From: Travis Cross <tc@traviscross.com>
Date: Thu, 29 May 2014 14:10:44 +0000 (+0000)
Subject: Fix potential dereference of null pointer
X-Git-Tag: v1.4.5~2^2~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e66d24622ace62fec5fef2a4b22c74ed92baeaa4;p=thirdparty%2Ffreeswitch.git

Fix potential dereference of null pointer

The node could conceivably disappear before we grab the globals mutex
and we'd get back a null pointer.
---

diff --git a/src/mod/applications/mod_fifo/mod_fifo.c b/src/mod/applications/mod_fifo/mod_fifo.c
index 1d48e6f0a3..ce980ae2c0 100644
--- a/src/mod/applications/mod_fifo/mod_fifo.c
+++ b/src/mod/applications/mod_fifo/mod_fifo.c
@@ -1791,7 +1791,7 @@ static void *SWITCH_THREAD_FUNC outbound_enterprise_thread_run(switch_thread_t *
 
 	switch_mutex_lock(globals.mutex);
 	node = switch_core_hash_find(globals.fifo_hash, h->node_name);
-	switch_thread_rwlock_rdlock(node->rwlock);
+	if (node) switch_thread_rwlock_rdlock(node->rwlock);
 	switch_mutex_unlock(globals.mutex);
 
 	if (node) {