From: Thomas Gleixner Date: Fri, 3 Jul 2009 08:29:20 -0500 Subject: posix-timers: Prevent broadcast signals Posix timers should not send broadcast signals and kernel only signals. Prevent it. Signed-off-by: Thomas Gleixner --- kernel/time/posix-timers.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -507,6 +507,7 @@ static enum hrtimer_restart posix_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)) || @@ -515,7 +516,8 @@ static struct pid *good_sigevent(sigeven 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);