net/asterisk/patches/180-chan_iax2.c-Avoid-crash-with-IAX2-switch-support.patch

   1 From 39912b91384b4a6a4b4b34cdd338970c184fb096 Mon Sep 17 00:00:00 2001
   2 From: Sean Bright <sean@seanbright.com>
   3 Date: Fri, 7 Jul 2023 15:57:39 -0400
   4 Subject: [PATCH] chan_iax2.c: Avoid crash with IAX2 switch support.
   5
   6 A change made in 82cebaa0 did not properly handle the case when a
   7 channel was not provided, triggering a crash. ast_check_hangup(...)
   8 does not protect against NULL pointers.
   9
  10 Fixes #180
  11 ---
  12  channels/chan_iax2.c | 2 +-
  13  1 file changed, 1 insertion(+), 1 deletion(-)
  14
  15 --- a/channels/chan_iax2.c
  16 +++ b/channels/chan_iax2.c
  17 @@ -14312,7 +14312,7 @@ static struct iax2_dpcache *find_cache(s
  18                         ast_log(LOG_WARNING, "Timeout waiting for %s exten %s\n", data, exten);
  19                 }
  20
  21 -               if (ast_check_hangup(chan)) {
  22 +               if (chan && ast_check_hangup(chan)) {
  23                         doabort = 1;
  24                 }
  25