diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2009-07-03 08:29:20 -0500 |
|---|---|---|
| committer | Clark Williams <williams@redhat.com> | 2012-01-16 13:00:05 -0600 |
| commit | a14ebdfeeb00f0ae16bca90b69fa8b317f962226 (patch) | |
| tree | 890d52e111dd2da529ae721a3691b3771ff841fb | |
| parent | 9d3112c89fb88183079205401c8d21483f0823b7 (diff) | |
posix-timers: Prevent broadcast signals
Posix timers should not send broadcast signals and kernel only
signals. Prevent it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | kernel/posix-timers.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c index 69185ae6b701..7b73c34f000d 100644 --- a/kernel/posix-timers.c +++ b/kernel/posix-timers.c @@ -439,6 +439,7 @@ static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer) static struct pid *good_sigevent(sigevent_t * event) { struct task_struct *rtn = current->group_leader; + int sig = event->sigev_signo; if ((event->sigev_notify & SIGEV_THREAD_ID ) && (!(rtn = find_task_by_vpid(event->sigev_notify_thread_id)) || @@ -447,7 +448,8 @@ static struct pid *good_sigevent(sigevent_t * event) return NULL; if (((event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) && - ((event->sigev_signo <= 0) || (event->sigev_signo > SIGRTMAX))) + (sig <= 0 || sig > SIGRTMAX || sig_kernel_only(sig) || + sig_kernel_coredump(sig))) return NULL; return task_pid(rtn); |