From efcd1def57beb3a6818781d0fa99a46c80f9f09e Mon Sep 17 00:00:00 2001
From: Rusty Russell <rusty@rustcorp.com.au>
Date: Sat, 12 Apr 2008 18:49:30 -0700
Subject: [PATCH] --- yaml --- r: 88311 b: refs/heads/master c:
 e01bf1c83332c4653ffd30eed20a94a9c83d82b2 h: refs/heads/master i:   88309:
 498e1645b964eb1504fcf660f2c586f7ff97321d   88307:
 91d0654d68e92eb99453251a0ee1f48c5f4e1473   88303:
 2edba1bb26aa0eb35b9d14777a0242591228dbd0 v: v3

---
 [refs]                  | 2 +-
 trunk/drivers/net/tun.c | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index 65677d86b214..7f78893df89f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 14daa02139dcb3193b2b0250c0720a23ef610c49
+refs/heads/master: e01bf1c83332c4653ffd30eed20a94a9c83d82b2
diff --git a/trunk/drivers/net/tun.c b/trunk/drivers/net/tun.c
index 970ec4793442..5b5d87585d91 100644
--- a/trunk/drivers/net/tun.c
+++ b/trunk/drivers/net/tun.c
@@ -286,8 +286,11 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun, struct iovec *iv,
 			return -EFAULT;
 	}
 
-	if ((tun->flags & TUN_TYPE_MASK) == TUN_TAP_DEV)
+	if ((tun->flags & TUN_TYPE_MASK) == TUN_TAP_DEV) {
 		align = NET_IP_ALIGN;
+		if (unlikely(len < ETH_HLEN))
+			return -EINVAL;
+	}
 
 	if (!(skb = alloc_skb(len + align, GFP_KERNEL))) {
 		tun->dev->stats.rx_dropped++;