From: Mark Michelson <mmichelson@digium.com>
Date: Mon, 18 Feb 2008 16:40:36 +0000 (+0000)
Subject: Merged revisions 103770 via svnmerge from
X-Git-Tag: 1.6.0-beta3~2^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e9d0cda77d4b0ecdb1d954c24cdde6161638fbaf;p=thirdparty%2Fasterisk.git

Merged revisions 103770 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r103770 | mmichelson | 2008-02-18 10:37:31 -0600 (Mon, 18 Feb 2008) | 10 lines

Fix a linked list corruption that under the right circumstances
could lead to a looped list, meaning it will traverse forever.

(closes issue #11818)
Reported by: michael-fig
Patches:
      11818.patch uploaded by putnopvut (license 60)
	  Tested by: michael-fig


........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@103771 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/channels/chan_zap.c b/channels/chan_zap.c
index d7676b3598..f5ea1ff341 100644
--- a/channels/chan_zap.c
+++ b/channels/chan_zap.c
@@ -8678,7 +8678,10 @@ static struct zt_pvt *chandup(struct zt_pvt *src)
 	}
 	p->destroy = 1;
 	p->next = iflist;
+	p->prev = NULL;
 	iflist = p;
+	if (iflist->next)
+		iflist->next->prev = p;
 	return p;
 }