From: Terry Wilson <twilson@digium.com>
Date: Thu, 8 Dec 2011 16:17:46 +0000 (+0000)
Subject: Don't crash on INFO automon request with no channel
X-Git-Tag: 1.6.2.21~6^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d5acfbf3ff5b418c5b698fbeb675073a43b0ebac;p=thirdparty%2Fasterisk.git

Don't crash on INFO automon request with no channel

AST-2011-014. When automon was enabled in features.conf, it was possible
to crash Asterisk by sending an INFO request if no channel had been
created yet.

(closes issue ASTERISK-18805)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@347530 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 310a69e655..243efe5120 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -17417,11 +17417,18 @@ static void handle_request_info(struct sip_pvt *p, struct sip_request *req)
 			per device. I don't want incoming callers to record calls in my
 			pbx.
 		*/
-		/* first, get the feature string, if it exists */
+		
 		struct ast_call_feature *feat;
 		int j;
 		struct ast_frame f = { AST_FRAME_DTMF, };
 
+		if (!p->owner) {        /* not a PBX call */
+			transmit_response(p, "481 Call leg/transaction does not exist", req);
+			sip_scheddestroy(p, DEFAULT_TRANS_TIMEOUT);
+			return;
+		}
+
+		/* first, get the feature string, if it exists */
 		ast_rdlock_call_features();
 		feat = ast_find_call_feature("automon");
 		if (!feat || ast_strlen_zero(feat->exten)) {