diff options
| author | David Ahern <dsahern@gmail.com> | 2018-02-06 21:14:12 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-02-08 03:52:06 +0100 |
| commit | 58e354c01b1906b603dcdb28ec35250b09eac625 (patch) | |
| tree | 65ebc8f3b280af5bdc609859f3ec880a9beb9af1 /net | |
| parent | sun: Add SPDX license tags to Sun network drivers (diff) | |
| download | linux-58e354c01b1906b603dcdb28ec35250b09eac625.tar.xz linux-58e354c01b1906b603dcdb28ec35250b09eac625.zip | |
net/ipv6: Handle reject routes with onlink flag
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: fc1e64e1092f ("net/ipv6: Add support for onlink flag")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/route.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index fb2d251c0500..69c43d289c69 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -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; } |