From: Jasper van der Neut <jasper@isotopic.nl>
Date: Wed, 23 Sep 2020 09:05:39 +0000 (+0200)
Subject: channels: Don't dereference NULL pointer
X-Git-Tag: 17.9.0-rc1~18
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=47deb6967aa3e2a300460036f6f1ed54c1e807aa;p=thirdparty%2Fasterisk.git

channels: Don't dereference NULL pointer

Check result of ast_translator_build_path against NULL before dereferencing.

ASTERISK-29091

Change-Id: Ia3538ea190bd371f70c9dd49984b021765691b29
---

diff --git a/main/channel.c b/main/channel.c
index 0470ddcedb..f873807ca4 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -5686,11 +5686,15 @@ static int set_format(struct ast_channel *chan, struct ast_format_cap *cap_set,
 		if (!direction) {
 			/* reading */
 			trans_pvt = ast_translator_build_path(best_set_fmt, best_native_fmt);
-			trans_pvt->interleaved_stereo = 0;
+			if (trans_pvt) {
+				trans_pvt->interleaved_stereo = 0;
+			}
 		} else {
 			/* writing */
 			trans_pvt = ast_translator_build_path(best_native_fmt, best_set_fmt);
-			trans_pvt->interleaved_stereo = interleaved_stereo;
+			if (trans_pvt) {
+				trans_pvt->interleaved_stereo = interleaved_stereo;
+			}
 		}
 		access->set_trans(chan, trans_pvt);
 		res = trans_pvt ? 0 : -1;