From a9d11d04985ad2d990abebf208ece440afe10b29 Mon Sep 17 00:00:00 2001 From: Joachim Nilsson Date: Fri, 10 Jul 2015 19:27:02 +0200 Subject: [PATCH] ifconfig.c: Fix possible NULL pointer deref. Signed-off-by: Joachim Nilsson --- ifconfig.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/ifconfig.c b/ifconfig.c index 7a97b23..d6f3753 100644 --- a/ifconfig.c +++ b/ifconfig.c @@ -63,7 +63,7 @@ int ifconfig(char *ifname, char *addr, char *mask, int up) } /* Non-zero IP address */ - if (mask && strcmp(addr, "0.0.0.0")) { + if (mask && addr && strcmp(addr, "0.0.0.0")) { if (inet_pton(AF_INET, mask, &sin->sin_addr) == -1) ret = ioctl(sd, SIOCSIFNETMASK, &ifr); }