From e9b2f4617a4e631eae1717a6264cbb3e405f377f Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 19 Jul 2017 13:33:24 -0700 Subject: [PATCH] net: Zero terminate ifr_name in dev_ifname(). [ Upstream commit 63679112c536289826fec61c917621de95ba2ade ] The ifr.ifr_name is passed around and assumed to be NULL terminated. Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/core/dev_ioctl.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c index b94b1d293506..151e047ce072 100644 --- a/net/core/dev_ioctl.c +++ b/net/core/dev_ioctl.c @@ -28,6 +28,7 @@ static int dev_ifname(struct net *net, struct ifreq __user *arg) if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) return -EFAULT; + ifr.ifr_name[IFNAMSIZ-1] = 0; error = netdev_get_name(net, ifr.ifr_name, ifr.ifr_ifindex); if (error) -- 2.11.0