| From: Thomas Gleixner <tglx@linutronix.de> |
| 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 <tglx@linutronix.de> |
| |
| --- |
| 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 |
| @@ -434,6 +434,7 @@ 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; |
| |
| switch (event->sigev_notify) { |
| case SIGEV_SIGNAL | SIGEV_THREAD_ID: |
| @@ -443,7 +444,8 @@ static struct pid *good_sigevent(sigeven |
| /* FALLTHRU */ |
| case SIGEV_SIGNAL: |
| case SIGEV_THREAD: |
| - if (event->sigev_signo <= 0 || event->sigev_signo > SIGRTMAX) |
| + if (sig <= 0 || sig > SIGRTMAX || |
| + sig_kernel_only(sig) || sig_kernel_coredump(sig)) |
| return NULL; |
| /* FALLTHRU */ |
| case SIGEV_NONE: |
