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| author | David S. Miller <davem@davemloft.net> | 2021-03-09 16:12:20 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-03-09 16:12:20 -0800 |
| commit | b005c9ef5adaf1357b7faa977330eaae18647300 (patch) | |
| tree | aa561ac181147df2e9c5b52ed67706e2e26ba9c9 /include/linux/virtio_net.h | |
| parent | 286a8624d7f9c6505cd568d947772eb59646514b (diff) | |
| parent | d348ede32e99d3a04863e9f9b28d224456118c27 (diff) | |
Merge branch 'virtio_net-infinite-loop'
Balazs Nemeth says:
====================
net: prevent infinite loop caused by incorrect proto from virtio_net_hdr_set_proto
These patches prevent an infinite loop for gso packets with a protocol
from virtio net hdr that doesn't match the protocol in the packet.
Note that packets coming from a device without
header_ops->parse_protocol being implemented will not be caught by
the check in virtio_net_hdr_to_skb, but the infinite loop will still
be prevented by the check in the gso layer.
Changes from v2 to v3:
- Remove unused *eth.
- Use MPLS_HLEN to also check if the MPLS header length is a multiple
of four.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/virtio_net.h')
| -rw-r--r-- | include/linux/virtio_net.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h index e8a924eeea3d..6b5fcfa1e555 100644 --- a/include/linux/virtio_net.h +++ b/include/linux/virtio_net.h @@ -79,8 +79,13 @@ static inline int virtio_net_hdr_to_skb(struct sk_buff *skb, if (gso_type && skb->network_header) { struct flow_keys_basic keys; - if (!skb->protocol) + if (!skb->protocol) { + __be16 protocol = dev_parse_header_protocol(skb); + virtio_net_hdr_set_proto(skb, hdr); + if (protocol && protocol != skb->protocol) + return -EINVAL; + } retry: if (!skb_flow_dissect_flow_keys_basic(NULL, skb, &keys, NULL, 0, 0, 0, |