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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>
This commit is contained in:
Thomas Gleixner 2009-07-03 08:29:20 -05:00 committed by Alibek Omarov
parent 045470f9f7
commit ac24698eb1
1 changed files with 3 additions and 1 deletions
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4
kernel/posix-timers.c
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@ -497,6 +497,7 @@ 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)) ||
@ -505,7 +506,8 @@ 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);