[asterisk-commits] kmoore: branch 1.8 r345063 - /branches/1.8/channels/chan_sip.c

[SVN commits to the Asterisk project]

Author: kmoore
Date: Mon Nov 14 09:08:12 2011
New Revision: 345063

URL: http://svnview.digium.com/svn/asterisk?view=rev&rev=345063
Log:
Ensure that a null vmexten does not cause a segfault

When sip_send_mwi_to_peer was modified recently to avoid deadlocks, vmexten
was not expected to be null.  This change handles that situation to avoid
a segfault.

Modified:
    branches/1.8/channels/chan_sip.c

Modified: branches/1.8/channels/chan_sip.c
URL: http://svnview.digium.com/svn/asterisk/branches/1.8/channels/chan_sip.c?view=diff&rev=345063&r1=345062&r2=345063
==============================================================================
--- branches/1.8/channels/chan_sip.c (original)
+++ branches/1.8/channels/chan_sip.c Mon Nov 14 09:08:12 2011
@@ -25280,11 +25280,13 @@
 	/* Called with peerl lock, but releases it */
 	struct sip_pvt *p;
 	int newmsgs = 0, oldmsgs = 0;
-	const char *vmexten;
+	const char *vmexten = NULL;
 
 	ao2_lock(peer);
 
-	vmexten = ast_strdupa(peer->vmexten);
+	if (peer->vmexten) {
+		vmexten = ast_strdupa(peer->vmexten);
+	}
 
 	if (ast_test_flag((&peer->flags[1]), SIP_PAGE2_SUBSCRIBEMWIONLY) && !peer->mwipvt) {
 		ao2_unlock(peer);