ipv4: Handle ipv6 gateway in fib_good_nh

Update fib_good_nh to handle an ipv6 gateway.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 2 deletions

diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index e5a6d431bfab..c1ea138335a2 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -1909,8 +1909,14 @@ static bool fib_good_nh(const struct fib_nh *nh)
 
                 rcu_read_lock_bh();
 
-                n = __ipv4_neigh_lookup_noref(nh->fib_nh_dev,
-                                              (__force u32)nh->fib_nh_gw4);
+                if (likely(nh->fib_nh_gw_family == AF_INET))
+                        n = __ipv4_neigh_lookup_noref(nh->fib_nh_dev,
+                                                   (__force u32)nh->fib_nh_gw4);
+                else if (nh->fib_nh_gw_family == AF_INET6)
+                        n = __ipv6_neigh_lookup_noref_stub(nh->fib_nh_dev,
+                                                           &nh->fib_nh_gw6);
+                else
+                        n = NULL;
                 if (n)
                         state = n->nud_state;