[PATCH] selftests: netfilter: Fix the bug of missing return values

[guanjing]

Fixed the bug of some functions were missing return values.

Fixes: eff3c558bb7e ("netfilter: ctnetlink: support filtering by zone")
Signed-off-by: Guan Jing <guanj...@cmss.chinamobile.com>
---
 .../testing/selftests/net/netfilter/conntrack_dump_flush.c  | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c 
b/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c
index 254ff03297f0..5f827e10717d 100644
--- a/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c
+++ b/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c
@@ -43,6 +43,8 @@ static int build_cta_tuple_v4(struct nlmsghdr *nlh, int type,
        mnl_attr_nest_end(nlh, nest_proto);
 
        mnl_attr_nest_end(nlh, nest);
+
+       return 0;
 }
 
 static int build_cta_tuple_v6(struct nlmsghdr *nlh, int type,
@@ -71,6 +73,8 @@ static int build_cta_tuple_v6(struct nlmsghdr *nlh, int type,
        mnl_attr_nest_end(nlh, nest_proto);
 
        mnl_attr_nest_end(nlh, nest);
+
+       return 0;
 }
 
 static int build_cta_proto(struct nlmsghdr *nlh)
@@ -90,6 +94,8 @@ static int build_cta_proto(struct nlmsghdr *nlh)
        mnl_attr_nest_end(nlh, nest_proto);
 
        mnl_attr_nest_end(nlh, nest);
+
+       return 0;
 }
 
 static int conntrack_data_insert(struct mnl_socket *sock, struct nlmsghdr *nlh,
-- 
2.33.0