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authorOleg Nesterov <oleg@tv-sign.ru>2006-02-15 22:50:10 +0300
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-15 11:05:43 -0800
commit5ecfbae093f0c37311e89b29bfc0c9d586eace87 (patch)
treeeabd0a145af64e26c900578c95175ab313828661 /fs
parentdadac81b1b86196fcc48fb87620403c4a7174f06 (diff)
downloadlinux-stericsson-5ecfbae093f0c37311e89b29bfc0c9d586eace87.tar.gz
[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')
-rw-r--r--fs/exec.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 055378d2513e..0e1c95074d42 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);