39 lines
1.3 KiB
Diff
39 lines
1.3 KiB
Diff
From 224b94ef7444a37fa715a10779f3a758722c7598 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 033/267] 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/posix-timers.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
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index 69185ae..7b73c34 100644
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--- a/kernel/posix-timers.c
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+++ b/kernel/posix-timers.c
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@@ -439,6 +439,7 @@ 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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if ((event->sigev_notify & SIGEV_THREAD_ID ) &&
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(!(rtn = find_task_by_vpid(event->sigev_notify_thread_id)) ||
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@@ -447,7 +448,8 @@ static struct pid *good_sigevent(sigevent_t * event)
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return NULL;
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if (((event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) &&
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- ((event->sigev_signo <= 0) || (event->sigev_signo > SIGRTMAX)))
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+ (sig <= 0 || sig > SIGRTMAX || sig_kernel_only(sig) ||
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+ sig_kernel_coredump(sig)))
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return NULL;
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return task_pid(rtn);
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--
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1.7.10
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