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tcp: md5: increment sk_drops on syn_recv state

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TCP MD5 mismatches do increment sk_drops counter in all states but
SYN_RECV.

This is very unlikely to happen in the real world, but worth adding
to help diagnostics.

We increase the parent (listener) sk_drops.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2016-08-24 08:50:24 -07:00 • committed by David S. Miller
parent bb40aca7cf
commit e65c332de8
2 changed files with 2 additions and 0 deletions
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1
net/ipv4/tcp_ipv4.c
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@ -1602,6 +1602,7 @@ process:
sk = req->rsk_listener;
if (unlikely(tcp_v4_inbound_md5_hash(sk, skb))) {
sk_drops_add(sk, skb);
reqsk_put(req);
goto discard_it;
}