diff options
| author | davidxu <davidxu@FreeBSD.org> | 2006-10-24 12:04:21 +0000 |
|---|---|---|
| committer | davidxu <davidxu@FreeBSD.org> | 2006-10-24 12:04:21 +0000 |
| commit | c117e9447c4066c73b48a4ac1aa483480755a667 (patch) | |
| tree | 26c604ab27a3adc80d941c80970fcdebb356e923 | |
| parent | 3334f92e7fb66b791442272638c461226810a58c (diff) | |
| download | FreeBSD-src-c117e9447c4066c73b48a4ac1aa483480755a667.zip FreeBSD-src-c117e9447c4066c73b48a4ac1aa483480755a667.tar.gz | |
Protect sigqueue_take() call by child process's lock, it fixed a
potential race with ptrace 'attach' which changes parent of the
child process.
| -rw-r--r-- | sys/kern/kern_exit.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/kern/kern_exit.c b/sys/kern/kern_exit.c index 1e57aae..6ed8f4c 100644 --- a/sys/kern/kern_exit.c +++ b/sys/kern/kern_exit.c @@ -843,11 +843,11 @@ loop: td->td_retval[0] = p->p_pid; if (status) *status = W_STOPCODE(p->p_xstat); - PROC_UNLOCK(p); PROC_LOCK(q); sigqueue_take(p->p_ksi); PROC_UNLOCK(q); + PROC_UNLOCK(p); return (0); } @@ -856,11 +856,11 @@ loop: sx_xunlock(&proctree_lock); td->td_retval[0] = p->p_pid; p->p_flag &= ~P_CONTINUED; - PROC_UNLOCK(p); PROC_LOCK(q); sigqueue_take(p->p_ksi); PROC_UNLOCK(q); + PROC_UNLOCK(p); if (status) *status = SIGCONT; |
