make sure malloc was successful before doing memset (bug #2704)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/v1-0@4087 65c4cc65-6c06-0410-ace0-fbb531ad65f3
21 years ago · f7098a28be
parent fdffdc9364
commit f7098a28be
1 changed files with 1 additions and 1 deletions
--- a/channels/chan_modem.c
+++ b/channels/chan_modem.c
@ -707,8 +707,8 @@ static struct ast_modem_pvt *mkif(char *iface)
 #endif
 	
 	tmp = malloc(sizeof(struct ast_modem_pvt));
-	memset(tmp, 0, sizeof(struct ast_modem_pvt));
 	if (tmp) {
+		memset(tmp, 0, sizeof(struct ast_modem_pvt));
 		tmp->fd = open(iface, O_RDWR | O_NONBLOCK);
 		if (tmp->fd < 0) {
 			ast_log(LOG_WARNING, "Unable to open '%s'\n", iface);