netfilter: nf_tables: add missing ->release_ops() in error path of newrule()

->release_ops() callback releases resources and this is used in error path.
If nf_tables_newrule() fails after ->select_ops(), it should release
resources. but it can not call ->destroy() because that should be called
after ->init().
At this point, ->release_ops() should be used for releasing resources.

Test commands:
   modprobe -rv xt_tcpudp
   iptables-nft -I INPUT -m tcp   <-- error command
   lsmod

Result:
   Module                  Size  Used by
   xt_tcpudp              20480  2      <-- it should be 0

Fixes: b8e204006340 ("netfilter: nft_compat: use .release_ops and remove list of extension")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 513f931186043f2ded3f1844374decd79768c44b..ef7772e976cc802afc64ea25d28f1fbecde773be 100644 (file)
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -2806,8 +2806,11 @@ err2:
        nf_tables_rule_release(&ctx, rule);
 err1:
        for (i = 0; i < n; i++) {
-               if (info[i].ops != NULL)
+               if (info[i].ops) {
                        module_put(info[i].ops->type->owner);
+                       if (info[i].ops->type->release_ops)
+                               info[i].ops->type->release_ops(info[i].ops);
+               }
        }
        kvfree(info);
        return err;