[IPV4] nl_fib_lookup: Initialise res.r before fib_res_put(&res)

When CONFIG_IP_MULTIPLE_TABLES is enabled, the code in nl_fib_lookup()
needs to initialize the res.r field before fib_res_put(&res) - unlike
fib_lookup(), a direct call to ->tb_lookup does not set this field.

Signed-off-by: Sergey Vlasov <vsu@altlinux.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 953dd458c23..837f2957fa8 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -777,6 +777,10 @@ static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb )
                                                             .tos = frn->fl_tos,
                                                             .scope = frn->fl_scope } } };
 
+#ifdef CONFIG_IP_MULTIPLE_TABLES
+        res.r = NULL;
+#endif
+
         frn->err = -ENOENT;
         if (tb) {
                 local_bh_disable();