diff options
Diffstat (limited to 'drivers/net/tun.c')
| -rw-r--r-- | drivers/net/tun.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 970ec4793442..5b5d87585d91 100644 --- a/drivers/net/tun.c +++ b/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++; |