From 35667d75c38af8f7fc523dd47fa0751cb7afadac Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Mon, 24 Mar 2014 21:07:44 +0100
Subject: [PATCH] Fixed undefined variable value with certain code paths.

In sentinelFlushConfig() fd could be undefined when the following if
statement was true:

        if (rewrite_status == -1) goto werr;

This could cause random file descriptors to get closed.
---
 src/sentinel.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/sentinel.c b/src/sentinel.c
index be1591c9..fa312586 100644
--- a/src/sentinel.c
+++ b/src/sentinel.c
@@ -1560,7 +1560,7 @@ void rewriteConfigSentinelOption(struct rewriteConfigState *state) {
  *
  * On failure the function logs a warning on the Redis log. */
 void sentinelFlushConfig(void) {
-    int fd;
+    int fd = -1;
     int saved_hz = server.hz;
     int rewrite_status;
 
@@ -1572,7 +1572,6 @@ void sentinelFlushConfig(void) {
     if ((fd = open(server.configfile,O_RDONLY)) == -1) goto werr;
     if (fsync(fd) == -1) goto werr;
     if (close(fd) == EOF) goto werr;
-
     return;
 
 werr: