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net: flow_dissector: fix thoff for IPPROTO_AH

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In commit 8ed781668d ("flow_keys: include thoff into flow_keys for
later usage"), we missed that existing code was using nhoff as a
temporary variable that could not always contain transport header
offset.

This is not a problem for TCP/UDP because port offset (@poff)
is 0 for these protocols.

Signed-off-by: Eric Dumazet <[email protected]>
Cc: Daniel Borkmann <[email protected]>
Cc: Nikolay Aleksandrov <[email protected]>
Acked-by: Nikolay Aleksandrov <[email protected]>
Acked-by: Daniel Borkmann <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eric Dumazet 2013-09-26 08:44:06 -07:00 • committed by David S. Miller
commit b86783587b
1 changed files with 2 additions and 2 deletions
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4
net/core/flow_dissector.c
View file

@ -154,8 +154,8 @@ ipv6:
if (poff >= 0) {
__be32 *ports, _ports;
nhoff += poff;
ports = skb_header_pointer(skb, nhoff, sizeof(_ports), &_ports);
ports = skb_header_pointer(skb, nhoff + poff,
sizeof(_ports), &_ports);
if (ports)
flow->ports = *ports;
}