From 7a0c5fdf12d9cd035e41734f518aa4568dc48c9d Mon Sep 17 00:00:00 2001
From: Matt Stancliff <matt@genges.com>
Date: Thu, 22 May 2014 15:34:02 -0400
Subject: [PATCH] Disable recursive watchdog signal handler

If we are in the signal handler, we don't want to handle
the signal again.  In extreme cases, this can cause a stack overflow
and segfault Redis.

Fixes #1771
---
 src/debug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/debug.c b/src/debug.c
index 3fb491cb..c7e05830 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -947,7 +947,7 @@ void enableWatchdog(int period) {
         /* Watchdog was actually disabled, so we have to setup the signal
          * handler. */
         sigemptyset(&act.sa_mask);
-        act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_SIGINFO;
+        act.sa_flags = SA_ONSTACK | SA_SIGINFO;
         act.sa_sigaction = watchdogSignalHandler;
         sigaction(SIGALRM, &act, NULL);
     }