qeth: discard inbound packets with unknown header id

Debugging statements are added for inbound packets with unknown
header id. Those packets are discarded and no longer processed as
osn-packets.

Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index 6d7b79e2ba92..c67e7dfd56cc 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -2702,10 +2702,15 @@ qeth_process_inbound_buffer(struct qeth_card *card,
                         qeth_layer2_rebuild_skb(card, skb, hdr);
                 else if (hdr->hdr.l3.id == QETH_HEADER_TYPE_LAYER3)
                         vlan_tag = qeth_rebuild_skb(card, skb, hdr);
-                else { /*in case of OSN*/
+                else if (hdr->hdr.osn.id == QETH_HEADER_TYPE_OSN) {
                         skb_push(skb, sizeof(struct qeth_hdr));
                         skb_copy_to_linear_data(skb, hdr,
                                                 sizeof(struct qeth_hdr));
+                } else { /* unknown header type */
+                        dev_kfree_skb_any(skb);
+                        QETH_DBF_TEXT(trace, 3, "inbunkno");
+                        QETH_DBF_HEX(control, 3, hdr, QETH_DBF_CONTROL_LEN);
+                        continue;
                 }
                 /* is device UP ? */
                 if (!(card->dev->flags & IFF_UP)){