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39 lines
1.2 KiB
Diff
39 lines
1.2 KiB
Diff
From 049f419be39f57dbd0ae2b8f71b282a2c28f7821 Mon Sep 17 00:00:00 2001
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Fri, 3 Jul 2009 08:29:20 -0500
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Subject: [PATCH 128/450] posix-timers: Prevent broadcast signals
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Posix timers should not send broadcast signals and kernel only
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signals. Prevent it.
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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kernel/time/posix-timers.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
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index 55d45fe2cc17..dff86a0157db 100644
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--- a/kernel/time/posix-timers.c
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+++ b/kernel/time/posix-timers.c
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@@ -443,6 +443,7 @@ static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer)
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static struct pid *good_sigevent(sigevent_t * event)
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{
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struct task_struct *rtn = current->group_leader;
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+ int sig = event->sigev_signo;
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switch (event->sigev_notify) {
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case SIGEV_SIGNAL | SIGEV_THREAD_ID:
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@@ -452,7 +453,8 @@ static struct pid *good_sigevent(sigevent_t * event)
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/* FALLTHRU */
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case SIGEV_SIGNAL:
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case SIGEV_THREAD:
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- if (event->sigev_signo <= 0 || event->sigev_signo > SIGRTMAX)
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+ if (sig <= 0 || sig > SIGRTMAX ||
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+ sig_kernel_only(sig) || sig_kernel_coredump(sig))
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return NULL;
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/* FALLTHRU */
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case SIGEV_NONE:
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--
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2.19.2
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