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coredump: make __get_dumpable/get_dumpable inline, kill fs/coredump.h

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1. Remove fs/coredump.h. It is not clear why do we need it,
   it only declares __get_dumpable(), signal.c includes it
   for no reason.

2. Now that get_dumpable() and __get_dumpable() are really
   trivial make them inline in linux/sched.h.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Alex Kelly <alex.page.kelly@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Petr Matousek <pmatouse@redhat.com>
Cc: Vasily Kulikov <segoon@openwall.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2014-01-23 15:55:34 -08:00 committed by Linus Torvalds
parent 7288e1187b
commit 942be3875a
4 changed files with 17 additions and 29 deletions
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1
fs/coredump.c
View File

@ -40,7 +40,6 @@
#include <trace/events/task.h>
#include "internal.h"
#include "coredump.h"
#include <trace/events/sched.h>

6
fs/coredump.h
View File

@ -1,6 +0,0 @@
#ifndef _FS_COREDUMP_H
#define _FS_COREDUMP_H
extern int __get_dumpable(unsigned long mm_flags);
#endif

18
fs/exec.c
View File

@ -62,7 +62,6 @@
#include <trace/events/task.h>
#include "internal.h"
#include "coredump.h"
#include <trace/events/sched.h>
@ -1609,7 +1608,6 @@ void set_binfmt(struct linux_binfmt *new)
if (new)
__module_get(new->module);
}
EXPORT_SYMBOL(set_binfmt);
/*
@ -1628,22 +1626,6 @@ void set_dumpable(struct mm_struct *mm, int value)
} while (cmpxchg(&mm->flags, old, new) != old);
}
int __get_dumpable(unsigned long mm_flags)
{
return mm_flags & MMF_DUMPABLE_MASK;
}
/*
* This returns the actual value of the suid_dumpable flag. For things
* that are using this for checking for privilege transitions, it must
* test against SUID_DUMP_USER rather than treating it as a boolean
* value.
*/
int get_dumpable(struct mm_struct *mm)
{
return __get_dumpable(mm->flags);
}
SYSCALL_DEFINE3(execve,
const char __user *, filename,
const char __user *const __user *, argv,

21
include/linux/sched.h
View File

@ -391,10 +391,6 @@ arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
static inline void arch_pick_mmap_layout(struct mm_struct *mm) {}
#endif
extern void set_dumpable(struct mm_struct *mm, int value);
extern int get_dumpable(struct mm_struct *mm);
#define SUID_DUMP_DISABLE 0 /* No setuid dumping */
#define SUID_DUMP_USER 1 /* Dump as user of process */
#define SUID_DUMP_ROOT 2 /* Dump as root */
@ -405,6 +401,23 @@ extern int get_dumpable(struct mm_struct *mm);
#define MMF_DUMPABLE_BITS 2
#define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1)
extern void set_dumpable(struct mm_struct *mm, int value);
/*
* This returns the actual value of the suid_dumpable flag. For things
* that are using this for checking for privilege transitions, it must
* test against SUID_DUMP_USER rather than treating it as a boolean
* value.
*/
static inline int __get_dumpable(unsigned long mm_flags)
{
return mm_flags & MMF_DUMPABLE_MASK;
}
static inline int get_dumpable(struct mm_struct *mm)
{
return __get_dumpable(mm->flags);
}
/* coredump filter bits */
#define MMF_DUMP_ANON_PRIVATE 2
#define MMF_DUMP_ANON_SHARED 3