netdev - [PATCH net-next] tcp: remove redundant checks II

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Date:	Thu, 04 Jun 2015 08:01:12 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>
Subject: [PATCH net-next] tcp: remove redundant checks II

From: Eric Dumazet <edumazet@...gle.com>

For same reasons than in commit 12e25e1041d0 ("tcp: remove redundant
checks"), we can remove redundant checks done for timewait sockets.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 net/ipv4/tcp_ipv4.c |    4 ----
 net/ipv6/tcp_ipv6.c |    4 ----
 2 files changed, 8 deletions(-)

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 3130c42240c8..d7d4c2b79cf2 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1671,10 +1671,6 @@ do_time_wait:
 		goto discard_it;
 	}
 
-	if (skb->len < (th->doff << 2)) {
-		inet_twsk_put(inet_twsk(sk));
-		goto bad_packet;
-	}
 	if (tcp_checksum_complete(skb)) {
 		inet_twsk_put(inet_twsk(sk));
 		goto csum_error;
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index b72e1ffc6bb4..45a7176ed460 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1467,10 +1467,6 @@ do_time_wait:
 
 	tcp_v6_fill_cb(skb, hdr, th);
 
-	if (skb->len < (th->doff<<2)) {
-		inet_twsk_put(inet_twsk(sk));
-		goto bad_packet;
-	}
 	if (tcp_checksum_complete(skb)) {
 		inet_twsk_put(inet_twsk(sk));
 		goto csum_error;



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