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virtio-net: free bufs correctly on invalid packet length 

When a packet with invalid length arrives, ensure that the packet
is freed correctly if mergeable packet buffers and big packets
(GUEST_TSO4) are both enabled.

Signed-off-by: Michael Dalton <mwdalton@google.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Dalton 2013-12-05 13:14:05 -08:00 committed by David S. Miller
parent a328f3a059
commit 98bfd23cdb
1 changed files with 3 additions and 3 deletions
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6
drivers/net/virtio_net.c
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@ -426,10 +426,10 @@ static void receive_buf(struct receive_queue *rq, void *buf, unsigned int len)
if (unlikely(len < sizeof(struct virtio_net_hdr) + ETH_HLEN)) {
pr_debug("%s: short packet %i\n", dev->name, len);
dev->stats.rx_length_errors++;
if (vi->big_packets)
give_pages(rq, buf);
else if (vi->mergeable_rx_bufs)
if (vi->mergeable_rx_bufs)
put_page(virt_to_head_page(buf));
else if (vi->big_packets)
give_pages(rq, buf);
else
dev_kfree_skb(buf);
return;