format_cap.c: Fix CLI "core show channeltype Surrogate" crash.

* Make ast_format_cap_get_names() NULL tolerant. ASTERISK-26331 #close Reported by: CGI.NET Change-Id: Id67e93936dc8ec2a33a9d33655843d43b59285a3
10 years ago · 8d1c535bd6
parent 1bd571ef75
commit 8d1c535bd6
1 changed files with 1 additions and 1 deletions
--- a/main/format_cap.c
+++ b/main/format_cap.c
@ -737,7 +737,7 @@ const char *ast_format_cap_get_names(struct ast_format_cap *cap, struct ast_str

 	ast_str_set(buf, 0, "(");

-	if (!AST_VECTOR_SIZE(&cap->preference_order)) {
+	if (!cap || !AST_VECTOR_SIZE(&cap->preference_order)) {
 		ast_str_append(buf, 0, "nothing)");
 		return ast_str_buffer(*buf);
 	}