fix seg fault when the app is called on an invalid url (bug #4389)

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@5775 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 7 insertions, 5 deletions

diff --git a/apps/app_curl.c b/apps/app_curl.c
index ecc4a2c6b..f81071aa8 100755
--- a/apps/app_curl.c
+++ b/apps/app_curl.c
@@ -115,13 +115,15 @@ static int curl_exec(struct ast_channel *chan, void *data)
 		curl_easy_perform(curl);
 		curl_easy_cleanup(curl);
 
-		chunk.memory[chunk.size] = '\0';
-		if (chunk.memory[chunk.size - 1] == 10)
-			chunk.memory[chunk.size - 1] = '\0';
+		if (chunk.memory) {
+			chunk.memory[chunk.size] = '\0';
+			if (chunk.memory[chunk.size - 1] == 10)
+				chunk.memory[chunk.size - 1] = '\0';
 
-		pbx_builtin_setvar_helper(chan, "CURL", chunk.memory);
+			pbx_builtin_setvar_helper(chan, "CURL", chunk.memory);
 
-		free(chunk.memory);
+			free(chunk.memory);
+		}
 	} else {
 		ast_log(LOG_ERROR, "Cannot allocate curl structure\n");
 		res = -1;