Release 4.17 include/linux/binfmts.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_BINFMTS_H
#define _LINUX_BINFMTS_H
#include <linux/sched.h>
#include <linux/unistd.h>
#include <asm/exec.h>
#include <uapi/linux/binfmts.h>
struct filename;
#define CORENAME_MAX_SIZE 128
/*
* This structure is used to hold the arguments that are used when loading binaries.
*/
struct linux_binprm {
char buf[BINPRM_BUF_SIZE];
#ifdef CONFIG_MMU
struct vm_area_struct *vma;
unsigned long vma_pages;
#else
# define MAX_ARG_PAGES 32
struct page *page[MAX_ARG_PAGES];
#endif
struct mm_struct *mm;
unsigned long p; /* current top of mem */
unsigned int
/*
* True after the bprm_set_creds hook has been called once
* (multiple calls can be made via prepare_binprm() for
* binfmt_script/misc).
*/
called_set_creds:1,
/*
* True if most recent call to the commoncaps bprm_set_creds
* hook (due to multiple prepare_binprm() calls from the
* binfmt_script/misc handlers) resulted in elevated
* privileges.
*/
cap_elevated:1,
/*
* Set by bprm_set_creds hook to indicate a privilege-gaining
* exec has happened. Used to sanitize execution environment
* and to set AT_SECURE auxv for glibc.
*/
secureexec:1;
#ifdef __alpha__
unsigned int taso:1;
#endif
unsigned int recursion_depth; /* only for search_binary_handler() */
struct file * file;
struct cred *cred; /* new credentials */
int unsafe; /* how unsafe this exec is (mask of LSM_UNSAFE_*) */
unsigned int per_clear; /* bits to clear in current->personality */
int argc, envc;
const char * filename; /* Name of binary as seen by procps */
const char * interp; /* Name of the binary really executed. Most
of the time same as filename, but could be
different for binfmt_{misc,script} */
unsigned interp_flags;
unsigned interp_data;
unsigned long loader, exec;
struct rlimit rlim_stack; /* Saved RLIMIT_STACK used during exec. */
} __randomize_layout;
#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
/* fd of the binary should be passed to the interpreter */
#define BINPRM_FLAGS_EXECFD_BIT 1
#define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
/* filename of the binary will be inaccessible after exec */
#define BINPRM_FLAGS_PATH_INACCESSIBLE_BIT 2
#define BINPRM_FLAGS_PATH_INACCESSIBLE (1 << BINPRM_FLAGS_PATH_INACCESSIBLE_BIT)
/* Function parameter for binfmt->coredump */
struct coredump_params {
const siginfo_t *siginfo;
struct pt_regs *regs;
struct file *file;
unsigned long limit;
unsigned long mm_flags;
loff_t written;
loff_t pos;
};
/*
* This structure defines the functions that are used to load the binary formats that
* linux accepts.
*/
struct linux_binfmt {
struct list_head lh;
struct module *module;
int (*load_binary)(struct linux_binprm *);
int (*load_shlib)(struct file *);
int (*core_dump)(struct coredump_params *cprm);
unsigned long min_coredump; /* minimal dump size */
} __randomize_layout;
extern void __register_binfmt(struct linux_binfmt *fmt, int insert);
/* Registration of default binfmt handlers */
static inline void register_binfmt(struct linux_binfmt *fmt)
{
__register_binfmt(fmt, 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ivan Kokshaysky | 17 | 89.47% | 1 | 50.00% |
| Al Viro | 2 | 10.53% | 1 | 50.00% |
| Total | 19 | 100.00% | 2 | 100.00% |
/* Same as above, but adds a new binfmt at the top of the list */
static inline void insert_binfmt(struct linux_binfmt *fmt)
{
__register_binfmt(fmt, 1);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ivan Kokshaysky | 17 | 89.47% | 1 | 50.00% |
| Al Viro | 2 | 10.53% | 1 | 50.00% |
| Total | 19 | 100.00% | 2 | 100.00% |
extern void unregister_binfmt(struct linux_binfmt *);
extern int prepare_binprm(struct linux_binprm *);
extern int __must_check remove_arg_zero(struct linux_binprm *);
extern int search_binary_handler(struct linux_binprm *);
extern int flush_old_exec(struct linux_binprm * bprm);
extern void setup_new_exec(struct linux_binprm * bprm);
extern void finalize_exec(struct linux_binprm *bprm);
extern void would_dump(struct linux_binprm *, struct file *);
extern int suid_dumpable;
/* Stack area protections */
#define EXSTACK_DEFAULT 0
/* Whatever the arch defaults to */
#define EXSTACK_DISABLE_X 1
/* Disable executable stacks */
#define EXSTACK_ENABLE_X 2
/* Enable executable stacks */
extern int setup_arg_pages(struct linux_binprm * bprm,
unsigned long stack_top,
int executable_stack);
extern int transfer_args_to_stack(struct linux_binprm *bprm,
unsigned long *sp_location);
extern int bprm_change_interp(const char *interp, struct linux_binprm *bprm);
extern int copy_strings_kernel(int argc, const char *const *argv,
struct linux_binprm *bprm);
extern int prepare_bprm_creds(struct linux_binprm *bprm);
extern void install_exec_creds(struct linux_binprm *bprm);
extern void set_binfmt(struct linux_binfmt *new);
extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t);
extern int do_execve(struct filename *,
const char __user * const __user *,
const char __user * const __user *);
extern int do_execveat(int, struct filename *,
const char __user * const __user *,
const char __user * const __user *,
int);
#endif /* _LINUX_BINFMTS_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 204 | 33.83% | 18 | 26.47% |
| Ingo Molnar | 57 | 9.45% | 1 | 1.47% |
| Kees Cook | 43 | 7.13% | 7 | 10.29% |
| Al Viro | 42 | 6.97% | 8 | 11.76% |
| Ivan Kokshaysky | 41 | 6.80% | 1 | 1.47% |
| David Howells | 29 | 4.81% | 4 | 5.88% |
| Masami Hiramatsu | 27 | 4.48% | 2 | 2.94% |
| Andrew Morton | 25 | 4.15% | 2 | 2.94% |
| Yoav Zach | 23 | 3.81% | 2 | 2.94% |
| Ollie Wild | 18 | 2.99% | 1 | 1.47% |
| Oleg Nesterov | 17 | 2.82% | 5 | 7.35% |
| Kirill A. Shutemov | 15 | 2.49% | 2 | 2.94% |
| Linus Torvalds | 15 | 2.49% | 2 | 2.94% |
| Nico Pitre | 15 | 2.49% | 1 | 1.47% |
| David Drysdale | 9 | 1.49% | 1 | 1.47% |
| Alan Cox | 4 | 0.66% | 1 | 1.47% |
| Dan Aloni | 4 | 0.66% | 1 | 1.47% |
| Mateusz Guzik | 3 | 0.50% | 1 | 1.47% |
| Alexey Dobriyan | 3 | 0.50% | 2 | 2.94% |
| Denys Vlasenko | 3 | 0.50% | 1 | 1.47% |
| Greg Kroah-Hartman | 2 | 0.33% | 2 | 2.94% |
| Hiroshi Shimamoto | 2 | 0.33% | 1 | 1.47% |
| Pavel Emelyanov | 1 | 0.17% | 1 | 1.47% |
| Serge E. Hallyn | 1 | 0.17% | 1 | 1.47% |
| Total | 603 | 100.00% | 68 | 100.00% |
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