From: Joshua C. Colp <jcolp@sangoma.com>
Date: Wed, 9 Aug 2023 10:57:33 +0000 (-0300)
Subject: manager: Tolerate stasis messages with no channel snapshot.
X-Git-Tag: 18.20.0-rc1~23
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9ef84b80768c41252836a643e0d285f786a837d6;p=thirdparty%2Fasterisk.git

manager: Tolerate stasis messages with no channel snapshot.

In some cases I have yet to determine some stasis messages may
be created without a channel snapshot. This change adds some
tolerance to this scenario, preventing a crash from occurring.

(cherry picked from commit 9b607747ce3064a0229bcfcd45721c5e95784f95)
---

diff --git a/main/manager_channels.c b/main/manager_channels.c
index 8af3465a29..344a2487a7 100644
--- a/main/manager_channels.c
+++ b/main/manager_channels.c
@@ -493,7 +493,7 @@ struct ast_str *ast_manager_build_channel_state_string_prefix(
 	char *connected_name;
 	int res;
 
-	if (snapshot->base->tech_properties & AST_CHAN_TP_INTERNAL) {
+	if (!snapshot || (snapshot->base->tech_properties & AST_CHAN_TP_INTERNAL)) {
 		return NULL;
 	}