linux-kernel - [PATCH 021/104] tcp: tcp_make_synack() should use sock

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Date:	Thu, 10 Oct 2013 08:41:09 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Phil Oester <kernel@...uxace.com>,
	"David S. Miller" <davem@...emloft.net>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 021/104] tcp: tcp_make_synack() should use sock_wmalloc

3.8.13.11 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Phil Oester <kernel@...uxace.com>

commit eb8895debe1baba41fcb62c78a16f0c63c21662a upstream.

In commit 90ba9b19 (tcp: tcp_make_synack() can use alloc_skb()), Eric changed
the call to sock_wmalloc in tcp_make_synack to alloc_skb.  In doing so,
the netfilter owner match lost its ability to block the SYNACK packet on
outbound listening sockets.  Revert the change, restoring the owner match
functionality.

This closes netfilter bugzilla #847.

Signed-off-by: Phil Oester <kernel@...uxace.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
[ kamal: backport to 3.8 ]
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 net/ipv4/tcp_output.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 0bdd879..436d8fb 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2705,8 +2705,8 @@ struct sk_buff *tcp_make_synack(struct sock *sk, struct dst_entry *dst,
 
 	if (cvp != NULL && cvp->s_data_constant && cvp->s_data_desired)
 		s_data_desired = cvp->s_data_desired;
-	skb = alloc_skb(MAX_TCP_HEADER + 15 + s_data_desired,
-			sk_gfp_atomic(sk, GFP_ATOMIC));
+	skb = sock_wmalloc(sk, MAX_TCP_HEADER + 15 + s_data_desired, 1,
+			GFP_ATOMIC);
 	if (unlikely(!skb)) {
 		dst_release(dst);
 		return NULL;
-- 
1.8.1.2

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