From 03dd4cb26d967f9588437b0fc9cc0e8353322bb7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Fri, 25 Mar 2016 03:53:42 -0300 Subject: Linux-libre 4.5-gnu --- drivers/net/tun.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/net/tun.c') diff --git a/drivers/net/tun.c b/drivers/net/tun.c index f0db770e8..88bb8cc35 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1095,6 +1095,9 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile, u32 rxhash; ssize_t n; + if (!(tun->dev->flags & IFF_UP)) + return -EIO; + if (!(tun->flags & IFF_NO_PI)) { if (len < sizeof(pi)) return -EINVAL; -- cgit v1.2.3