From: Julian Anastasov <ja@ssi.bg>
Date: Sun, 26 Feb 2017 15:14:35 +0000 (+0200)
Subject: ipv4: mask tos for input route
X-Git-Tag: C0P2-H0.0--20200415~9837
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=36931eb015ee44fe2c8f220b46500b25f7282442;p=linux.git

ipv4: mask tos for input route

[ 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@gmail.com>

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

Fixes: 89aef8921bfb ("ipv4: Delete routing cache.")
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index d851cae27dac..17e6fbf30448 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1968,6 +1968,7 @@ 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.