| From d0dc8368b608d766e784c56da37f5fbc6d870f65 Mon Sep 17 00:00:00 2001 |
| From: Thomas Gleixner <tglx@linutronix.de> |
| Date: Fri, 3 Jul 2009 08:29:20 -0500 |
| Subject: [PATCH] posix-timers: Prevent broadcast signals |
| |
| commit f736e04057fae4b720d333255876c9491e9ed14d in tip. |
| |
| Posix timers should not send broadcast signals and kernel only |
| signals. Prevent it. |
| |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| |
| diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c |
| index 4954407..2114ed0 100644 |
| --- a/kernel/posix-timers.c |
| +++ b/kernel/posix-timers.c |
| @@ -462,6 +462,7 @@ 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)) || |
| @@ -470,7 +471,8 @@ 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); |
| -- |
| 1.7.1.1 |
| |
