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exit: reparent: fix the dead-parent PR_SET_CHILD_SUBREAPER reparenting 

The ->has_child_subreaper code in find_new_reaper() finds alive "thread"
but returns another "reaper" thread which can be dead.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Kay Sievers <kay@vrfy.org>
Cc: Lennart Poettering <lennart@poettering.net>
Cc: Sterling Alexander <stalexan@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 2014-12-10 15:54:59 -08:00 committed by Linus Torvalds
parent c35a7f18a0
commit 8a1296aea4
1 changed files with 1 additions and 1 deletions
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kernel/exit.c
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@ -512,7 +512,7 @@ static struct task_struct *find_new_reaper(struct task_struct *father)
thread = reaper; thread = reaper;
do { do {
if (!(thread->flags & PF_EXITING)) if (!(thread->flags & PF_EXITING))
return reaper; return thread;
} while_each_thread(reaper, thread); } while_each_thread(reaper, thread);
} }
} }