From 8888df3a23e6c4e53a90923f061f9f8c2f0de4b5 Mon Sep 17 00:00:00 2001
From: Mark Murawki <markm@intellasoft.net>
Date: Mon, 18 Jul 2011 12:58:02 +0000
Subject: [PATCH] Merged revisions 328611 via svnmerge from
 https://origsvn.digium.com/svn/asterisk/branches/1.10

................
  r328611 | markm | 2011-07-18 08:56:49 -0400 (Mon, 18 Jul 2011) | 15 lines

  Merged revisions 328608 via svnmerge from
  https://origsvn.digium.com/svn/asterisk/branches/1.8

  ........
    r328608 | markm | 2011-07-18 08:35:57 -0400 (Mon, 18 Jul 2011) | 9 lines

    If the sip private structure is null, sip_setoption() will defref the null pointer and crash.

    Ideally, sip_setoption shouldn't be called if there is a lack of a sip private structure.  But this will fix a crash.

    (closes issue ASTERISK-17909)
    Reported by: Mark Murawski
    Tested by: Mark Murawski
  ........
................


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@328612 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 channels/chan_sip.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 603d869537..74d328694e 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -4266,6 +4266,11 @@ static int sip_setoption(struct ast_channel *chan, int option, void *data, int d
 	int res = -1;
 	struct sip_pvt *p = chan->tech_pvt;
 
+        if (!p) {
+        	ast_log(LOG_ERROR, "Attempt to Ref a null pointer.  sip private structure is gone!\n");
+        	return -1;
+        }
+
 	sip_pvt_lock(p);
 
 	switch (option) {