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: Jiri Slaby <jslaby@suse.cz>

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index fd281108625741372b7bc39b44eb954f6b19ea41..1b180691086cdd0a78dc3a67f74bd3babab9b0f2 100644 (file)
--- 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.