4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: "David S. Miller" <davem@xxxxxxxxxxxxx> [ Upstream commit 63679112c536289826fec61c917621de95ba2ade ] The ifr.ifr_name is passed around and assumed to be NULL terminated. Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/core/dev_ioctl.c | 1 + 1 file changed, 1 insertion(+) --- a/net/core/dev_ioctl.c +++ b/net/core/dev_ioctl.c @@ -28,6 +28,7 @@ static int dev_ifname(struct net *net, s 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)