redonkable/remarkable-linux
redonkable/remarkable-linux
1
0
Fork 0
Code Releases Activity

net/ipv6: Handle reject routes with onlink flag

Browse source 
Verification of nexthops with onlink flag need to handle unreachable
routes. The lookup is only intended to validate the gateway address
is not a local address and if the gateway resolves the egress device
must match the given device. Hence, hitting any default reject route
is ok.

Fixes: fc1e64e109 ("net/ipv6: Add support for onlink flag")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2018-02-06 12:14:12 -08:00 committed by David S. Miller
parent c861ef83d7
commit 58e354c01b
1 changed files with 2 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
net/ipv6/route.c
View file

@ -2488,7 +2488,8 @@ static int ip6_route_check_nh_onlink(struct net *net,
err = 0;
grt = ip6_nh_lookup_table(net, cfg, gw_addr, tbid, 0);
if (grt) {
if (grt->rt6i_flags & flags || dev != grt->dst.dev) {
if (!grt->dst.error &&
(grt->rt6i_flags & flags || dev != grt->dst.dev)) {
NL_SET_ERR_MSG(extack, "Nexthop has invalid gateway");
err = -EINVAL;
}