[PATCH] net: Zero terminate ifr_name in dev_ifname().
From: David Miller <davem@davemloft.net>
Date: 2017-07-19 20:34:10
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
The ifr.ifr_name is passed around and assumed to be NULL terminated. Signed-off-by: David S. Miller <davem@davemloft.net> --- 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 7657ad6bc13d..06b147d7d9e2 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)
--
2.13.3