@@ -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)
@@ -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)
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: Steffen Klassert <steffen.klassert@secunet.com> --- net/ipv4/route.c | 2 +- net/ipv6/route.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)