From f67ed26f2b3e92c0450deae3ffc3fff21c878a75 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Thu, 23 Mar 2006 22:47:40 -0800 Subject: [PATCH] [NET]: Ensure device name passed to SO_BINDTODEVICE is NULL terminated. Found by Solar Designer. Signed-off-by: David S. Miller --- net/core/sock.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/net/core/sock.c b/net/core/sock.c index 1a7e6eac90b0..e110b9004147 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -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; -- 2.20.1