From: Brett Bryant <bbryant@digium.com>
Date: Fri, 13 May 2011 18:09:34 +0000 (+0000)
Subject: Fixes a segmentation fault in dynamic hints when a channel technology isn't
X-Git-Tag: 1.8.5-rc1~11^2~116
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c38148a7d43426cc2ddc871126f98e0e1d84d29;p=thirdparty%2Fasterisk.git

Fixes a segmentation fault in dynamic hints when a channel technology isn't
loaded for a hint.

(closes issue #18495)
Reported by: bertrand
Tested by: bertrand



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@318921 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/main/channel.c b/main/channel.c
index 5025f0cd66..cb1c36e38a 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -3828,7 +3828,7 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio)
 			}
 			/* Clear the exception flag */
 			ast_clear_flag(chan, AST_FLAG_EXCEPTION);
-		} else if (chan->tech->read)
+		} else if (chan->tech && chan->tech->read)
 			f = chan->tech->read(chan);
 		else
 			ast_log(LOG_WARNING, "No read routine on channel %s\n", chan->name);