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net: Skip GSO length estimation if transport header is not set

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qdisc_pkt_len_init expects transport_header to be set for GSO packets.
Patch [1] skips transport_header validation for GSO packets that don't
have network_header set at the moment of calling virtio_net_hdr_to_skb,
and allows them to pass into the stack. After patch [2] no placeholder
value is assigned to transport_header if dissection fails, so this patch
adds a check to the place where the value of transport_header is used.

[1] https://patchwork.ozlabs.org/patch/1044429/
[2] https://patchwork.ozlabs.org/patch/1046122/

Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Maxim Mikityanskiy 2019-02-22 12:55:22 +00:00 committed by David S. Miller
parent 0a6c33e894
commit a0dce87521
1 changed files with 1 additions and 1 deletions
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net/core/dev.c
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@ -3421,7 +3421,7 @@ static void qdisc_pkt_len_init(struct sk_buff *skb)
/* To get more precise estimation of bytes sent on wire, /* To get more precise estimation of bytes sent on wire,
* we add to pkt_len the headers size of all segments * we add to pkt_len the headers size of all segments
*/ */
if (shinfo->gso_size) { if (shinfo->gso_size && skb_transport_header_was_set(skb)) {
unsigned int hdr_len; unsigned int hdr_len;
u16 gso_segs = shinfo->gso_segs; u16 gso_segs = shinfo->gso_segs;