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From acadd95e10777dd0a5c12367736bceae2788e67a 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>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---
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 00d1fda..711737b 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);
--
1.7.0.4
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