 100.00% 11 100.00%


__initcall(audit_init);

/* Process kernel command-line parameter at boot time.  audit=0 or audit=1. */


static int __init audit_enable(char *str)
{
	audit_default = !!simple_strtol(str, NULL, 0);
	if (!audit_default)
		audit_initialized = AUDIT_DISABLED;

	pr_info("%s\n", audit_default ?
		"enabled (after initialization)" : "disabled (until reboot)");

	return 1;
}
Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 31 65.96% 1 20.00%
eric paris eric paris 11 23.40% 1 20.00%
gao feng gao feng 3 6.38% 1 20.00%
joe perches joe perches 1 2.13% 1 20.00%
hirofumi ogawa hirofumi ogawa 1 2.13% 1 20.00%
Total 47 100.00% 5 100.00%

__setup("audit=", audit_enable);

/* Process kernel command-line parameter at boot time.
 * audit_backlog_limit=<n> */


static int __init audit_backlog_limit_set(char *str)
{
	u32 audit_backlog_limit_arg;

	pr_info("audit_backlog_limit: ");
	if (kstrtouint(str, 0, &audit_backlog_limit_arg)) {
		pr_cont("using default of %u, unable to parse %s\n",
			audit_backlog_limit, str);
		return 1;
	}

	audit_backlog_limit = audit_backlog_limit_arg;
	pr_cont("%d\n", audit_backlog_limit);

	return 1;
}
Contributors
Person Tokens Prop Commits CommitProp
richard guy briggs richard guy briggs 54 91.53% 1 33.33%
joe perches joe perches 5 8.47% 2 66.67%
Total 59 100.00% 3 100.00%

__setup("audit_backlog_limit=", audit_backlog_limit_set);



static void audit_buffer_free(struct audit_buffer *ab)
{
	unsigned long flags;

	if (!ab)
		return;

	kfree_skb(ab->skb);
	spin_lock_irqsave(&audit_freelist_lock, flags);
	if (audit_freelist_count > AUDIT_MAXFREE)
		kfree(ab);
	else {
		audit_freelist_count++;
		list_add(&ab->list, &audit_freelist);
	}
	spin_unlock_irqrestore(&audit_freelist_lock, flags);
}

Contributors
Person Tokens Prop Commits CommitProp
chris wright chris wright 45 62.50% 3 60.00%
andrew morton andrew morton 22 30.56% 1 20.00%
serge hallyn serge hallyn 5 6.94% 1 20.00%
Total 72 100.00% 5 100.00%



static struct audit_buffer * audit_buffer_alloc(struct audit_context *ctx,
						gfp_t gfp_mask, int type)
{
	unsigned long flags;
	struct audit_buffer *ab = NULL;
	struct nlmsghdr *nlh;

	spin_lock_irqsave(&audit_freelist_lock, flags);
	if (!list_empty(&audit_freelist)) {
		ab = list_entry(audit_freelist.next,
				struct audit_buffer, list);
		list_del(&ab->list);
		--audit_freelist_count;
	}
	spin_unlock_irqrestore(&audit_freelist_lock, flags);

	if (!ab) {
		ab = kmalloc(sizeof(*ab), gfp_mask);
		if (!ab)
			goto err;
	}

	ab->ctx = ctx;
	ab->gfp_mask = gfp_mask;

	ab->skb = nlmsg_new(AUDIT_BUFSIZ, gfp_mask);
	if (!ab->skb)
		goto err;

	nlh = nlmsg_put(ab->skb, 0, 0, type, 0, 0);
	if (!nlh)
		goto out_kfree_skb;

	return ab;

out_kfree_skb:
	kfree_skb(ab->skb);
	ab->skb = NULL;
err:
	audit_buffer_free(ab);
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 74 36.45% 1 11.11%
chris wright chris wright 54 26.60% 3 33.33%
eric paris eric paris 32 15.76% 1 11.11%
steve grubb steve grubb 29 14.29% 1 11.11%
david s. miller david s. miller 11 5.42% 1 11.11%
david woodhouse david woodhouse 2 0.99% 1 11.11%
al viro al viro 1 0.49% 1 11.11%
Total 203 100.00% 9 100.00%

/**
 * audit_serial - compute a serial number for the audit record
 *
 * Compute a serial number for the audit record.  Audit records are
 * written to user-space as soon as they are generated, so a complete
 * audit record may be written in several pieces.  The timestamp of the
 * record and this serial number are used by the user-space tools to
 * determine which pieces belong to the same audit record.  The
 * (timestamp,serial) tuple is unique for each syscall and is live from
 * syscall entry to syscall exit.
 *
 * NOTE: Another possibility is to store the formatted records off the
 * audit context (for those records that have a context), and emit them
 * all at syscall exit.  However, this could delay the reporting of
 * significant errors until syscall exit (or never, if the system
 * halts).
 */


unsigned int audit_serial(void)
{
	static atomic_t serial = ATOMIC_INIT(0);

	return atomic_add_return(1, &serial);
}

Contributors
Person Tokens Prop Commits CommitProp
david woodhouse david woodhouse 18 69.23% 2 66.67%
richard guy briggs richard guy briggs 8 30.77% 1 33.33%
Total 26 100.00% 3 100.00%



static inline void audit_get_stamp(struct audit_context *ctx,
				   struct timespec *t, unsigned int *serial)
{
	if (!ctx || !auditsc_get_stamp(ctx, t, serial)) {
		*t = CURRENT_TIME;
		*serial = audit_serial();
	}
}

Contributors
Person Tokens Prop Commits CommitProp
david woodhouse david woodhouse 38 76.00% 1 20.00%
andrew morton andrew morton 5 10.00% 1 20.00%
al viro al viro 3 6.00% 1 20.00%
paul moore paul moore 3 6.00% 1 20.00%
richard guy briggs richard guy briggs 1 2.00% 1 20.00%
Total 50 100.00% 5 100.00%

/**
 * audit_log_start - obtain an audit buffer
 * @ctx: audit_context (may be NULL)
 * @gfp_mask: type of allocation
 * @type: audit message type
 *
 * Returns audit_buffer pointer on success or NULL on error.
 *
 * Obtain an audit buffer.  This routine does locking to obtain the
 * audit buffer, but then no locking is required for calls to
 * audit_log_*format.  If the task (ctx) is a task that is currently in a
 * syscall, then the syscall is marked as auditable and an audit record
 * will be written at syscall exit.  If there is no associated task, then
 * task context (ctx) should be NULL.
 */


struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
				     int type)
{
	struct audit_buffer *ab;
	struct timespec t;
	unsigned int uninitialized_var(serial);

	if (audit_initialized != AUDIT_INITIALIZED)
		return NULL;

	if (unlikely(!audit_filter(type, AUDIT_FILTER_TYPE)))
		return NULL;

	/* don't ever fail/sleep on these two conditions:
         * 1. auditd generated record - since we need auditd to drain the
         *    queue; also, when we are checking for auditd, compare PIDs using
         *    task_tgid_vnr() since auditd_pid is set in audit_receive_msg()
         *    using a PID anchored in the caller's namespace
         * 2. audit command message - record types 1000 through 1099 inclusive
         *    are command messages/records used to manage the kernel subsystem
         *    and the audit userspace, blocking on these messages could cause
         *    problems under load so don't do it (note: not all of these
         *    command types are valid as record types, but it is quicker to
         *    just check two ints than a series of ints in a if/switch stmt) */
	if (!((audit_pid && audit_pid == task_tgid_vnr(current)) ||
	      (type >= 1000 && type <= 1099))) {
		long sleep_time = audit_backlog_wait_time;

		while (audit_backlog_limit &&
		       (skb_queue_len(&audit_queue) > audit_backlog_limit)) {
			/* wake kauditd to try and flush the queue */
			wake_up_interruptible(&kauditd_wait);

			/* sleep if we are allowed and we haven't exhausted our
                         * backlog wait limit */
			if ((gfp_mask & __GFP_DIRECT_RECLAIM) &&
			    (sleep_time > 0)) {
				DECLARE_WAITQUEUE(wait, current);

				add_wait_queue_exclusive(&audit_backlog_wait,
							 &wait);
				set_current_state(TASK_UNINTERRUPTIBLE);
				sleep_time = schedule_timeout(sleep_time);
				remove_wait_queue(&audit_backlog_wait, &wait);
			} else {
				if (audit_rate_check() && printk_ratelimit())
					pr_warn("audit_backlog=%d > audit_backlog_limit=%d\n",
						skb_queue_len(&audit_queue),
						audit_backlog_limit);
				audit_log_lost("backlog limit exceeded");
				return NULL;
			}
		}
	}

	ab = audit_buffer_alloc(ctx, gfp_mask, type);
	if (!ab) {
		audit_log_lost("out of memory in audit_log_start");
		return NULL;
	}

	audit_get_stamp(ab->ctx, &t, &serial);
	audit_log_format(ab, "audit(%lu.%03lu:%u): ",
			 t.tv_sec, t.tv_nsec/1000000, serial);

	return ab;
}

Contributors
Person Tokens Prop Commits CommitProp
paul moore paul moore 76 28.90% 3 12.50%
chris wright chris wright 51 19.39% 4 16.67%
david woodhouse david woodhouse 50 19.01% 3 12.50%
andrew morton andrew morton 47 17.87% 3 12.50%
dustin kirkland dustin kirkland 12 4.56% 1 4.17%
richard guy briggs richard guy briggs 6 2.28% 2 8.33%
toshiyuki okajima toshiyuki okajima 6 2.28% 1 4.17%
eric paris eric paris 5 1.90% 2 8.33%
steve grubb steve grubb 4 1.52% 1 4.17%
konstantin khlebnikov konstantin khlebnikov 2 0.76% 1 4.17%
joe perches joe perches 2 0.76% 1 4.17%
mel gorman mel gorman 1 0.38% 1 4.17%
al viro al viro 1 0.38% 1 4.17%
Total 263 100.00% 24 100.00%

/**
 * audit_expand - expand skb in the audit buffer
 * @ab: audit_buffer
 * @extra: space to add at tail of the skb
 *
 * Returns 0 (no space) on failed expansion, or available space if
 * successful.
 */


static inline int audit_expand(struct audit_buffer *ab, int extra)
{
	struct sk_buff *skb = ab->skb;
	int oldtail = skb_tailroom(skb);
	int ret = pskb_expand_head(skb, 0, extra, ab->gfp_mask);
	int newtail = skb_tailroom(skb);

	if (ret < 0) {
		audit_log_lost("out of memory in audit_expand");
		return 0;
	}

	skb->truesize += newtail - oldtail;
	return newtail;
}

Contributors
Person Tokens Prop Commits CommitProp
chris wright chris wright 50 60.24% 2 40.00%
herbert xu herbert xu 26 31.33% 1 20.00%
david woodhouse david woodhouse 7 8.43% 2 40.00%
Total 83 100.00% 5 100.00%

/*
 * Format an audit message into the audit buffer.  If there isn't enough
 * room in the audit buffer, more room will be allocated and vsnprint
 * will be called a second time.  Currently, we assume that a printk
 * can't format message larger than 1024 bytes, so we don't either.
 */


static void audit_log_vformat(struct audit_buffer *ab, const char *fmt,
			      va_list args)
{
	int len, avail;
	struct sk_buff *skb;
	va_list args2;

	if (!ab)
		return;

	BUG_ON(!ab->skb);
	skb = ab->skb;
	avail = skb_tailroom(skb);
	if (avail == 0) {
		avail = audit_expand(ab, AUDIT_BUFSIZ);
		if (!avail)
			goto out;
	}
	va_copy(args2, args);
	len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args);
	if (len >= avail) {
		/* The printk buffer is 1024 bytes long, so if we get
                 * here and AUDIT_BUFSIZ is at least 1024, then we can
                 * log everything that printk could have logged. */
		avail = audit_expand(ab,
			max_t(unsigned, AUDIT_BUFSIZ, 1+len-avail));
		if (!avail)
			goto out_va_end;
		len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args2);
	}
	if (len > 0)
		skb_put(skb, len);
out_va_end:
	va_end(args2);
out:
	return;
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 88 48.09% 1 10.00%
chris wright chris wright 49 26.78% 2 20.00%
david woodhouse david woodhouse 26 14.21% 4 40.00%
jesper juhl jesper juhl 8 4.37% 1 10.00%
arnaldo carvalho de melo arnaldo carvalho de melo 6 3.28% 1 10.00%
steve grubb steve grubb 6 3.28% 1 10.00%
Total 183 100.00% 10 100.00%

/**
 * audit_log_format - format a message into the audit buffer.
 * @ab: audit_buffer
 * @fmt: format string
 * @...: optional parameters matching @fmt string
 *
 * All the work is done in audit_log_vformat.
 */


void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
{
	va_list args;

	if (!ab)
		return;
	va_start(args, fmt);
	audit_log_vformat(ab, fmt, args);
	va_end(args);
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 46 97.87% 1 50.00%
david woodhouse david woodhouse 1 2.13% 1 50.00%
Total 47 100.00% 2 100.00%

/**
 * audit_log_hex - convert a buffer to hex and append it to the audit skb
 * @ab: the audit_buffer
 * @buf: buffer to convert to hex
 * @len: length of @buf to be converted
 *
 * No return value; failure to expand is silently ignored.
 *
 * This function will take the passed buf and convert it into a string of
 * ascii hex digits. The new string is placed onto the skb.
 */


void audit_log_n_hex(struct audit_buffer *ab, const unsigned char *buf,
		size_t len)
{
	int i, avail, new_len;
	unsigned char *ptr;
	struct sk_buff *skb;

	if (!ab)
		return;

	BUG_ON(!ab->skb);
	skb = ab->skb;
	avail = skb_tailroom(skb);
	new_len = len<<1;
	if (new_len >= avail) {
		/* Round the buffer request up to the next multiple */
		new_len = AUDIT_BUFSIZ*(((new_len-avail)/AUDIT_BUFSIZ) + 1);
		avail = audit_expand(ab, new_len);
		if (!avail)
			return;
	}

	ptr = skb_tail_pointer(skb);
	for (i = 0; i < len; i++)
		ptr = hex_byte_pack_upper(ptr, buf[i]);
	*ptr = 0;
	skb_put(skb, len << 1); /* new string is twice the old string */
}

Contributors
Person Tokens Prop Commits CommitProp
steve grubb steve grubb 109 68.99% 1 16.67%
david woodhouse david woodhouse 35 22.15% 1 16.67%
amy griffis amy griffis 6 3.80% 1 16.67%
joe perches joe perches 4 2.53% 1 16.67%
arnaldo carvalho de melo arnaldo carvalho de melo 3 1.90% 1 16.67%
eric paris eric paris 1 0.63% 1 16.67%
Total 158 100.00% 6 100.00%

/*
 * Format a string of no more than slen characters into the audit buffer,
 * enclosed in quote marks.
 */


void audit_log_n_string(struct audit_buffer *ab, const char *string,
			size_t slen)
{
	int avail, new_len;
	unsigned char *ptr;
	struct sk_buff *skb;

	if (!ab)
		return;

	BUG_ON(!ab->skb);
	skb = ab->skb;
	avail = skb_tailroom(skb);
	new_len = slen + 3;	/* enclosing quotes + null terminator */
	if (new_len > avail) {
		avail = audit_expand(ab, new_len);
		if (!avail)
			return;
	}
	ptr = skb_tail_pointer(skb);
	*ptr++ = '"';
	memcpy(ptr, string, slen);
	ptr += slen;
	*ptr++ = '"';
	*ptr = 0;
	skb_put(skb, slen + 2);	/* don't include null terminator */
}

Contributors
Person Tokens Prop Commits CommitProp
amy griffis amy griffis 128 93.43% 2 40.00%
arnaldo carvalho de melo arnaldo carvalho de melo 3 2.19% 1 20.00%
eric paris eric paris 3 2.19% 1 20.00%
al viro al viro 3 2.19% 1 20.00%
Total 137 100.00% 5 100.00%

/**
 * audit_string_contains_control - does a string need to be logged in hex
 * @string: string to be checked
 * @len: max length of the string to check
 */


bool audit_string_contains_control(const char *string, size_t len)
{
	const unsigned char *p;
	for (p = string; p < (const unsigned char *)string + len; p++) {
		if (*p == '"' || *p < 0x21 || *p > 0x7e)
			return true;
	}
	return false;
}

Contributors
Person Tokens Prop Commits CommitProp
david woodhouse david woodhouse 24 36.92% 1 12.50%
miloslav trmac miloslav trmac 21 32.31% 1 12.50%
eric paris eric paris 9 13.85% 1 12.50%
amy griffis amy griffis 5 7.69% 1 12.50%
yaowei bai yaowei bai 3 4.62% 1 12.50%
andrew morton andrew morton 1 1.54% 1 12.50%
steve grubb steve grubb 1 1.54% 1 12.50%
vesa-matti kari vesa-matti kari 1 1.54% 1 12.50%
Total 65 100.00% 8 100.00%

/**
 * audit_log_n_untrustedstring - log a string that may contain random characters
 * @ab: audit_buffer
 * @len: length of string (not including trailing null)
 * @string: string to be logged
 *
 * This code will escape a string that is passed to it if the string
 * contains a control character, unprintable character, double quote mark,
 * or a space. Unescaped strings will start and end with a double quote mark.
 * Strings that are escaped are printed in hex (2 digits per char).
 *
 * The caller specifies the number of characters in the string to log, which may
 * or may not be the entire string.
 */


void audit_log_n_untrustedstring(struct audit_buffer *ab, const char *string,
				 size_t len)
{
	if (audit_string_contains_control(string, len))
		audit_log_n_hex(ab, string, len);
	else
		audit_log_n_string(ab, string, len);
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 29 63.04% 2 33.33%
david woodhouse david woodhouse 14 30.43% 1 16.67%
amy griffis amy griffis 1 2.17% 1 16.67%
andrew morton andrew morton 1 2.17% 1 16.67%
al viro al viro 1 2.17% 1 16.67%
Total 46 100.00% 6 100.00%

/**
 * audit_log_untrustedstring - log a string that may contain random characters
 * @ab: audit_buffer
 * @string: string to be logged
 *
 * Same as audit_log_n_untrustedstring(), except that strlen is used to
 * determine string length.
 */


void audit_log_untrustedstring(struct audit_buffer *ab, const char *string)
{
	audit_log_n_untrustedstring(ab, string, strlen(string));
}

Contributors
Person Tokens Prop Commits CommitProp
amy griffis amy griffis 23 85.19% 1 33.33%
eric paris eric paris 4 14.81% 2 66.67%
Total 27 100.00% 3 100.00%

/* This is a helper-function to print the escaped d_path */


void audit_log_d_path(struct audit_buffer *ab, const char *prefix,
		      const struct path *path)
{
	char *p, *pathname;

	if (prefix)
		audit_log_format(ab, "%s", prefix);

	/* We will allow 11 spaces for ' (deleted)' to be appended */
	pathname = kmalloc(PATH_MAX+11, ab->gfp_mask);
	if (!pathname) {
		audit_log_string(ab, "<no_memory>");
		return;
	}
	p = d_path(path, pathname, PATH_MAX+11);
	if (IS_ERR(p)) { /* Should never happen since we send PATH_MAX */
		/* FIXME: can we save some information here? */
		audit_log_string(ab, "<too_long>");
	} else
		audit_log_untrustedstring(ab, p);
	kfree(pathname);
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 64 56.14% 1 11.11%
steve grubb steve grubb 26 22.81% 1 11.11%
jan blunck jan blunck 9 7.89% 1 11.11%
eric paris eric paris 4 3.51% 1 11.11%
chris wright chris wright 4 3.51% 1 11.11%
david woodhouse david woodhouse 3 2.63% 1 11.11%
andrea arcangeli andrea arcangeli 2 1.75% 1 11.11%
kees cook kees cook 1 0.88% 1 11.11%
al viro al viro 1 0.88% 1 11.11%
Total 114 100.00% 9 100.00%



void audit_log_session_info(struct audit_buffer *ab)
{
	unsigned int sessionid = audit_get_sessionid(current);
	uid_t auid = from_kuid(&init_user_ns, audit_get_loginuid(current));

	audit_log_format(ab, " auid=%u ses=%u", auid, sessionid);
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 43 97.73% 2 66.67%
richard guy briggs richard guy briggs 1 2.27% 1 33.33%
Total 44 100.00% 3 100.00%



void audit_log_key(struct audit_buffer *ab, char *key)
{
	audit_log_format(ab, " key=");
	if (key)
		audit_log_untrustedstring(ab, key);
	else
		audit_log_format(ab, "(null)");
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 40 100.00% 1 100.00%
Total 40 100.00% 1 100.00%



void audit_log_cap(struct audit_buffer *ab, char *prefix, kernel_cap_t *cap)
{
	int i;

	audit_log_format(ab, " %s=", prefix);
	CAP_FOR_EACH_U32(i) {
		audit_log_format(ab, "%08x",
				 cap->cap[CAP_LAST_U32 - i]);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 28 53.85% 2 66.67%
kees cook kees cook 24 46.15% 1 33.33%
Total 52 100.00% 3 100.00%



static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name)
{
	kernel_cap_t *perm = &name->fcap.permitted;
	kernel_cap_t *inh = &name->fcap.inheritable;
	int log = 0;

	if (!cap_isclear(*perm)) {
		audit_log_cap(ab, "cap_fp", perm);
		log = 1;
	}
	if (!cap_isclear(*inh)) {
		audit_log_cap(ab, "cap_fi", inh);
		log = 1;
	}

	if (log)
		audit_log_format(ab, " cap_fe=%d cap_fver=%x",
				 name->fcap.fE, name->fcap_ver);
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 89 79.46% 1 33.33%
kees cook kees cook 22 19.64% 1 33.33%
richard guy briggs richard guy briggs 1 0.89% 1 33.33%
Total 112 100.00% 3 100.00%



static inline int audit_copy_fcaps(struct audit_names *name,
				   const struct dentry *dentry)
{
	struct cpu_vfs_cap_data caps;
	int rc;

	if (!dentry)
		return 0;

	rc = get_vfs_caps_from_disk(dentry, &caps);
	if (rc)
		return rc;

	name->fcap.permitted = caps.permitted;
	name->fcap.inheritable = caps.inheritable;
	name->fcap.fE = !!(caps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
	name->fcap_ver = (caps.magic_etc & VFS_CAP_REVISION_MASK) >>
				VFS_CAP_REVISION_SHIFT;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 100 97.09% 1 50.00%
kees cook kees cook 3 2.91% 1 50.00%
Total 103 100.00% 2 100.00%

/* Copy inode data into an audit_names. */


void audit_copy_inode(struct audit_names *name, const struct dentry *dentry,
		      struct inode *inode)
{
	name->ino   = inode->i_ino;
	name->dev   = inode->i_sb->s_dev;
	name->mode  = inode->i_mode;
	name->uid   = inode->i_uid;
	name->gid   = inode->i_gid;
	name->rdev  = inode->i_rdev;
	security_inode_getsecid(inode, &name->osid);
	audit_copy_fcaps(name, dentry);
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 78 88.64% 1 50.00%
kees cook kees cook 10 11.36% 1 50.00%
Total 88 100.00% 2 100.00%

/**
 * audit_log_name - produce AUDIT_PATH record from struct audit_names
 * @context: audit_context for the task
 * @n: audit_names structure with reportable details
 * @path: optional path to report instead of audit_names->name
 * @record_num: record number to report when handling a list of names
 * @call_panic: optional pointer to int that will be updated if secid fails
 */


void audit_log_name(struct audit_context *context, struct audit_names *n,
		    const struct path *path, int record_num, int *call_panic)
{
	struct audit_buffer *ab;
	ab = audit_log_start(context, GFP_KERNEL, AUDIT_PATH);
	if (!ab)
		return;

	audit_log_format(ab, "item=%d", record_num);

	if (path)
		audit_log_d_path(ab, " name=", path);
	else if (n->name) {
		switch (n->name_len) {
		case AUDIT_NAME_FULL:
			/* log the full path */
			audit_log_format(ab, " name=");
			audit_log_untrustedstring(ab, n->name->name);
			break;
		case 0:
			/* name was specified as a relative path and the
                         * directory component is the cwd */
			audit_log_d_path(ab, " name=", &context->pwd);
			break;
		default:
			/* log the name's directory component */
			audit_log_format(ab, " name=");
			audit_log_n_untrustedstring(ab, n->name->name,
						    n->name_len);
		}
	} else
		audit_log_format(ab, " name=(null)");

	if (n->ino != AUDIT_INO_UNSET)
		audit_log_format(ab, " inode=%lu"
				 " dev=%02x:%02x mode=%#ho"
				 " ouid=%u ogid=%u rdev=%02x:%02x",
				 n->ino,
				 MAJOR(n->dev),
				 MINOR(n->dev),
				 n->mode,
				 from_kuid(&init_user_ns, n->uid),
				 from_kgid(&init_user_ns, n->gid),
				 MAJOR(n->rdev),
				 MINOR(n->rdev));
	if (n->osid != 0) {
		char *ctx = NULL;
		u32 len;
		if (security_secid_to_secctx(
			n->osid, &ctx, &len)) {
			audit_log_format(ab, " osid=%u", n->osid);
			if (call_panic)
				*call_panic = 2;
		} else {
			audit_log_format(ab, " obj=%s", ctx);
			security_release_secctx(ctx, len);
		}
	}

	/* log the audit_names record type */
	audit_log_format(ab, " nametype=");
	switch(n->type) {
	case AUDIT_TYPE_NORMAL:
		audit_log_format(ab, "NORMAL");
		break;
	case AUDIT_TYPE_PARENT:
		audit_log_format(ab, "PARENT");
		break;
	case AUDIT_TYPE_CHILD_DELETE:
		audit_log_format(ab, "DELETE");
		break;
	case AUDIT_TYPE_CHILD_CREATE:
		audit_log_format(ab, "CREATE");
		break;
	default:
		audit_log_format(ab, "UNKNOWN");
		break;
	}

	audit_log_fcaps(ab, n);
	audit_log_end(ab);
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 319 81.79% 1 25.00%
jeff layton jeff layton 69 17.69% 1 25.00%
richard guy briggs richard guy briggs 1 0.26% 1 25.00%
al viro al viro 1 0.26% 1 25.00%
Total 390 100.00% 4 100.00%



int audit_log_task_context(struct audit_buffer *ab)
{
	char *ctx = NULL;
	unsigned len;
	int error;
	u32 sid;

	security_task_getsecid(current, &sid);
	if (!sid)
		return 0;

	error = security_secid_to_secctx(sid, &ctx, &len);
	if (error) {
		if (error != -EINVAL)
			goto error_path;
		return 0;
	}

	audit_log_format(ab, " subj=%s", ctx);
	security_release_secctx(ctx, len);
	return 0;

error_path:
	audit_panic("error in audit_log_task_context");
	return error;
}
Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 102 100.00% 1 100.00%
Total 102 100.00% 1 100.00%


EXPORT_SYMBOL(audit_log_task_context);



void audit_log_d_path_exe(struct audit_buffer *ab,
			  struct mm_struct *mm)
{
	struct file *exe_file;

	if (!mm)
		goto out_null;

	exe_file = get_mm_exe_file(mm);
	if (!exe_file)
		goto out_null;

	audit_log_d_path(ab, " exe=", &exe_file->f_path);
	fput(exe_file);
	return;
out_null:
	audit_log_format(ab, " exe=(null)");
}

Contributors
Person Tokens Prop Commits CommitProp
davidlohr bueso davidlohr bueso 70 100.00% 2 100.00%
Total 70 100.00% 2 100.00%



struct tty_struct *audit_get_tty(struct task_struct *tsk)
{
	struct tty_struct *tty = NULL;
	unsigned long flags;

	spin_lock_irqsave(&tsk->sighand->siglock, flags);
	if (tsk->signal)
		tty = tty_kref_get(tsk->signal->tty);
	spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
	return tty;
}

Contributors
Person Tokens Prop Commits CommitProp
richard guy briggs richard guy briggs 67 100.00% 1 100.00%
Total 67 100.00% 1 100.00%



void audit_put_tty(struct tty_struct *tty)
{
	tty_kref_put(tty);
}

Contributors
Person Tokens Prop Commits CommitProp
richard guy briggs richard guy briggs 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%



void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
{
	const struct cred *cred;
	char comm[sizeof(tsk->comm)];
	struct tty_struct *tty;

	if (!ab)
		return;

	/* tsk == current */
	cred = current_cred();
	tty = audit_get_tty(tsk);
	audit_log_format(ab,
			 " ppid=%d pid=%d auid=%u uid=%u gid=%u"
			 " euid=%u suid=%u fsuid=%u"
			 " egid=%u sgid=%u fsgid=%u tty=%s ses=%u",
			 task_ppid_nr(tsk),
			 task_tgid_nr(tsk),
			 from_kuid(&init_user_ns, audit_get_loginuid(tsk)),
			 from_kuid(&init_user_ns, cred->uid),
			 from_kgid(&init_user_ns, cred->gid),
			 from_kuid(&init_user_ns, cred->euid),
			 from_kuid(&init_user_ns, cred->suid),
			 from_kuid(&init_user_ns, cred->fsuid),
			 from_kgid(&init_user_ns, cred->egid),
			 from_kgid(&init_user_ns, cred->sgid),
			 from_kgid(&init_user_ns, cred->fsgid),
			 tty ? tty_name(tty) : "(none)",
			 audit_get_sessionid(tsk));
	audit_put_tty(tty);
	audit_log_format(ab, " comm=");
	audit_log_untrustedstring(ab, get_task_comm(comm, tsk));
	audit_log_d_path_exe(ab, tsk->mm);
	audit_log_task_context(ab);
}
Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 181 83.03% 1 11.11%
richard guy briggs richard guy briggs 32 14.68% 5 55.56%
davidlohr bueso davidlohr bueso 2 0.92% 1 11.11%
paul davies c paul davies c 2 0.92% 1 11.11%
paul moore paul moore 1 0.46% 1 11.11%
Total 218 100.00% 9 100.00%


EXPORT_SYMBOL(audit_log_task_info);

/**
 * audit_log_link_denied - report a link restriction denial
 * @operation: specific link operation
 * @link: the path that triggered the restriction
 */


void audit_log_link_denied(const char *operation, const struct path *link)
{
	struct audit_buffer *ab;
	struct audit_names *name;

	name = kzalloc(sizeof(*name), GFP_NOFS);
	if (!name)
		return;

	/* Generate AUDIT_ANOM_LINK with subject, operation, outcome. */
	ab = audit_log_start(current->audit_context, GFP_KERNEL,
			     AUDIT_ANOM_LINK);
	if (!ab)
		goto out;
	audit_log_format(ab, "op=%s", operation);
	audit_log_task_info(ab, current);
	audit_log_format(ab, " res=0");
	audit_log_end(ab);

	/* Generate AUDIT_PATH record with object. */
	name->type = AUDIT_TYPE_NORMAL;
	audit_copy_inode(name, link->dentry, d_backing_inode(link->dentry));
	audit_log_name(current->audit_context, name, link, 0, NULL);
out:
	kfree(name);
}

Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 119 85.00% 1 25.00%
kees cook kees cook 17 12.14% 1 25.00%
david howells david howells 3 2.14% 1 25.00%
al viro al viro 1 0.71% 1 25.00%
Total 140 100.00% 4 100.00%

/**
 * audit_log_end - end one audit record
 * @ab: the audit_buffer
 *
 * We can not do a netlink send inside an irq context because it blocks (last
 * arg, flags, is not set to MSG_DONTWAIT), so the audit buffer is placed on a
 * queue and a tasklet is scheduled to remove them from the queue outside the
 * irq context.  May be called in any context.
 */


void audit_log_end(struct audit_buffer *ab)
{
	if (!ab)
		return;
	if (!audit_rate_check()) {
		audit_log_lost("rate limit exceeded");
	} else {
		skb_queue_tail(&audit_queue, ab->skb);
		wake_up_interruptible(&kauditd_wait);
		ab->skb = NULL;
	}
	audit_buffer_free(ab);
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 38 64.41% 1 25.00%
david woodhouse david woodhouse 14 23.73% 1 25.00%
eric paris eric paris 6 10.17% 1 25.00%
paul moore paul moore 1 1.69% 1 25.00%
Total 59 100.00% 4 100.00%

/**
 * audit_log - Log an audit record
 * @ctx: audit context
 * @gfp_mask: type of allocation
 * @type: audit message type
 * @fmt: format string to use
 * @...: variable parameters matching the format string
 *
 * This is a convenience function that calls audit_log_start,
 * audit_log_vformat, and audit_log_end.  It may be called
 * in any context.
 */


void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
	       const char *fmt, ...)
{
	struct audit_buffer *ab;
	va_list args;

	ab = audit_log_start(ctx, gfp_mask, type);
	if (ab) {
		va_start(args, fmt);
		audit_log_vformat(ab, fmt, args);
		va_end(args);
		audit_log_end(ab);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 63 85.14% 1 20.00%
david woodhouse david woodhouse 5 6.76% 1 20.00%
chris wright chris wright 4 5.41% 1 20.00%
steve grubb steve grubb 1 1.35% 1 20.00%
al viro al viro 1 1.35% 1 20.00%
Total 74 100.00% 5 100.00%

#ifdef CONFIG_SECURITY
/**
 * audit_log_secctx - Converts and logs SELinux context
 * @ab: audit_buffer
 * @secid: security number
 *
 * This is a helper function that calls security_secid_to_secctx to convert
 * secid to secctx and then adds the (converted) SELinux context to the audit
 * log by calling audit_log_format, thus also preventing leak of internal secid
 * to userspace. If secid cannot be converted audit_panic is called.
 */


void audit_log_secctx(struct audit_buffer *ab, u32 secid)
{
	u32 len;
	char *secctx;

	if (security_secid_to_secctx(secid, &secctx, &len)) {
		audit_panic("Cannot convert secid to context");
	} else {
		audit_log_format(ab, " obj=%s", secctx);
		security_release_secctx(secctx, len);
	}
}
Contributors
Person Tokens Prop Commits CommitProp
mr dash four mr dash four 59 100.00% 1 100.00%
Total 59 100.00% 1 100.00%


EXPORT_SYMBOL(audit_log_secctx);
#endif


EXPORT_SYMBOL(audit_log_start);

EXPORT_SYMBOL(audit_log_end);

EXPORT_SYMBOL(audit_log_format);

EXPORT_SYMBOL(audit_log);
Overall Contributors
Person Tokens Prop Commits CommitProp
eric paris eric paris 2464 29.22% 34 15.04%
andrew morton andrew morton 1396 16.56% 6 2.65%
richard guy briggs richard guy briggs 1105 13.10% 43 19.03%
paul moore paul moore 584 6.93% 11 4.87%
al viro al viro 478 5.67% 9 3.98%
steve grubb steve grubb 417 4.95% 8 3.54%
david woodhouse david woodhouse 350 4.15% 15 6.64%
chris wright chris wright 265 3.14% 6 2.65%
amy griffis amy griffis 250 2.96% 4 1.77%
miloslav trmac miloslav trmac 178 2.11% 2 0.88%
serge hallyn serge hallyn 105 1.25% 3 1.33%
eric w. biederman eric w. biederman 99 1.17% 12 5.31%
kees cook kees cook 97 1.15% 3 1.33%
mr dash four mr dash four 78 0.93% 1 0.44%
davidlohr bueso davidlohr bueso 75 0.89% 2 0.88%
jeff layton jeff layton 69 0.82% 1 0.44%
peter hurley peter hurley 68 0.81% 2 0.88%
joe perches joe perches 44 0.52% 3 1.33%
herbert xu herbert xu 30 0.36% 2 0.88%
david s. miller david s. miller 24 0.28% 1 0.44%
lorenzo hernandez garcia-hierro lorenzo hernandez garcia-hierro 20 0.24% 1 0.44%
arnaldo carvalho de melo arnaldo carvalho de melo 18 0.21% 2 0.88%
gao feng gao feng 18 0.21% 5 2.21%
thomas gleixner thomas gleixner 14 0.17% 2 0.88%
pablo neira ayuso pablo neira ayuso 13 0.15% 1 0.44%
dustin kirkland dustin kirkland 12 0.14% 1 0.44%
dan duval dan duval 12 0.14% 1 0.44%
zhang xiliang zhang xiliang 11 0.13% 1 0.44%
mathias krause mathias krause 10 0.12% 2 0.88%
randy dunlap randy dunlap 9 0.11% 1 0.44%
jan blunck jan blunck 9 0.11% 1 0.44%
pavel emelianov pavel emelianov 9 0.11% 1 0.44%
ahmed s. darwish ahmed s. darwish 8 0.09% 2 0.88%
jesper juhl jesper juhl 8 0.09% 1 0.44%
toshiyuki okajima toshiyuki okajima 6 0.07% 1 0.44%
harvey harrison harvey harrison 5 0.06% 1 0.44%
jan engelhardt jan engelhardt 5 0.06% 1 0.44%
johannes berg johannes berg 5 0.06% 1 0.44%
darrel goeddel darrel goeddel 5 0.06% 2 0.88%
americo wang americo wang 5 0.06% 1 0.44%
adrian bunk adrian bunk 4 0.05% 1 0.44%
tyler hicks tyler hicks 4 0.05% 1 0.44%
hong zhi guo hong zhi guo 3 0.04% 1 0.44%
nigel cunningham nigel cunningham 3 0.04% 1 0.44%
stephen hemminger stephen hemminger 3 0.04% 1 0.44%
yaowei bai yaowei bai 3 0.04% 1 0.44%
david howells david howells 3 0.04% 1 0.44%
tejun heo tejun heo 3 0.04% 1 0.44%
ingo molnar ingo molnar 3 0.04% 1 0.44%
dave jones dave jones 2 0.02% 1 0.44%
konstantin khlebnikov konstantin khlebnikov 2 0.02% 1 0.44%
paul davies c paul davies c 2 0.02% 1 0.44%
andrea arcangeli andrea arcangeli 2 0.02% 1 0.44%
denis v. lunev denis v. lunev 2 0.02% 1 0.44%
peng haitao peng haitao 1 0.01% 1 0.44%
neil horman neil horman 1 0.01% 1 0.44%
josh boyer josh boyer 1 0.01% 1 0.44%
peter zijlstra peter zijlstra 1 0.01% 1 0.44%
paul mcquade paul mcquade 1 0.01% 1 0.44%
alexey dobriyan alexey dobriyan 1 0.01% 1 0.44%
mel gorman mel gorman 1 0.01% 1 0.44%
shailendra verma shailendra verma 1 0.01% 1 0.44%
alex copot alex copot 1 0.01% 1 0.44%
arun sharma arun sharma 1 0.01% 1 0.44%
linus torvalds linus torvalds 1 0.01% 1 0.44%
hirofumi ogawa hirofumi ogawa 1 0.01% 1 0.44%
vesa-matti kari vesa-matti kari 1 0.01% 1 0.44%
paul gortmaker paul gortmaker 1 0.01% 1 0.44%
fabian frederick fabian frederick 1 0.01% 1 0.44%
Total 8432 100.00% 226 100.00%
Directory: kernel

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
steve grubb	steve grubb	25	65.79%	1	25.00%
eric paris	eric paris	6	15.79%	1	25.00%
richard guy briggs	richard guy briggs	4	10.53%	1	25.00%
arnaldo carvalho de melo	arnaldo carvalho de melo	3	7.89%	1	25.00%
	Total	38	100.00%	4	100.00%
cregit-Linux how code gets into the kernel

Release 4.10 kernel/audit.c

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