netfilter: xtables: change xt_match.checkentry return type

Restore function signatures from bool to int so that we can report
memory allocation failures or similar using -ENOMEM rather than
always having to pass -EINVAL back.

This semantic patch may not be too precise (checking for functions
that use xt_mtchk_param rather than functions referenced by
xt_match.checkentry), but reviewed, it produced the intended result.

// <smpl>
@@
type bool;
identifier check, par;
@@
-bool check
+int check
 (struct xt_mtchk_param *par) { ... }
// </smpl>

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

45 files changed, 50 insertions, 50 deletions

diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h
index dd9d15a73a96..33c1a62a0997 100644
--- a/include/linux/netfilter/x_tables.h
+++ b/include/linux/netfilter/x_tables.h
@@ -303,7 +303,7 @@ struct xt_match {
                       const struct xt_match_param *);
 
         /* Called when user tries to insert an entry of this type. */
-        bool (*checkentry)(const struct xt_mtchk_param *);
+        int (*checkentry)(const struct xt_mtchk_param *);
 
         /* Called when entry of this type deleted. */
         void (*destroy)(const struct xt_mtdtor_param *);
diff --git a/net/bridge/netfilter/ebt_802_3.c b/net/bridge/netfilter/ebt_802_3.c
index 5d1176758ca5..7b6f4c4cccb7 100644
--- a/net/bridge/netfilter/ebt_802_3.c
+++ b/net/bridge/netfilter/ebt_802_3.c
@@ -36,7 +36,7 @@ ebt_802_3_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return true;
 }
 
-static bool ebt_802_3_mt_check(const struct xt_mtchk_param *par)
+static int ebt_802_3_mt_check(const struct xt_mtchk_param *par)
 {
         const struct ebt_802_3_info *info = par->matchinfo;
 
diff --git a/net/bridge/netfilter/ebt_among.c b/net/bridge/netfilter/ebt_among.c
index 60ad6308bc1f..8a75d399b510 100644
--- a/net/bridge/netfilter/ebt_among.c
+++ b/net/bridge/netfilter/ebt_among.c
@@ -172,7 +172,7 @@ ebt_among_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return true;
 }
 
-static bool ebt_among_mt_check(const struct xt_mtchk_param *par)
+static int ebt_among_mt_check(const struct xt_mtchk_param *par)
 {
         const struct ebt_among_info *info = par->matchinfo;
         const struct ebt_entry_match *em =
diff --git a/net/bridge/netfilter/ebt_arp.c b/net/bridge/netfilter/ebt_arp.c
index e727697c5847..fc62055adb17 100644
--- a/net/bridge/netfilter/ebt_arp.c
+++ b/net/bridge/netfilter/ebt_arp.c
@@ -100,7 +100,7 @@ ebt_arp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return true;
 }
 
-static bool ebt_arp_mt_check(const struct xt_mtchk_param *par)
+static int ebt_arp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct ebt_arp_info *info = par->matchinfo;
         const struct ebt_entry *e = par->entryinfo;
diff --git a/net/bridge/netfilter/ebt_ip.c b/net/bridge/netfilter/ebt_ip.c
index 5de6df6f86b8..d1a555dc8878 100644
--- a/net/bridge/netfilter/ebt_ip.c
+++ b/net/bridge/netfilter/ebt_ip.c
@@ -77,7 +77,7 @@ ebt_ip_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return true;
 }
 
-static bool ebt_ip_mt_check(const struct xt_mtchk_param *par)
+static int ebt_ip_mt_check(const struct xt_mtchk_param *par)
 {
         const struct ebt_ip_info *info = par->matchinfo;
         const struct ebt_entry *e = par->entryinfo;
diff --git a/net/bridge/netfilter/ebt_ip6.c b/net/bridge/netfilter/ebt_ip6.c
index 63e3888d20cf..fa4ecf50fdc9 100644
--- a/net/bridge/netfilter/ebt_ip6.c
+++ b/net/bridge/netfilter/ebt_ip6.c
@@ -80,7 +80,7 @@ ebt_ip6_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return true;
 }
 
-static bool ebt_ip6_mt_check(const struct xt_mtchk_param *par)
+static int ebt_ip6_mt_check(const struct xt_mtchk_param *par)
 {
         const struct ebt_entry *e = par->entryinfo;
         struct ebt_ip6_info *info = par->matchinfo;
diff --git a/net/bridge/netfilter/ebt_limit.c b/net/bridge/netfilter/ebt_limit.c
index 5b7330b62541..abfb0ecd7c17 100644
--- a/net/bridge/netfilter/ebt_limit.c
+++ b/net/bridge/netfilter/ebt_limit.c
@@ -65,7 +65,7 @@ user2credits(u_int32_t user)
         return (user * HZ * CREDITS_PER_JIFFY) / EBT_LIMIT_SCALE;
 }
 
-static bool ebt_limit_mt_check(const struct xt_mtchk_param *par)
+static int ebt_limit_mt_check(const struct xt_mtchk_param *par)
 {
         struct ebt_limit_info *info = par->matchinfo;
 
diff --git a/net/bridge/netfilter/ebt_mark_m.c b/net/bridge/netfilter/ebt_mark_m.c
index 8de8c396d913..1e5b0b316fbe 100644
--- a/net/bridge/netfilter/ebt_mark_m.c
+++ b/net/bridge/netfilter/ebt_mark_m.c
@@ -22,7 +22,7 @@ ebt_mark_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return ((skb->mark & info->mask) == info->mark) ^ info->invert;
 }
 
-static bool ebt_mark_mt_check(const struct xt_mtchk_param *par)
+static int ebt_mark_mt_check(const struct xt_mtchk_param *par)
 {
         const struct ebt_mark_m_info *info = par->matchinfo;
 
diff --git a/net/bridge/netfilter/ebt_pkttype.c b/net/bridge/netfilter/ebt_pkttype.c
index e2a07e6cbef3..9b3c64516605 100644
--- a/net/bridge/netfilter/ebt_pkttype.c
+++ b/net/bridge/netfilter/ebt_pkttype.c
@@ -20,7 +20,7 @@ ebt_pkttype_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return (skb->pkt_type == info->pkt_type) ^ info->invert;
 }
 
-static bool ebt_pkttype_mt_check(const struct xt_mtchk_param *par)
+static int ebt_pkttype_mt_check(const struct xt_mtchk_param *par)
 {
         const struct ebt_pkttype_info *info = par->matchinfo;
 
diff --git a/net/bridge/netfilter/ebt_stp.c b/net/bridge/netfilter/ebt_stp.c
index 92a93d363765..521186fa6994 100644
--- a/net/bridge/netfilter/ebt_stp.c
+++ b/net/bridge/netfilter/ebt_stp.c
@@ -153,7 +153,7 @@ ebt_stp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return true;
 }
 
-static bool ebt_stp_mt_check(const struct xt_mtchk_param *par)
+static int ebt_stp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct ebt_stp_info *info = par->matchinfo;
         const uint8_t bridge_ula[6] = {0x01, 0x80, 0xc2, 0x00, 0x00, 0x00};
diff --git a/net/bridge/netfilter/ebt_vlan.c b/net/bridge/netfilter/ebt_vlan.c
index 5c44f51063c3..04a9575389d8 100644
--- a/net/bridge/netfilter/ebt_vlan.c
+++ b/net/bridge/netfilter/ebt_vlan.c
@@ -79,7 +79,7 @@ ebt_vlan_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return true;
 }
 
-static bool ebt_vlan_mt_check(const struct xt_mtchk_param *par)
+static int ebt_vlan_mt_check(const struct xt_mtchk_param *par)
 {
         struct ebt_vlan_info *info = par->matchinfo;
         const struct ebt_entry *e = par->entryinfo;
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index 09f6567a85b7..771ffa7b9aff 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -2176,7 +2176,7 @@ icmp_match(const struct sk_buff *skb, const struct xt_match_param *par)
                                     !!(icmpinfo->invflags&IPT_ICMP_INV));
 }
 
-static bool icmp_checkentry(const struct xt_mtchk_param *par)
+static int icmp_checkentry(const struct xt_mtchk_param *par)
 {
         const struct ipt_icmp *icmpinfo = par->matchinfo;
 
diff --git a/net/ipv4/netfilter/ipt_addrtype.c b/net/ipv4/netfilter/ipt_addrtype.c
index ea4f58a46c6e..81197f456d7f 100644
--- a/net/ipv4/netfilter/ipt_addrtype.c
+++ b/net/ipv4/netfilter/ipt_addrtype.c
@@ -70,7 +70,7 @@ addrtype_mt_v1(const struct sk_buff *skb, const struct xt_match_param *par)
         return ret;
 }
 
-static bool addrtype_mt_checkentry_v1(const struct xt_mtchk_param *par)
+static int addrtype_mt_checkentry_v1(const struct xt_mtchk_param *par)
 {
         struct ipt_addrtype_info_v1 *info = par->matchinfo;
 
diff --git a/net/ipv4/netfilter/ipt_ah.c b/net/ipv4/netfilter/ipt_ah.c
index 4f27e170c630..667ded16e120 100644
--- a/net/ipv4/netfilter/ipt_ah.c
+++ b/net/ipv4/netfilter/ipt_ah.c
@@ -55,7 +55,7 @@ static bool ah_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                          !!(ahinfo->invflags & IPT_AH_INV_SPI));
 }
 
-static bool ah_mt_check(const struct xt_mtchk_param *par)
+static int ah_mt_check(const struct xt_mtchk_param *par)
 {
         const struct ipt_ah *ahinfo = par->matchinfo;
 
diff --git a/net/ipv4/netfilter/ipt_ecn.c b/net/ipv4/netfilter/ipt_ecn.c
index e661108c73f1..d1e234fe7f1a 100644
--- a/net/ipv4/netfilter/ipt_ecn.c
+++ b/net/ipv4/netfilter/ipt_ecn.c
@@ -85,7 +85,7 @@ static bool ecn_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return true;
 }
 
-static bool ecn_mt_check(const struct xt_mtchk_param *par)
+static int ecn_mt_check(const struct xt_mtchk_param *par)
 {
         const struct ipt_ecn_info *info = par->matchinfo;
         const struct ipt_ip *ip = par->entryinfo;
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 41e2429c0163..595b45d52ff3 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -2209,7 +2209,7 @@ icmp6_match(const struct sk_buff *skb, const struct xt_match_param *par)
 }
 
 /* Called when user tries to insert an entry of this type. */
-static bool icmp6_checkentry(const struct xt_mtchk_param *par)
+static int icmp6_checkentry(const struct xt_mtchk_param *par)
 {
         const struct ip6t_icmp *icmpinfo = par->matchinfo;
 
diff --git a/net/ipv6/netfilter/ip6t_ah.c b/net/ipv6/netfilter/ip6t_ah.c
index 4429bfd39e11..3d570446deef 100644
--- a/net/ipv6/netfilter/ip6t_ah.c
+++ b/net/ipv6/netfilter/ip6t_ah.c
@@ -87,7 +87,7 @@ static bool ah_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
                 !(ahinfo->hdrres && ah->reserved);
 }
 
-static bool ah_mt6_check(const struct xt_mtchk_param *par)
+static int ah_mt6_check(const struct xt_mtchk_param *par)
 {
         const struct ip6t_ah *ahinfo = par->matchinfo;
 
diff --git a/net/ipv6/netfilter/ip6t_frag.c b/net/ipv6/netfilter/ip6t_frag.c
index 5c0da913b4ab..c2dba2701fa3 100644
--- a/net/ipv6/netfilter/ip6t_frag.c
+++ b/net/ipv6/netfilter/ip6t_frag.c
@@ -102,7 +102,7 @@ frag_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
                   (ntohs(fh->frag_off) & IP6_MF));
 }
 
-static bool frag_mt6_check(const struct xt_mtchk_param *par)
+static int frag_mt6_check(const struct xt_mtchk_param *par)
 {
         const struct ip6t_frag *fraginfo = par->matchinfo;
 
diff --git a/net/ipv6/netfilter/ip6t_hbh.c b/net/ipv6/netfilter/ip6t_hbh.c
index f4b73889d00a..1b294317707b 100644
--- a/net/ipv6/netfilter/ip6t_hbh.c
+++ b/net/ipv6/netfilter/ip6t_hbh.c
@@ -164,7 +164,7 @@ hbh_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
         return false;
 }
 
-static bool hbh_mt6_check(const struct xt_mtchk_param *par)
+static int hbh_mt6_check(const struct xt_mtchk_param *par)
 {
         const struct ip6t_opts *optsinfo = par->matchinfo;
 
diff --git a/net/ipv6/netfilter/ip6t_ipv6header.c b/net/ipv6/netfilter/ip6t_ipv6header.c
index 91490ad9302c..90e1e04b7932 100644
--- a/net/ipv6/netfilter/ip6t_ipv6header.c
+++ b/net/ipv6/netfilter/ip6t_ipv6header.c
@@ -118,7 +118,7 @@ ipv6header_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
         }
 }
 
-static bool ipv6header_mt6_check(const struct xt_mtchk_param *par)
+static int ipv6header_mt6_check(const struct xt_mtchk_param *par)
 {
         const struct ip6t_ipv6header_info *info = par->matchinfo;
 
diff --git a/net/ipv6/netfilter/ip6t_mh.c b/net/ipv6/netfilter/ip6t_mh.c
index 0181eb81d24b..d9408045994c 100644
--- a/net/ipv6/netfilter/ip6t_mh.c
+++ b/net/ipv6/netfilter/ip6t_mh.c
@@ -62,7 +62,7 @@ static bool mh_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
                           !!(mhinfo->invflags & IP6T_MH_INV_TYPE));
 }
 
-static bool mh_mt6_check(const struct xt_mtchk_param *par)
+static int mh_mt6_check(const struct xt_mtchk_param *par)
 {
         const struct ip6t_mh *mhinfo = par->matchinfo;
 
diff --git a/net/ipv6/netfilter/ip6t_rt.c b/net/ipv6/netfilter/ip6t_rt.c
index c58d65336577..76397f35eafd 100644
--- a/net/ipv6/netfilter/ip6t_rt.c
+++ b/net/ipv6/netfilter/ip6t_rt.c
@@ -183,7 +183,7 @@ static bool rt_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
         return false;
 }
 
-static bool rt_mt6_check(const struct xt_mtchk_param *par)
+static int rt_mt6_check(const struct xt_mtchk_param *par)
 {
         const struct ip6t_rt *rtinfo = par->matchinfo;
 
diff --git a/net/netfilter/xt_cluster.c b/net/netfilter/xt_cluster.c
index 4c273e871301..1f2c35ef1427 100644
--- a/net/netfilter/xt_cluster.c
+++ b/net/netfilter/xt_cluster.c
@@ -132,7 +132,7 @@ xt_cluster_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                !!(info->flags & XT_CLUSTER_F_INV);
 }
 
-static bool xt_cluster_mt_checkentry(const struct xt_mtchk_param *par)
+static int xt_cluster_mt_checkentry(const struct xt_mtchk_param *par)
 {
         struct xt_cluster_match_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_connbytes.c b/net/netfilter/xt_connbytes.c
index edb7bbd9ae54..136ef4ccdacb 100644
--- a/net/netfilter/xt_connbytes.c
+++ b/net/netfilter/xt_connbytes.c
@@ -93,7 +93,7 @@ connbytes_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                 return what >= sinfo->count.from;
 }
 
-static bool connbytes_mt_check(const struct xt_mtchk_param *par)
+static int connbytes_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_connbytes_info *sinfo = par->matchinfo;
 
diff --git a/net/netfilter/xt_connlimit.c b/net/netfilter/xt_connlimit.c
index d5b26dab9e26..a9fec38ab029 100644
--- a/net/netfilter/xt_connlimit.c
+++ b/net/netfilter/xt_connlimit.c
@@ -216,7 +216,7 @@ connlimit_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return false;
 }
 
-static bool connlimit_mt_check(const struct xt_mtchk_param *par)
+static int connlimit_mt_check(const struct xt_mtchk_param *par)
 {
         struct xt_connlimit_info *info = par->matchinfo;
         unsigned int i;
diff --git a/net/netfilter/xt_connmark.c b/net/netfilter/xt_connmark.c
index 7a51ba63f545..df7eaff874f1 100644
--- a/net/netfilter/xt_connmark.c
+++ b/net/netfilter/xt_connmark.c
@@ -103,7 +103,7 @@ connmark_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return ((ct->mark & info->mask) == info->mark) ^ info->invert;
 }
 
-static bool connmark_mt_check(const struct xt_mtchk_param *par)
+static int connmark_mt_check(const struct xt_mtchk_param *par)
 {
         if (nf_ct_l3proto_try_module_get(par->family) < 0) {
                 pr_info("cannot load conntrack support for proto=%u\n",
diff --git a/net/netfilter/xt_conntrack.c b/net/netfilter/xt_conntrack.c
index 387172b6b0d8..500e0338a187 100644
--- a/net/netfilter/xt_conntrack.c
+++ b/net/netfilter/xt_conntrack.c
@@ -206,7 +206,7 @@ conntrack_mt_v2(const struct sk_buff *skb, const struct xt_match_param *par)
         return conntrack_mt(skb, par, info->state_mask, info->status_mask);
 }
 
-static bool conntrack_mt_check(const struct xt_mtchk_param *par)
+static int conntrack_mt_check(const struct xt_mtchk_param *par)
 {
         if (nf_ct_l3proto_try_module_get(par->family) < 0) {
                 pr_info("cannot load conntrack support for proto=%u\n",
diff --git a/net/netfilter/xt_dccp.c b/net/netfilter/xt_dccp.c
index 8f6014f7c881..da8c301d24ea 100644
--- a/net/netfilter/xt_dccp.c
+++ b/net/netfilter/xt_dccp.c
@@ -123,7 +123,7 @@ dccp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                            XT_DCCP_OPTION, info->flags, info->invflags);
 }
 
-static bool dccp_mt_check(const struct xt_mtchk_param *par)
+static int dccp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_dccp_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_dscp.c b/net/netfilter/xt_dscp.c
index 6ecedc13db0c..295da4ce822c 100644
--- a/net/netfilter/xt_dscp.c
+++ b/net/netfilter/xt_dscp.c
@@ -42,7 +42,7 @@ dscp_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
         return (dscp == info->dscp) ^ !!info->invert;
 }
 
-static bool dscp_mt_check(const struct xt_mtchk_param *par)
+static int dscp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_dscp_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_esp.c b/net/netfilter/xt_esp.c
index 1a446d626769..9f5da9795674 100644
--- a/net/netfilter/xt_esp.c
+++ b/net/netfilter/xt_esp.c
@@ -60,7 +60,7 @@ static bool esp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                          !!(espinfo->invflags & XT_ESP_INV_SPI));
 }
 
-static bool esp_mt_check(const struct xt_mtchk_param *par)
+static int esp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_esp *espinfo = par->matchinfo;
 
diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c
index 8f3e0c02ca54..d13800c95930 100644
--- a/net/netfilter/xt_hashlimit.c
+++ b/net/netfilter/xt_hashlimit.c
@@ -671,7 +671,7 @@ hashlimit_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return false;
 }
 
-static bool hashlimit_mt_check_v0(const struct xt_mtchk_param *par)
+static int hashlimit_mt_check_v0(const struct xt_mtchk_param *par)
 {
         struct net *net = par->net;
         struct xt_hashlimit_info *r = par->matchinfo;
@@ -707,7 +707,7 @@ static bool hashlimit_mt_check_v0(const struct xt_mtchk_param *par)
         return true;
 }
 
-static bool hashlimit_mt_check(const struct xt_mtchk_param *par)
+static int hashlimit_mt_check(const struct xt_mtchk_param *par)
 {
         struct net *net = par->net;
         struct xt_hashlimit_mtinfo1 *info = par->matchinfo;
diff --git a/net/netfilter/xt_helper.c b/net/netfilter/xt_helper.c
index 482aff2ccf7c..6e177b279f90 100644
--- a/net/netfilter/xt_helper.c
+++ b/net/netfilter/xt_helper.c
@@ -54,7 +54,7 @@ helper_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return ret;
 }
 
-static bool helper_mt_check(const struct xt_mtchk_param *par)
+static int helper_mt_check(const struct xt_mtchk_param *par)
 {
         struct xt_helper_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_limit.c b/net/netfilter/xt_limit.c
index b3dfca63fa52..138a324df8df 100644
--- a/net/netfilter/xt_limit.c
+++ b/net/netfilter/xt_limit.c
@@ -97,7 +97,7 @@ user2credits(u_int32_t user)
         return (user * HZ * CREDITS_PER_JIFFY) / XT_LIMIT_SCALE;
 }
 
-static bool limit_mt_check(const struct xt_mtchk_param *par)
+static int limit_mt_check(const struct xt_mtchk_param *par)
 {
         struct xt_rateinfo *r = par->matchinfo;
         struct xt_limit_priv *priv;
diff --git a/net/netfilter/xt_multiport.c b/net/netfilter/xt_multiport.c
index 4fa90c86fdb5..b446738eab1a 100644
--- a/net/netfilter/xt_multiport.c
+++ b/net/netfilter/xt_multiport.c
@@ -152,7 +152,7 @@ check(u_int16_t proto,
                 && count <= XT_MULTI_PORTS;
 }
 
-static bool multiport_mt_check_v0(const struct xt_mtchk_param *par)
+static int multiport_mt_check_v0(const struct xt_mtchk_param *par)
 {
         const struct ipt_ip *ip = par->entryinfo;
         const struct xt_multiport *multiinfo = par->matchinfo;
@@ -161,7 +161,7 @@ static bool multiport_mt_check_v0(const struct xt_mtchk_param *par)
                      multiinfo->count);
 }
 
-static bool multiport_mt_check(const struct xt_mtchk_param *par)
+static int multiport_mt_check(const struct xt_mtchk_param *par)
 {
         const struct ipt_ip *ip = par->entryinfo;
         const struct xt_multiport_v1 *multiinfo = par->matchinfo;
@@ -170,7 +170,7 @@ static bool multiport_mt_check(const struct xt_mtchk_param *par)
                      multiinfo->count);
 }
 
-static bool multiport_mt6_check_v0(const struct xt_mtchk_param *par)
+static int multiport_mt6_check_v0(const struct xt_mtchk_param *par)
 {
         const struct ip6t_ip6 *ip = par->entryinfo;
         const struct xt_multiport *multiinfo = par->matchinfo;
@@ -179,7 +179,7 @@ static bool multiport_mt6_check_v0(const struct xt_mtchk_param *par)
                      multiinfo->count);
 }
 
-static bool multiport_mt6_check(const struct xt_mtchk_param *par)
+static int multiport_mt6_check(const struct xt_mtchk_param *par)
 {
         const struct ip6t_ip6 *ip = par->entryinfo;
         const struct xt_multiport_v1 *multiinfo = par->matchinfo;
diff --git a/net/netfilter/xt_physdev.c b/net/netfilter/xt_physdev.c
index 3d42a278408f..850e412c83ef 100644
--- a/net/netfilter/xt_physdev.c
+++ b/net/netfilter/xt_physdev.c
@@ -83,7 +83,7 @@ match_outdev:
         return (!!ret ^ !(info->invert & XT_PHYSDEV_OP_OUT));
 }
 
-static bool physdev_mt_check(const struct xt_mtchk_param *par)
+static int physdev_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_physdev_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_policy.c b/net/netfilter/xt_policy.c
index de3aded6afb8..c9965b640b16 100644
--- a/net/netfilter/xt_policy.c
+++ b/net/netfilter/xt_policy.c
@@ -128,7 +128,7 @@ policy_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return ret;
 }
 
-static bool policy_mt_check(const struct xt_mtchk_param *par)
+static int policy_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_policy_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_quota.c b/net/netfilter/xt_quota.c
index 390b7d09fe51..2861fac5f2e1 100644
--- a/net/netfilter/xt_quota.c
+++ b/net/netfilter/xt_quota.c
@@ -43,7 +43,7 @@ quota_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return ret;
 }
 
-static bool quota_mt_check(const struct xt_mtchk_param *par)
+static int quota_mt_check(const struct xt_mtchk_param *par)
 {
         struct xt_quota_info *q = par->matchinfo;
 
diff --git a/net/netfilter/xt_rateest.c b/net/netfilter/xt_rateest.c
index 4fc6a917f6de..3b5e3d613b18 100644
--- a/net/netfilter/xt_rateest.c
+++ b/net/netfilter/xt_rateest.c
@@ -74,7 +74,7 @@ xt_rateest_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return ret;
 }
 
-static bool xt_rateest_mt_checkentry(const struct xt_mtchk_param *par)
+static int xt_rateest_mt_checkentry(const struct xt_mtchk_param *par)
 {
         struct xt_rateest_match_info *info = par->matchinfo;
         struct xt_rateest *est1, *est2;
diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c
index 85309448c5e7..52042c8bf7f2 100644
--- a/net/netfilter/xt_recent.c
+++ b/net/netfilter/xt_recent.c
@@ -305,7 +305,7 @@ out:
         return ret;
 }
 
-static bool recent_mt_check(const struct xt_mtchk_param *par)
+static int recent_mt_check(const struct xt_mtchk_param *par)
 {
         struct recent_net *recent_net = recent_pernet(par->net);
         const struct xt_recent_mtinfo *info = par->matchinfo;
diff --git a/net/netfilter/xt_sctp.c b/net/netfilter/xt_sctp.c
index 977b182dea59..5037a7a0059c 100644
--- a/net/netfilter/xt_sctp.c
+++ b/net/netfilter/xt_sctp.c
@@ -144,7 +144,7 @@ sctp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                            XT_SCTP_CHUNK_TYPES, info->flags, info->invflags);
 }
 
-static bool sctp_mt_check(const struct xt_mtchk_param *par)
+static int sctp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_sctp_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_state.c b/net/netfilter/xt_state.c
index 94893be80276..8b15b1317f1f 100644
--- a/net/netfilter/xt_state.c
+++ b/net/netfilter/xt_state.c
@@ -37,7 +37,7 @@ state_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return (sinfo->statemask & statebit);
 }
 
-static bool state_mt_check(const struct xt_mtchk_param *par)
+static int state_mt_check(const struct xt_mtchk_param *par)
 {
         if (nf_ct_l3proto_try_module_get(par->family) < 0) {
                 pr_info("cannot load conntrack support for proto=%u\n",
diff --git a/net/netfilter/xt_statistic.c b/net/netfilter/xt_statistic.c
index 51ac1bbb4f52..a577ab008f57 100644
--- a/net/netfilter/xt_statistic.c
+++ b/net/netfilter/xt_statistic.c
@@ -52,7 +52,7 @@ statistic_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return ret;
 }
 
-static bool statistic_mt_check(const struct xt_mtchk_param *par)
+static int statistic_mt_check(const struct xt_mtchk_param *par)
 {
         struct xt_statistic_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_string.c b/net/netfilter/xt_string.c
index b4d774111311..7d1412154e27 100644
--- a/net/netfilter/xt_string.c
+++ b/net/netfilter/xt_string.c
@@ -40,7 +40,7 @@ string_mt(const struct sk_buff *skb, const struct xt_match_param *par)
 
 #define STRING_TEXT_PRIV(m) ((struct xt_string_info *)(m))
 
-static bool string_mt_check(const struct xt_mtchk_param *par)
+static int string_mt_check(const struct xt_mtchk_param *par)
 {
         struct xt_string_info *conf = par->matchinfo;
         struct ts_config *ts_conf;
diff --git a/net/netfilter/xt_tcpudp.c b/net/netfilter/xt_tcpudp.c
index b53887f83c44..00728410099f 100644
--- a/net/netfilter/xt_tcpudp.c
+++ b/net/netfilter/xt_tcpudp.c
@@ -120,7 +120,7 @@ static bool tcp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return true;
 }
 
-static bool tcp_mt_check(const struct xt_mtchk_param *par)
+static int tcp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_tcp *tcpinfo = par->matchinfo;
 
@@ -155,7 +155,7 @@ static bool udp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                               !!(udpinfo->invflags & XT_UDP_INV_DSTPT));
 }
 
-static bool udp_mt_check(const struct xt_mtchk_param *par)
+static int udp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_udp *udpinfo = par->matchinfo;
 
diff --git a/net/netfilter/xt_time.c b/net/netfilter/xt_time.c
index 45ed05b5161f..db74f4fd57df 100644
--- a/net/netfilter/xt_time.c
+++ b/net/netfilter/xt_time.c
@@ -217,7 +217,7 @@ time_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return true;
 }
 
-static bool time_mt_check(const struct xt_mtchk_param *par)
+static int time_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_time_info *info = par->matchinfo;