Commit fa1e492a authored by Steffen Klassert's avatar Steffen Klassert Committed by David S. Miller
Browse files

ipv4: Don't update the pmtu on mtu locked routes 



Routes with locked mtu should not use learned pmtu informations,
so do not update the pmtu on these routes.

Reported-by: default avatarJulian Anastasov <ja@ssi.bg>
Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 38d523e2

net/ipv4/route.c

+3 −0
Original line number Diff line number Diff line
@@ -912,6 +912,9 @@ static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu) 
	struct dst_entry *dst = &rt->dst;

	struct fib_result res;



	if (dst_metric_locked(dst, RTAX_MTU))

		return;



	if (dst->dev->mtu < mtu)

		return;