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netfilter: nf_ct_tcp: wrong multiplication of TCPOLEN_TSTAMP_ALIGNED in tcp_sack skips fastpath

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The wrong multiplication of TCPOLEN_TSTAMP_ALIGNED by 4 skips the fast path
for the timestamp-only option. Bug reported by Michael M. Builov (netfilter
bugzilla #738).

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Jozsef Kadlecsik 2011-08-30 15:46:13 +02:00 committed by Patrick McHardy
parent 4a5cc84ae7
commit bb9fc37358
1 changed files with 1 additions and 1 deletions
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2
net/netfilter/nf_conntrack_proto_tcp.c
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@ -447,7 +447,7 @@ static void tcp_sack(const struct sk_buff *skb, unsigned int dataoff,
BUG_ON(ptr == NULL);
/* Fast path for timestamp-only option */
if (length == TCPOLEN_TSTAMP_ALIGNED*4
if (length == TCPOLEN_TSTAMP_ALIGNED
&& *(__be32 *)ptr == htonl((TCPOPT_NOP << 24)
| (TCPOPT_NOP << 16)
| (TCPOPT_TIMESTAMP << 8)