PWN-Hunter/android_kernel_xiaomi_sdm845
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coredump: make mm->core_state visible to ->core_dump()

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Move the "struct core_state core_state" from coredump_wait() to
do_coredump(), this makes mm->core_state visible to binfmt->core_dump().

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Roland McGrath <roland@redhat.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 2008-07-25 01:47:43 -07:00 committed by Linus Torvalds
parent c5f1cc8c18
commit 9d5b327bf1
1 changed files with 7 additions and 7 deletions
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14
fs/exec.c
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@ -1595,17 +1595,16 @@ static inline int zap_threads(struct task_struct *tsk, struct mm_struct *mm,
return nr;
}
static int coredump_wait(int exit_code)
static int coredump_wait(int exit_code, struct core_state *core_state)
{
struct task_struct *tsk = current;
struct mm_struct *mm = tsk->mm;
struct core_state core_state;
struct completion *vfork_done;
int core_waiters;
init_completion(&mm->core_done);
init_completion(&core_state.startup);
core_waiters = zap_threads(tsk, mm, &core_state, exit_code);
init_completion(&core_state->startup);
core_waiters = zap_threads(tsk, mm, core_state, exit_code);
up_write(&mm->mmap_sem);
if (unlikely(core_waiters < 0))
@ -1622,8 +1621,7 @@ static int coredump_wait(int exit_code)
}
if (core_waiters)
wait_for_completion(&core_state.startup);
mm->core_state = NULL;
wait_for_completion(&core_state->startup);
fail:
return core_waiters;
}
@ -1679,6 +1677,7 @@ int get_dumpable(struct mm_struct *mm)
int do_coredump(long signr, int exit_code, struct pt_regs * regs)
{
struct core_state core_state;
char corename[CORENAME_MAX_SIZE + 1];
struct mm_struct *mm = current->mm;
struct linux_binfmt * binfmt;
@ -1717,7 +1716,7 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
current->fsuid = 0; /* Dump root private */
}
retval = coredump_wait(exit_code);
retval = coredump_wait(exit_code, &core_state);
if (retval < 0)
goto fail;
@ -1812,6 +1811,7 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
current->fsuid = fsuid;
complete_all(&mm->core_done);
mm->core_state = NULL;
fail:
return retval;
}