ipv4: mask tos for input route

Julian Anastasov · davem330 · commit 6e28099d38c0 · 2017-02-26T11:03:38.000-05:00
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: 89aef89 ("ipv4: Delete routing cache.") Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
@@ -2009,6 +2009,7 @@ 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.

Original file line number	Diff line number	Diff line change
`@@ -2009,6 +2009,7 @@ int ip_route_input_noref(struct sk_buff *skb, __be32 daddr, __be32 saddr,`
`2009`	`2009`	`{`
`2010`	`2010`	`int res;`
`2011`	`2011`
	`2012`	`+ tos &= IPTOS_RT_MASK;`
`2012`	`2013`	`rcu_read_lock();`
`2013`	`2014`
`2014`	`2015`	`/* Multicast recognition logic is moved from route cache to here.`