35 lines
1.1 KiB
Diff
35 lines
1.1 KiB
Diff
From: Thomas Gleixner <tglx@linutronix.de>
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Date: Fri, 3 Jul 2009 08:29:20 -0500
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Subject: posix-timers: Prevent broadcast signals
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.14/older/patches-4.14.8-rt9.tar.xz
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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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--- a/kernel/time/posix-timers.c
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+++ b/kernel/time/posix-timers.c
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@@ -433,6 +433,7 @@ static enum hrtimer_restart posix_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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@@ -442,7 +443,8 @@ static struct pid *good_sigevent(sigeven
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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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