Commit f67ed26f authored by David S. Miller's avatar David S. Miller Committed by David S. Miller

[NET]: Ensure device name passed to SO_BINDTODEVICE is NULL terminated.

Found by Solar Designer.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a1a8feed
......@@ -404,8 +404,9 @@ set_rcvbuf:
if (!valbool) {
sk->sk_bound_dev_if = 0;
} else {
if (optlen > IFNAMSIZ)
optlen = IFNAMSIZ;
if (optlen > IFNAMSIZ - 1)
optlen = IFNAMSIZ - 1;
memset(devname, 0, sizeof(devname));
if (copy_from_user(devname, optval, optlen)) {
ret = -EFAULT;
break;
......
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