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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2006-02-15 22:50:10 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-15 11:05:43 -0800 |
| commit | 5ecfbae093f0c37311e89b29bfc0c9d586eace87 (patch) | |
| tree | eabd0a145af64e26c900578c95175ab313828661 /fs/exec.c | |
| parent | dadac81b1b86196fcc48fb87620403c4a7174f06 (diff) | |
| download | linux-3.10-5ecfbae093f0c37311e89b29bfc0c9d586eace87.tar.gz linux-3.10-5ecfbae093f0c37311e89b29bfc0c9d586eace87.tar.bz2 linux-3.10-5ecfbae093f0c37311e89b29bfc0c9d586eace87.zip | |
[PATCH] fix zap_thread's ptrace related problems
1. The tracee can go from ptrace_stop() to do_signal_stop()
after __ptrace_unlink(p).
2. It is unsafe to __ptrace_unlink(p) while p->parent may wait
for tasklist_lock in ptrace_detach().
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/exec.c')
| -rw-r--r-- | fs/exec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/exec.c b/fs/exec.c index 055378d2513..0e1c95074d4 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1403,7 +1403,7 @@ static void zap_threads (struct mm_struct *mm) do_each_thread(g,p) { if (mm == p->mm && p != tsk && p->ptrace && p->parent->mm == mm) { - __ptrace_unlink(p); + __ptrace_detach(p, 0); } } while_each_thread(g,p); write_unlock_irq(&tasklist_lock); |