[PATCH 3.10 170/250] ipv4: mask tos for input route

[Willy Tarreau]

From: Julian Anastasov <ja@xxxxxx>

commit 6e28099d38c0e50d62c1afc054e37e573adf3d21 upstream.

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@xxxxxxxxx>

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

Fixes: 89aef8921bfb ("ipv4: Delete routing cache.")
Signed-off-by: Julian Anastasov <ja@xxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Willy Tarreau <w@xxxxxx>
---
 net/ipv4/route.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index e59d633..d9c7913 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1789,6 +1789,7 @@ 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.
-- 
2.8.0.rc2.1.gbe9624a