[NETFILTER]: x_tables: fix xt_register_table error propagation

When xt_register_table fails the error is not properly propagated back.
Based on patch by Lepton Wu <ytht.net@gmail.com>.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 6 insertions, 3 deletions

diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index d0d19192026d..ad39bf640567 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -1120,7 +1120,8 @@ int arpt_register_table(struct arpt_table *table,
                 return ret;
         }
 
-        if (xt_register_table(table, &bootstrap, newinfo) != 0) {
+        ret = xt_register_table(table, &bootstrap, newinfo);
+        if (ret != 0) {
                 xt_free_table_info(newinfo);
                 return ret;
         }
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index 706c0025ec5e..7aaaf92efb59 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -2113,7 +2113,8 @@ int ipt_register_table(struct xt_table *table, const struct ipt_replace *repl)
                 return ret;
         }
 
-        if (xt_register_table(table, &bootstrap, newinfo) != 0) {
+        ret = xt_register_table(table, &bootstrap, newinfo);
+        if (ret != 0) {
                 xt_free_table_info(newinfo);
                 return ret;
         }
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 2e72f89a7019..0b5bd5587a3e 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -1281,7 +1281,8 @@ int ip6t_register_table(struct xt_table *table,
                 return ret;
         }
 
-        if (xt_register_table(table, &bootstrap, newinfo) != 0) {
+        ret = xt_register_table(table, &bootstrap, newinfo);
+        if (ret != 0) {
                 xt_free_table_info(newinfo);
                 return ret;
         }