linux-kernel - [PATCH 3.12 088/122] tcp: ipv4: initialize unicast_sock sk_pacing

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Message-Id: <5e1ab4d77a27e1c6f17101261f8aa759720a203e.1424099974.git.jslaby@suse.cz>
Date:	Tue, 17 Feb 2015 12:34:35 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 088/122] tcp: ipv4: initialize unicast_sock sk_pacing_rate

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

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

===============

[ Upstream commit 811230cd853d62f09ed0addd0ce9a1b9b0e13fb5 ]

When I added sk_pacing_rate field, I forgot to initialize its value
in the per cpu unicast_sock used in ip_send_unicast_reply()

This means that for sch_fq users, RST packets, or ACK packets sent
on behalf of TIME_WAIT sockets might be sent to slowly or even dropped
once we reach the per flow limit.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Fixes: 95bd09eb2750 ("tcp: TSO packets automatic sizing")
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 net/ipv4/ip_output.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index c2dcee28d071..860c60d94254 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -1462,6 +1462,7 @@ static DEFINE_PER_CPU(struct inet_sock, unicast_sock) = {
 		.sk_wmem_alloc	= ATOMIC_INIT(1),
 		.sk_allocation	= GFP_ATOMIC,
 		.sk_flags	= (1UL << SOCK_USE_WRITE_QUEUE),
+		.sk_pacing_rate = ~0U,
 	},
 	.pmtudisc	= IP_PMTUDISC_WANT,
 	.uc_ttl		= -1,
-- 
2.2.2

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