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wait_task_stopped: Check p->exit_state instead of TASK_TRACED

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The original meaning of the old test (p->state > TASK_STOPPED) was
"not dead", since it was before TASK_TRACED existed and before the
state/exit_state split.  It was a wrong correction in commit
14bf01bb05 to make this test for
TASK_TRACED instead.  It should have been changed when TASK_TRACED
was introducted and again when exit_state was introduced.

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Alexey Dobriyan <adobriyan@sw.ru>
Cc: Kees Cook <kees@ubuntu.com>
Acked-by: Scott James Remnant <scott@ubuntu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Roland McGrath 2007-11-13 22:11:50 -08:00 committed by Linus Torvalds
parent 99fee6d7e5
commit a3474224e6
1 changed files with 1 additions and 2 deletions
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3
kernel/exit.c
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@ -1386,8 +1386,7 @@ static int wait_task_stopped(struct task_struct *p, int delayed_group_leader,
int why = (p->ptrace & PT_PTRACED) ? CLD_TRAPPED : CLD_STOPPED;
exit_code = p->exit_code;
if (unlikely(!exit_code) ||
unlikely(p->state & TASK_TRACED))
if (unlikely(!exit_code) || unlikely(p->exit_state))
goto bail_ref;
return wait_noreap_copyout(p, pid, uid,
why, (exit_code << 8) | 0x7f,