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Commit 6b600b26 authored by Steffen Klassert's avatar Steffen Klassert Committed by David S. Miller
Browse files

route: Use the device mtu as the default for blackhole routes 



As it is, we return null as the default mtu of blackhole routes.
This may lead to a propagation of a bogus pmtu if the default_mtu
method of a blackhole route is invoked. So return dst->dev->mtu
as the default mtu instead.

Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent df07a94c

net/ipv4/route.c

+1 −1
Original line number Diff line number Diff line
@@ -2757,7 +2757,7 @@ static struct dst_entry *ipv4_blackhole_dst_check(struct dst_entry *dst, u32 coo 


static unsigned int ipv4_blackhole_default_mtu(const struct dst_entry *dst)

{

	return 0;

	return dst->dev->mtu;

}



static void ipv4_rt_blackhole_update_pmtu(struct dst_entry *dst, u32 mtu)

net/ipv6/route.c

+1 −1
Original line number Diff line number Diff line
@@ -157,7 +157,7 @@ static struct dst_ops ip6_dst_ops_template = { 


static unsigned int ip6_blackhole_default_mtu(const struct dst_entry *dst)

{

	return 0;

	return dst->dev->mtu;

}



static void ip6_rt_blackhole_update_pmtu(struct dst_entry *dst, u32 mtu)