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authorEric Dumazet <edumazet@google.com>2016-08-24 08:50:24 -0700
committerDavid S. Miller <davem@davemloft.net>2016-08-25 16:43:11 -0700
commite65c332de8a0c9f570847ec490b60effffcd5320 (patch)
treed0e4808dc464c2ac1b3914c8a49ee95a1b11e1ff /net/ipv4
parentbb40aca7cf153e3e2941140d3850a4b6c4205ccb (diff)
tcp: md5: increment sk_drops on syn_recv state
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>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/tcp_ipv4.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 32b048e524d6..436d978c6c39 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -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;
}