From: Matthew Jordan <mjordan@digium.com>
Date: Mon, 23 Apr 2012 14:07:29 +0000 (+0000)
Subject: AST-2012-006: Fix crash in UPDATE handling when no channel owner exists
X-Git-Tag: 10.5.0-rc1~38
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=75cbeb35c34b04122b65b73e8242ef3cc31d2d00;p=thirdparty%2Fasterisk.git

AST-2012-006: Fix crash in UPDATE handling when no channel owner exists

If Asterisk receives a SIP UPDATE request after a call has been terminated and
the channel has been destroyed but before the SIP dialog has been destroyed, a
condition exists where a connected line update would be attempted on a
non-existing channel.  This would cause Asterisk to crash.  The patch resolves
this by first ensuring that the SIP dialog has an owning channel before
attempting a connected line update.  If an UPDATE request is received and no
channel is associated with the dialog, a 481 response is sent.

(closes issue ASTERISK-19770)
Reported by: Thomas Arimont
Tested by: Matt Jordan
Patches:
  ASTERISK-19278-2012-04-16.diff uploaded by Matt Jordan (license 6283)
........

Merged revisions 363106 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/10@363107 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 28fb125ed0..a5a59773e2 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -22818,6 +22818,10 @@ static int handle_request_update(struct sip_pvt *p, struct sip_request *req)
 		transmit_response(p, "501 Method Not Implemented", req);
 		return 0;
 	}
+	if (!p->owner) {
+		transmit_response(p, "481 Call/Transaction Does Not Exist", req);
+		return 0;
+	}
 	if (get_rpid(p, req)) {
 		struct ast_party_connected_line connected;
 		struct ast_set_party_connected_line update_connected;