1 files changed, 12 insertions, 2 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 6ad6fe706312..63042596f0cf 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -736,8 +736,18 @@ static __inline__ ssize_t tun_put_user(struct tun_struct *tun,
                                 gso.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
                         else if (sinfo->gso_type & SKB_GSO_UDP)
                                 gso.gso_type = VIRTIO_NET_HDR_GSO_UDP;
-                        else
-                                BUG();
+                        else {
+                                printk(KERN_ERR "tun: unexpected GSO type: "
+                                       "0x%x, gso_size %d, hdr_len %d\n",
+                                       sinfo->gso_type, gso.gso_size,
+                                       gso.hdr_len);
+                                print_hex_dump(KERN_ERR, "tun: ",
+                                               DUMP_PREFIX_NONE,
+                                               16, 1, skb->head,
+                                               min((int)gso.hdr_len, 64), true);
+                                WARN_ON_ONCE(1);
+                                return -EINVAL;
+                        }
                         if (sinfo->gso_type & SKB_GSO_TCP_ECN)
                                 gso.gso_type |= VIRTIO_NET_HDR_GSO_ECN;
                 } else