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Commit 214f45c9 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

net: provide default_advmss() methods to blackhole dst_ops 



Commit 0dbaee3b (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: default avatarGeorge Spelvin <linux@horizon.com>
Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ed199fac

net/ipv4/route.c

+1 −0
Original line number Diff line number Diff line
@@ -2722,6 +2722,7 @@ static struct dst_ops ipv4_dst_blackhole_ops = { 
	.destroy		=	ipv4_dst_destroy,

	.check			=	ipv4_blackhole_dst_check,

	.default_mtu		=	ipv4_blackhole_default_mtu,

	.default_advmss		=	ipv4_default_advmss,

	.update_pmtu		=	ipv4_rt_blackhole_update_pmtu,

};

net/ipv6/route.c

+1 −0
Original line number Diff line number Diff line
@@ -128,6 +128,7 @@ static struct dst_ops ip6_dst_blackhole_ops = { 
	.destroy		=	ip6_dst_destroy,

	.check			=	ip6_dst_check,

	.default_mtu		=	ip6_blackhole_default_mtu,

	.default_advmss		=	ip6_default_advmss,

	.update_pmtu		=	ip6_rt_blackhole_update_pmtu,

};