diff options
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/route.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 6f4a35096bde..98fce6f4a580 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1624,6 +1624,16 @@ int ip6_route_add(struct fib6_config *cfg) int gwa_type; gw_addr = &cfg->fc_gateway; + + /* if gw_addr is local we will fail to detect this in case + * address is still TENTATIVE (DAD in progress). rt6_lookup() + * will return already-added prefix route via interface that + * prefix route was assigned to, which might be non-loopback. + */ + err = -EINVAL; + if (ipv6_chk_addr_and_flags(net, gw_addr, NULL, 0, 0)) + goto out; + rt->rt6i_gateway = *gw_addr; gwa_type = ipv6_addr_type(gw_addr); @@ -1637,7 +1647,6 @@ int ip6_route_add(struct fib6_config *cfg) (SIT, PtP, NBMA NOARP links) it is handy to allow some exceptions. --ANK */ - err = -EINVAL; if (!(gwa_type & IPV6_ADDR_UNICAST)) goto out; |