[PATCH 3.16 168/212] ipv4: mask tos for input route

From: Ben Hutchings
Date: Thu Jun 01 2017 - 12:01:15 EST


3.16.44-rc1 review patch. If anyone has any objections, please let me know.

------------------

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: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
net/ipv4/route.c | 1 +
1 file changed, 1 insertion(+)

--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1879,6 +1879,7 @@ int ip_route_input_noref(struct sk_buff
{
int res;

+ tos &= IPTOS_RT_MASK;
rcu_read_lock();

/* Multicast recognition logic is moved from route cache to here.