linux-kernel - [PATCH 3.12 026/142] ipv4: mask tos for input route

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Message-Id: <a932e0a1a101e031b2b2eff4a87a80e9398ef6c5.1491838390.git.jslaby@suse.cz>
Date:   Mon, 10 Apr 2017 17:31:47 +0200
From:   Jiri Slaby <jslaby@...e.cz>
To:     stable@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Julian Anastasov <ja@....bg>,
        "David S . Miller" <davem@...emloft.net>,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 026/142] ipv4: mask tos for input route

From: Julian Anastasov <ja@....bg>

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

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

[ Upstream commit 6e28099d38c0e50d62c1afc054e37e573adf3d21 ]

Restore the lost masking of TOS in input route code to
allow ip rules to match it properly.

Problem [1] noticed by Shmulik Ladkani <shmulik.ladkani@...il.com>

[1] http://marc.info/?t=137331755300040&r=1&w=2

Fixes: 89aef8921bfb ("ipv4: Delete routing cache.")
Signed-off-by: Julian Anastasov <ja@....bg>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 net/ipv4/route.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index fd2811086257..1b180691086c 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1881,6 +1881,7 @@ int ip_route_input_noref(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 {
 	int res;
 
+	tos &= IPTOS_RT_MASK;
 	rcu_read_lock();
 
 	/* Multicast recognition logic is moved from route cache to here.
-- 
2.12.2