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net: provide default_advmss() methods to blackhole dst_ops

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Commit 0dbaee3b37 (net: Abstract default ADVMSS behind an
accessor.) introduced a possible crash in tcp_connect_init(), when
dst->default_advmss() is called from dst_metric_advmss()

Reported-by: George Spelvin <linux@horizon.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2011-02-18 11:39:01 -08:00 committed by David S. Miller
parent ed199facd0
commit 214f45c91b
2 changed files with 2 additions and 0 deletions
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1
net/ipv4/route.c
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@ -2722,6 +2722,7 @@ static struct dst_ops ipv4_dst_blackhole_ops = {
.destroy = ipv4_dst_destroy, .destroy = ipv4_dst_destroy,
.check = ipv4_blackhole_dst_check, .check = ipv4_blackhole_dst_check,
.default_mtu = ipv4_blackhole_default_mtu, .default_mtu = ipv4_blackhole_default_mtu,
.default_advmss = ipv4_default_advmss,
.update_pmtu = ipv4_rt_blackhole_update_pmtu, .update_pmtu = ipv4_rt_blackhole_update_pmtu,
}; };

1
net/ipv6/route.c
View File

@ -128,6 +128,7 @@ static struct dst_ops ip6_dst_blackhole_ops = {
.destroy = ip6_dst_destroy, .destroy = ip6_dst_destroy,
.check = ip6_dst_check, .check = ip6_dst_check,
.default_mtu = ip6_blackhole_default_mtu, .default_mtu = ip6_blackhole_default_mtu,
.default_advmss = ip6_default_advmss,
.update_pmtu = ip6_rt_blackhole_update_pmtu, .update_pmtu = ip6_rt_blackhole_update_pmtu,
}; };