From: Jonathan Rose <jrose@digium.com>
Date: Tue, 5 Aug 2014 13:59:53 +0000 (+0000)
Subject: chan_iax2: Fix a crash that occurs when using allow=all for an IAX2 peer
X-Git-Tag: 13.0.0-beta1~48
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2e350d6bd670b8dc92427706df333ba922368336;p=thirdparty%2Fasterisk.git

chan_iax2: Fix a crash that occurs when using allow=all for an IAX2 peer

Or any combination of codecs that includes Opus.

ASTERISK-24107 #close
Review: https://reviewboard.asterisk.org/r/3885/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@420028 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/main/format.c b/main/format.c
index 83206f28c7..e54fca01b4 100644
--- a/main/format.c
+++ b/main/format.c
@@ -247,7 +247,7 @@ enum ast_format_cmp_res ast_format_cmp(const struct ast_format *format1, const s
 
 	interface = format1->interface ? format1->interface : format2->interface;
 
-	if (interface) {
+	if (interface && interface->format_cmp) {
 		return interface->format_cmp(format1, format2);
 	}