From: Sean Bright <sean.bright@gmail.com>
Date: Wed, 5 Jul 2017 12:42:07 +0000 (-0400)
Subject: core: Fix segfault when invoking 'data get' CLI command
X-Git-Tag: 14.6.0-rc1~2^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ebacfc861816a826e3752e7667a1c14b0f2b815a;p=thirdparty%2Fasterisk.git

core: Fix segfault when invoking 'data get' CLI command

Invoking 'data get /asterisk/core/channeltypes' caused a crash because
of an assumption of a tech's capabilities to be non-NULL. The
'Surrogate' tech, however, does have a NULL capabilities member,
resulting in a crash.

ASTERISK-27108 #close

Change-Id: I2fbe7715681f43d5565d1e1599269468c26b0e0a
---

diff --git a/main/data.c b/main/data.c
index 1aaae18f18..a65d0b8e01 100644
--- a/main/data.c
+++ b/main/data.c
@@ -3145,6 +3145,10 @@ int ast_data_add_codecs(struct ast_data *root, const char *node_name, struct ast
 		return -1;
 	}
 
+	if (!cap) {
+		return 0;
+	}
+
 	count = ast_format_cap_count(cap);
 	for (i = 0; i < count; ++i) {
 		struct ast_format *fmt;