packet: do skb_probe_transport_header when we actually have data

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[ Upstream commit efdfa2f784 ]

In tpacket_fill_skb() commit c1aad275b0 ("packet: set transport
header before doing xmit") and later on 40893fd0fd ("net: switch
to use skb_probe_transport_header()") was probing for a transport
header on the skb from a ring buffer slot, but at a time, where
the skb has _not even_ been filled with data yet. So that call into
the flow dissector is pretty useless. Lets do it after we've set
up the skb frags.

Fixes: c1aad275b0 ("packet: set transport header before doing xmit")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

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Daniel Borkmann 2015-11-11 23:25:40 +01:00 • committed by Sasha Levin

parent e5d4fd3e2e

commit 22fb967dc3

1 changed files with 3 additions and 2 deletions

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net/packet/af_packet.c

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