Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) New sysctl ndisc_notify needs some documentation, from Hanns
    Frederic Sowa.

 2) Netfilter REJECT target doesn't set transport header of SKB
    correctly, from Mukund Jampala.

 3) Forcedeth driver needs to check for DMA mapping failures, from Larry
    Finger.

 4) brcmsmac driver can't use usleep_range while holding locks, use
    udelay instead.  From Niels Ole Salscheider.

 5) Fix unregister of netlink bridge multicast database handlers, from
    Vlad Yasevich and Rami Rosen.

 6) Fix checksum calculations in netfilter's ipv6 network prefix
    translation module.

 7) Fix high order page allocation failures in netfilter xt_recent, from
    Eric Dumazet.

 8) mac802154 needs to use netif_rx_ni() instead of netif_rx() because
    mac802154_process_data() can execute in process rather than
    interrupt context.  From Alexander Aring.

 9) Fix splice handling of MSG_SENDPAGE_NOTLAST, otherwise we elide one
    tcp_push() too many.  From Eric Dumazet and Willy Tarreau.

10) Fix skb->truesize tracking in XEN netfront driver, from Ian
    Campbell.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (46 commits)
  xen/netfront: improve truesize tracking
  ipv4: fix NULL checking in devinet_ioctl()
  tcp: fix MSG_SENDPAGE_NOTLAST logic
  net/ipv4/ipconfig: really display the BOOTP/DHCP server's address.
  ip-sysctl: fix spelling errors
  mac802154: fix NOHZ local_softirq_pending 08 warning
  ipv6: document ndisc_notify in networking/ip-sysctl.txt
  ath9k: Fix Kconfig for ATH9K_HTC
  netfilter: xt_recent: avoid high order page allocations
  netfilter: fix missing dependencies for the NOTRACK target
  netfilter: ip6t_NPT: fix IPv6 NTP checksum calculation
  bridge: add empty br_mdb_init() and br_mdb_uninit() definitions.
  vxlan: allow live mac address change
  bridge: Correctly unregister MDB rtnetlink handlers
  brcmfmac: fix parsing rsn ie for ap mode.
  brcmsmac: add copyright information for Canonical
  rtlwifi: rtl8723ae: Fix warning for unchecked pci_map_single() call
  rtlwifi: rtl8192se: Fix warning for unchecked pci_map_single() call
  rtlwifi: rtl8192de: Fix warning for unchecked pci_map_single() call
  rtlwifi: rtl8192ce: Fix warning for unchecked pci_map_single() call
  ...

20 files changed, 221 insertions, 68 deletions

diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 5391ca43336a..6d6f26531de2 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -1608,7 +1608,6 @@ void br_multicast_init(struct net_bridge *br)
                     br_multicast_querier_expired, (unsigned long)br);
         setup_timer(&br->multicast_query_timer, br_multicast_query_expired,
                     (unsigned long)br);
-        br_mdb_init();
 }
 
 void br_multicast_open(struct net_bridge *br)
@@ -1633,7 +1632,6 @@ void br_multicast_stop(struct net_bridge *br)
         del_timer_sync(&br->multicast_querier_timer);
         del_timer_sync(&br->multicast_query_timer);
 
-        br_mdb_uninit();
         spin_lock_bh(&br->multicast_lock);
         mdb = mlock_dereference(br->mdb, br);
         if (!mdb)
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 97ba0189c6f7..5dc66abcc9e2 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -299,10 +299,21 @@ struct rtnl_link_ops br_link_ops __read_mostly = {
 
 int __init br_netlink_init(void)
 {
-        return rtnl_link_register(&br_link_ops);
+        int err;
+
+        br_mdb_init();
+        err = rtnl_link_register(&br_link_ops);
+        if (err)
+                goto out;
+
+        return 0;
+out:
+        br_mdb_uninit();
+        return err;
 }
 
 void __exit br_netlink_fini(void)
 {
+        br_mdb_uninit();
         rtnl_link_unregister(&br_link_ops);
 }
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 8d83be5ffedc..711094aed41a 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -526,6 +526,12 @@ static inline bool br_multicast_is_router(struct net_bridge *br)
 {
         return 0;
 }
+static inline void br_mdb_init(void)
+{
+}
+static inline void br_mdb_uninit(void)
+{
+}
 #endif
 
 /* br_netfilter.c */
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index cc06a47f1216..a8e4f2665d5e 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -823,9 +823,9 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
                 if (!ifa) {
                         ret = -ENOBUFS;
                         ifa = inet_alloc_ifa();
-                        INIT_HLIST_NODE(&ifa->hash);
                         if (!ifa)
                                 break;
+                        INIT_HLIST_NODE(&ifa->hash);
                         if (colon)
                                 memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ);
                         else
diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
index d763701cff1b..a2e50ae80b53 100644
--- a/net/ipv4/ipconfig.c
+++ b/net/ipv4/ipconfig.c
@@ -136,6 +136,8 @@ __be32 ic_myaddr = NONE;		/* My IP address */
 static __be32 ic_netmask = NONE;        /* Netmask for local subnet */
 __be32 ic_gateway = NONE;       /* Gateway IP address */
 
+__be32 ic_addrservaddr = NONE;  /* IP Address of the IP addresses'server */
+
 __be32 ic_servaddr = NONE;      /* Boot server IP address */
 
 __be32 root_server_addr = NONE; /* Address of NFS server */
@@ -558,6 +560,7 @@ ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
         if (ic_myaddr == NONE)
                 ic_myaddr = tip;
         ic_servaddr = sip;
+        ic_addrservaddr = sip;
         ic_got_reply = IC_RARP;
 
 drop_unlock:
@@ -1068,7 +1071,7 @@ static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, str
                                 ic_servaddr = server_id;
 #ifdef IPCONFIG_DEBUG
                                 printk("DHCP: Offered address %pI4 by server %pI4\n",
-                                       &ic_myaddr, &ic_servaddr);
+                                       &ic_myaddr, &b->iph.saddr);
 #endif
                                 /* The DHCP indicated server address takes
                                  * precedence over the bootp header one if
@@ -1113,6 +1116,7 @@ static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, str
         ic_dev = dev;
         ic_myaddr = b->your_ip;
         ic_servaddr = b->server_ip;
+        ic_addrservaddr = b->iph.saddr;
         if (ic_gateway == NONE && b->relay_ip)
                 ic_gateway = b->relay_ip;
         if (ic_nameservers[0] == NONE)
@@ -1268,7 +1272,7 @@ static int __init ic_dynamic(void)
         printk("IP-Config: Got %s answer from %pI4, ",
                 ((ic_got_reply & IC_RARP) ? "RARP"
                  : (ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP"),
-               &ic_servaddr);
+               &ic_addrservaddr);
         pr_cont("my address is %pI4\n", &ic_myaddr);
 
         return 0;
diff --git a/net/ipv4/netfilter/ipt_REJECT.c b/net/ipv4/netfilter/ipt_REJECT.c
index 51f13f8ec724..04b18c1ac345 100644
--- a/net/ipv4/netfilter/ipt_REJECT.c
+++ b/net/ipv4/netfilter/ipt_REJECT.c
@@ -81,6 +81,7 @@ static void send_reset(struct sk_buff *oldskb, int hook)
         niph->saddr     = oiph->daddr;
         niph->daddr     = oiph->saddr;
 
+        skb_reset_transport_header(nskb);
         tcph = (struct tcphdr *)skb_put(nskb, sizeof(struct tcphdr));
         memset(tcph, 0, sizeof(*tcph));
         tcph->source    = oth->dest;
diff --git a/net/ipv4/netfilter/iptable_nat.c b/net/ipv4/netfilter/iptable_nat.c
index da2c8a368f68..eeaff7e4acb5 100644
--- a/net/ipv4/netfilter/iptable_nat.c
+++ b/net/ipv4/netfilter/iptable_nat.c
@@ -124,23 +124,28 @@ nf_nat_ipv4_fn(unsigned int hooknum,
                         ret = nf_nat_rule_find(skb, hooknum, in, out, ct);
                         if (ret != NF_ACCEPT)
                                 return ret;
-                } else
+                } else {
                         pr_debug("Already setup manip %s for ct %p\n",
                                  maniptype == NF_NAT_MANIP_SRC ? "SRC" : "DST",
                                  ct);
+                        if (nf_nat_oif_changed(hooknum, ctinfo, nat, out))
+                                goto oif_changed;
+                }
                 break;
 
         default:
                 /* ESTABLISHED */
                 NF_CT_ASSERT(ctinfo == IP_CT_ESTABLISHED ||
                              ctinfo == IP_CT_ESTABLISHED_REPLY);
-                if (nf_nat_oif_changed(hooknum, ctinfo, nat, out)) {
-                        nf_ct_kill_acct(ct, ctinfo, skb);
-                        return NF_DROP;
-                }
+                if (nf_nat_oif_changed(hooknum, ctinfo, nat, out))
+                        goto oif_changed;
         }
 
         return nf_nat_packet(ct, ctinfo, hooknum, skb);
+
+oif_changed:
+        nf_ct_kill_acct(ct, ctinfo, skb);
+        return NF_DROP;
 }
 
 static unsigned int
diff --git a/net/ipv6/netfilter/ip6t_NPT.c b/net/ipv6/netfilter/ip6t_NPT.c
index e9486915eff6..7302b0b7b642 100644
--- a/net/ipv6/netfilter/ip6t_NPT.c
+++ b/net/ipv6/netfilter/ip6t_NPT.c
@@ -14,42 +14,23 @@
 #include <linux/netfilter_ipv6/ip6t_NPT.h>
 #include <linux/netfilter/x_tables.h>
 
-static __sum16 csum16_complement(__sum16 a)
-{
-        return (__force __sum16)(0xffff - (__force u16)a);
-}
-
-static __sum16 csum16_add(__sum16 a, __sum16 b)
-{
-        u16 sum;
-
-        sum = (__force u16)a + (__force u16)b;
-        sum += (__force u16)a < (__force u16)b;
-        return (__force __sum16)sum;
-}
-
-static __sum16 csum16_sub(__sum16 a, __sum16 b)
-{
-        return csum16_add(a, csum16_complement(b));
-}
-
 static int ip6t_npt_checkentry(const struct xt_tgchk_param *par)
 {
         struct ip6t_npt_tginfo *npt = par->targinfo;
-        __sum16 src_sum = 0, dst_sum = 0;
+        __wsum src_sum = 0, dst_sum = 0;
         unsigned int i;
 
         if (npt->src_pfx_len > 64 || npt->dst_pfx_len > 64)
                 return -EINVAL;
 
         for (i = 0; i < ARRAY_SIZE(npt->src_pfx.in6.s6_addr16); i++) {
-                src_sum = csum16_add(src_sum,
-                                (__force __sum16)npt->src_pfx.in6.s6_addr16[i]);
-                dst_sum = csum16_add(dst_sum,
-                                (__force __sum16)npt->dst_pfx.in6.s6_addr16[i]);
+                src_sum = csum_add(src_sum,
+                                (__force __wsum)npt->src_pfx.in6.s6_addr16[i]);
+                dst_sum = csum_add(dst_sum,
+                                (__force __wsum)npt->dst_pfx.in6.s6_addr16[i]);
         }
 
-        npt->adjustment = csum16_sub(src_sum, dst_sum);
+        npt->adjustment = (__force __sum16) csum_sub(src_sum, dst_sum);
         return 0;
 }
 
@@ -85,7 +66,7 @@ static bool ip6t_npt_map_pfx(const struct ip6t_npt_tginfo *npt,
                         return false;
         }
 
-        sum = csum16_add((__force __sum16)addr->s6_addr16[idx],
+        sum = (__force __sum16) csum_add((__force __wsum)addr->s6_addr16[idx],
                          npt->adjustment);
         if (sum == CSUM_MANGLED_0)
                 sum = 0;
diff --git a/net/ipv6/netfilter/ip6t_REJECT.c b/net/ipv6/netfilter/ip6t_REJECT.c
index fd4fb34c51c7..029623dbd411 100644
--- a/net/ipv6/netfilter/ip6t_REJECT.c
+++ b/net/ipv6/netfilter/ip6t_REJECT.c
@@ -132,6 +132,7 @@ static void send_reset(struct net *net, struct sk_buff *oldskb)
         ip6h->saddr = oip6h->daddr;
         ip6h->daddr = oip6h->saddr;
 
+        skb_reset_transport_header(nskb);
         tcph = (struct tcphdr *)skb_put(nskb, sizeof(struct tcphdr));
         /* Truncate to length (no data) */
         tcph->doff = sizeof(struct tcphdr)/4;
diff --git a/net/ipv6/netfilter/ip6table_nat.c b/net/ipv6/netfilter/ip6table_nat.c
index 6c8ae24b85eb..e0e788d25b14 100644
--- a/net/ipv6/netfilter/ip6table_nat.c
+++ b/net/ipv6/netfilter/ip6table_nat.c
@@ -127,23 +127,28 @@ nf_nat_ipv6_fn(unsigned int hooknum,
                         ret = nf_nat_rule_find(skb, hooknum, in, out, ct);
                         if (ret != NF_ACCEPT)
                                 return ret;
-                } else
+                } else {
                         pr_debug("Already setup manip %s for ct %p\n",
                                  maniptype == NF_NAT_MANIP_SRC ? "SRC" : "DST",
                                  ct);
+                        if (nf_nat_oif_changed(hooknum, ctinfo, nat, out))
+                                goto oif_changed;
+                }
                 break;
 
         default:
                 /* ESTABLISHED */
                 NF_CT_ASSERT(ctinfo == IP_CT_ESTABLISHED ||
                              ctinfo == IP_CT_ESTABLISHED_REPLY);
-                if (nf_nat_oif_changed(hooknum, ctinfo, nat, out)) {
-                        nf_ct_kill_acct(ct, ctinfo, skb);
-                        return NF_DROP;
-                }
+                if (nf_nat_oif_changed(hooknum, ctinfo, nat, out))
+                        goto oif_changed;
         }
 
         return nf_nat_packet(ct, ctinfo, hooknum, skb);
+
+oif_changed:
+        nf_ct_kill_acct(ct, ctinfo, skb);
+        return NF_DROP;
 }
 
 static unsigned int
diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
index 00ee17c3e893..137e245860ab 100644
--- a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
@@ -81,8 +81,8 @@ static int ipv6_get_l4proto(const struct sk_buff *skb, unsigned int nhoff,
         }
         protoff = ipv6_skip_exthdr(skb, extoff, &nexthdr, &frag_off);
         /*
-         * (protoff == skb->len) mean that the packet doesn't have no data
-         * except of IPv6 & ext headers. but it's tracked anyway. - YK
+         * (protoff == skb->len) means the packet has not data, just
+         * IPv6 and possibly extensions headers, but it is tracked anyway
          */
         if (protoff < 0 || (frag_off & htons(~0x7)) != 0) {
                 pr_debug("ip6_conntrack_core: can't find proto in pkt\n");
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 22c8ea951185..3dacecc99065 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -311,7 +311,10 @@ found:
         else
                 fq->q.fragments = skb;
 
-        skb->dev = NULL;
+        if (skb->dev) {
+                fq->iif = skb->dev->ifindex;
+                skb->dev = NULL;
+        }
         fq->q.stamp = skb->tstamp;
         fq->q.meat += skb->len;
         if (payload_len > fq->q.max_size)
diff --git a/net/mac802154/wpan.c b/net/mac802154/wpan.c
index 1191039c2b1b..199b92261e94 100644
--- a/net/mac802154/wpan.c
+++ b/net/mac802154/wpan.c
@@ -389,7 +389,7 @@ void mac802154_wpan_setup(struct net_device *dev)
 
 static int mac802154_process_data(struct net_device *dev, struct sk_buff *skb)
 {
-        return netif_rx(skb);
+        return netif_rx_ni(skb);
 }
 
 static int
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index fefa514b9917..49e96df5fbc4 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -680,6 +680,13 @@ config NETFILTER_XT_TARGET_NFQUEUE
 
           To compile it as a module, choose M here.  If unsure, say N.
 
+config NETFILTER_XT_TARGET_NOTRACK
+        tristate  '"NOTRACK" target support (DEPRECATED)'
+        depends on NF_CONNTRACK
+        depends on IP_NF_RAW || IP6_NF_RAW
+        depends on NETFILTER_ADVANCED
+        select NETFILTER_XT_TARGET_CT
+
 config NETFILTER_XT_TARGET_RATEEST
         tristate '"RATEEST" target support'
         depends on NETFILTER_ADVANCED
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 08cdc71d8e87..016d95ead930 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -1526,6 +1526,7 @@ err_extend:
  */
 #define UNCONFIRMED_NULLS_VAL   ((1<<30)+0)
 #define DYING_NULLS_VAL         ((1<<30)+1)
+#define TEMPLATE_NULLS_VAL      ((1<<30)+2)
 
 static int nf_conntrack_init_net(struct net *net)
 {
@@ -1534,6 +1535,7 @@ static int nf_conntrack_init_net(struct net *net)
         atomic_set(&net->ct.count, 0);
         INIT_HLIST_NULLS_HEAD(&net->ct.unconfirmed, UNCONFIRMED_NULLS_VAL);
         INIT_HLIST_NULLS_HEAD(&net->ct.dying, DYING_NULLS_VAL);
+        INIT_HLIST_NULLS_HEAD(&net->ct.tmpl, TEMPLATE_NULLS_VAL);
         net->ct.stat = alloc_percpu(struct ip_conntrack_stat);
         if (!net->ct.stat) {
                 ret = -ENOMEM;
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 4e078cd84d83..627b0e50b238 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -2624,7 +2624,7 @@ ctnetlink_create_expect(struct net *net, u16 zone,
         if (!help) {
                 if (!cda[CTA_EXPECT_TIMEOUT]) {
                         err = -EINVAL;
-                        goto out;
+                        goto err_out;
                 }
                 exp->timeout.expires =
                   jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index 9f199f2e31fa..92fd8eca0d31 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -13,6 +13,7 @@
  */
 #include <linux/module.h>
 #include <linux/skbuff.h>
+#include <linux/if_arp.h>
 #include <linux/init.h>
 #include <linux/ip.h>
 #include <linux/ipv6.h>
@@ -384,6 +385,7 @@ __build_packet_message(struct nfulnl_instance *inst,
         struct nfgenmsg *nfmsg;
         sk_buff_data_t old_tail = inst->skb->tail;
         struct sock *sk;
+        const unsigned char *hwhdrp;
 
         nlh = nlmsg_put(inst->skb, 0, 0,
                         NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET,
@@ -485,9 +487,17 @@ __build_packet_message(struct nfulnl_instance *inst,
         if (indev && skb_mac_header_was_set(skb)) {
                 if (nla_put_be16(inst->skb, NFULA_HWTYPE, htons(skb->dev->type)) ||
                     nla_put_be16(inst->skb, NFULA_HWLEN,
-                                 htons(skb->dev->hard_header_len)) ||
-                    nla_put(inst->skb, NFULA_HWHEADER, skb->dev->hard_header_len,
-                            skb_mac_header(skb)))
+                                 htons(skb->dev->hard_header_len)))
+                        goto nla_put_failure;
+
+                hwhdrp = skb_mac_header(skb);
+
+                if (skb->dev->type == ARPHRD_SIT)
+                        hwhdrp -= ETH_HLEN;
+
+                if (hwhdrp >= skb->head &&
+                    nla_put(inst->skb, NFULA_HWHEADER,
+                            skb->dev->hard_header_len, hwhdrp))
                         goto nla_put_failure;
         }
 
diff --git a/net/netfilter/xt_CT.c b/net/netfilter/xt_CT.c
index ae7f5daeee43..2a0843081840 100644
--- a/net/netfilter/xt_CT.c
+++ b/net/netfilter/xt_CT.c
@@ -149,6 +149,10 @@ static int xt_ct_tg_check_v0(const struct xt_tgchk_param *par)
 
         __set_bit(IPS_TEMPLATE_BIT, &ct->status);
         __set_bit(IPS_CONFIRMED_BIT, &ct->status);
+
+        /* Overload tuple linked list to put us in template list. */
+        hlist_nulls_add_head_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode,
+                                 &par->net->ct.tmpl);
 out:
         info->ct = ct;
         return 0;
@@ -289,6 +293,10 @@ static int xt_ct_tg_check_v1(const struct xt_tgchk_param *par)
 
         __set_bit(IPS_TEMPLATE_BIT, &ct->status);
         __set_bit(IPS_CONFIRMED_BIT, &ct->status);
+
+        /* Overload tuple linked list to put us in template list. */
+        hlist_nulls_add_head_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode,
+                                 &par->net->ct.tmpl);
 out:
         info->ct = ct;
         return 0;
@@ -377,14 +385,60 @@ static struct xt_target xt_ct_tg_reg[] __read_mostly = {
         },
 };
 
+static unsigned int
+notrack_tg(struct sk_buff *skb, const struct xt_action_param *par)
+{
+        /* Previously seen (loopback)? Ignore. */
+        if (skb->nfct != NULL)
+                return XT_CONTINUE;
+
+        skb->nfct = &nf_ct_untracked_get()->ct_general;
+        skb->nfctinfo = IP_CT_NEW;
+        nf_conntrack_get(skb->nfct);
+
+        return XT_CONTINUE;
+}
+
+static int notrack_chk(const struct xt_tgchk_param *par)
+{
+        if (!par->net->xt.notrack_deprecated_warning) {
+                pr_info("netfilter: NOTRACK target is deprecated, "
+                        "use CT instead or upgrade iptables\n");
+                par->net->xt.notrack_deprecated_warning = true;
+        }
+        return 0;
+}
+
+static struct xt_target notrack_tg_reg __read_mostly = {
+        .name           = "NOTRACK",
+        .revision       = 0,
+        .family         = NFPROTO_UNSPEC,
+        .checkentry     = notrack_chk,
+        .target         = notrack_tg,
+        .table          = "raw",
+        .me             = THIS_MODULE,
+};
+
 static int __init xt_ct_tg_init(void)
 {
-        return xt_register_targets(xt_ct_tg_reg, ARRAY_SIZE(xt_ct_tg_reg));
+        int ret;
+
+        ret = xt_register_target(&notrack_tg_reg);
+        if (ret < 0)
+                return ret;
+
+        ret = xt_register_targets(xt_ct_tg_reg, ARRAY_SIZE(xt_ct_tg_reg));
+        if (ret < 0) {
+                xt_unregister_target(&notrack_tg_reg);
+                return ret;
+        }
+        return 0;
 }
 
 static void __exit xt_ct_tg_exit(void)
 {
         xt_unregister_targets(xt_ct_tg_reg, ARRAY_SIZE(xt_ct_tg_reg));
+        xt_unregister_target(&notrack_tg_reg);
 }
 
 module_init(xt_ct_tg_init);
@@ -394,3 +448,5 @@ MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Xtables: connection tracking target");
 MODULE_ALIAS("ipt_CT");
 MODULE_ALIAS("ip6t_CT");
+MODULE_ALIAS("ipt_NOTRACK");
+MODULE_ALIAS("ip6t_NOTRACK");
diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c
index 26a668a84aa2..a9d7af953ceb 100644
--- a/net/netfilter/xt_hashlimit.c
+++ b/net/netfilter/xt_hashlimit.c
@@ -157,11 +157,22 @@ dsthash_find(const struct xt_hashlimit_htable *ht,
 /* allocate dsthash_ent, initialize dst, put in htable and lock it */
 static struct dsthash_ent *
 dsthash_alloc_init(struct xt_hashlimit_htable *ht,
-                   const struct dsthash_dst *dst)
+                   const struct dsthash_dst *dst, bool *race)
 {
         struct dsthash_ent *ent;
 
         spin_lock(&ht->lock);
+
+        /* Two or more packets may race to create the same entry in the
+         * hashtable, double check if this packet lost race.
+         */
+        ent = dsthash_find(ht, dst);
+        if (ent != NULL) {
+                spin_unlock(&ht->lock);
+                *race = true;
+                return ent;
+        }
+
         /* initialize hash with random val at the time we allocate
          * the first hashtable entry */
         if (unlikely(!ht->rnd_initialized)) {
@@ -318,7 +329,10 @@ static void htable_destroy(struct xt_hashlimit_htable *hinfo)
                 parent = hashlimit_net->ipt_hashlimit;
         else
                 parent = hashlimit_net->ip6t_hashlimit;
-        remove_proc_entry(hinfo->pde->name, parent);
+
+        if(parent != NULL)
+                remove_proc_entry(hinfo->pde->name, parent);
+
         htable_selective_cleanup(hinfo, select_all);
         vfree(hinfo);
 }
@@ -585,6 +599,7 @@ hashlimit_mt(const struct sk_buff *skb, struct xt_action_param *par)
         unsigned long now = jiffies;
         struct dsthash_ent *dh;
         struct dsthash_dst dst;
+        bool race = false;
         u32 cost;
 
         if (hashlimit_init_dst(hinfo, &dst, skb, par->thoff) < 0)
@@ -593,13 +608,18 @@ hashlimit_mt(const struct sk_buff *skb, struct xt_action_param *par)
         rcu_read_lock_bh();
         dh = dsthash_find(hinfo, &dst);
         if (dh == NULL) {
-                dh = dsthash_alloc_init(hinfo, &dst);
+                dh = dsthash_alloc_init(hinfo, &dst, &race);
                 if (dh == NULL) {
                         rcu_read_unlock_bh();
                         goto hotdrop;
+                } else if (race) {
+                        /* Already got an entry, update expiration timeout */
+                        dh->expires = now + msecs_to_jiffies(hinfo->cfg.expire);
+                        rateinfo_recalc(dh, now, hinfo->cfg.mode);
+                } else {
+                        dh->expires = jiffies + msecs_to_jiffies(hinfo->cfg.expire);
+                        rateinfo_init(dh, hinfo);
                 }
-                dh->expires = jiffies + msecs_to_jiffies(hinfo->cfg.expire);
-                rateinfo_init(dh, hinfo);
         } else {
                 /* update expiration timeout */
                 dh->expires = now + msecs_to_jiffies(hinfo->cfg.expire);
@@ -856,6 +876,27 @@ static int __net_init hashlimit_proc_net_init(struct net *net)
 
 static void __net_exit hashlimit_proc_net_exit(struct net *net)
 {
+        struct xt_hashlimit_htable *hinfo;
+        struct hlist_node *pos;
+        struct proc_dir_entry *pde;
+        struct hashlimit_net *hashlimit_net = hashlimit_pernet(net);
+
+        /* recent_net_exit() is called before recent_mt_destroy(). Make sure
+         * that the parent xt_recent proc entry is is empty before trying to
+         * remove it.
+         */
+        mutex_lock(&hashlimit_mutex);
+        pde = hashlimit_net->ipt_hashlimit;
+        if (pde == NULL)
+                pde = hashlimit_net->ip6t_hashlimit;
+
+        hlist_for_each_entry(hinfo, pos, &hashlimit_net->htables, node)
+                remove_proc_entry(hinfo->pde->name, pde);
+
+        hashlimit_net->ipt_hashlimit = NULL;
+        hashlimit_net->ip6t_hashlimit = NULL;
+        mutex_unlock(&hashlimit_mutex);
+
         proc_net_remove(net, "ipt_hashlimit");
 #if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
         proc_net_remove(net, "ip6t_hashlimit");
@@ -872,9 +913,6 @@ static int __net_init hashlimit_net_init(struct net *net)
 
 static void __net_exit hashlimit_net_exit(struct net *net)
 {
-        struct hashlimit_net *hashlimit_net = hashlimit_pernet(net);
-
-        BUG_ON(!hlist_empty(&hashlimit_net->htables));
         hashlimit_proc_net_exit(net);
 }
 
diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c
index 4635c9b00459..978efc9b555a 100644
--- a/net/netfilter/xt_recent.c
+++ b/net/netfilter/xt_recent.c
@@ -29,6 +29,7 @@
 #include <linux/skbuff.h>
 #include <linux/inet.h>
 #include <linux/slab.h>
+#include <linux/vmalloc.h>
 #include <net/net_namespace.h>
 #include <net/netns/generic.h>
 
@@ -310,6 +311,14 @@ out:
         return ret;
 }
 
+static void recent_table_free(void *addr)
+{
+        if (is_vmalloc_addr(addr))
+                vfree(addr);
+        else
+                kfree(addr);
+}
+
 static int recent_mt_check(const struct xt_mtchk_param *par,
                            const struct xt_recent_mtinfo_v1 *info)
 {
@@ -322,6 +331,7 @@ static int recent_mt_check(const struct xt_mtchk_param *par,
 #endif
         unsigned int i;
         int ret = -EINVAL;
+        size_t sz;
 
         if (unlikely(!hash_rnd_inited)) {
                 get_random_bytes(&hash_rnd, sizeof(hash_rnd));
@@ -360,8 +370,11 @@ static int recent_mt_check(const struct xt_mtchk_param *par,
                 goto out;
         }
 
-        t = kzalloc(sizeof(*t) + sizeof(t->iphash[0]) * ip_list_hash_size,
-                    GFP_KERNEL);
+        sz = sizeof(*t) + sizeof(t->iphash[0]) * ip_list_hash_size;
+        if (sz <= PAGE_SIZE)
+                t = kzalloc(sz, GFP_KERNEL);
+        else
+                t = vzalloc(sz);
         if (t == NULL) {
                 ret = -ENOMEM;
                 goto out;
@@ -377,14 +390,14 @@ static int recent_mt_check(const struct xt_mtchk_param *par,
         uid = make_kuid(&init_user_ns, ip_list_uid);
         gid = make_kgid(&init_user_ns, ip_list_gid);
         if (!uid_valid(uid) || !gid_valid(gid)) {
-                kfree(t);
+                recent_table_free(t);
                 ret = -EINVAL;
                 goto out;
         }
         pde = proc_create_data(t->name, ip_list_perms, recent_net->xt_recent,
                   &recent_mt_fops, t);
         if (pde == NULL) {
-                kfree(t);
+                recent_table_free(t);
                 ret = -ENOMEM;
                 goto out;
         }
@@ -431,10 +444,11 @@ static void recent_mt_destroy(const struct xt_mtdtor_param *par)
                 list_del(&t->list);
                 spin_unlock_bh(&recent_lock);
 #ifdef CONFIG_PROC_FS
-                remove_proc_entry(t->name, recent_net->xt_recent);
+                if (recent_net->xt_recent != NULL)
+                        remove_proc_entry(t->name, recent_net->xt_recent);
 #endif
                 recent_table_flush(t);
-                kfree(t);
+                recent_table_free(t);
         }
         mutex_unlock(&recent_mutex);
 }
@@ -615,6 +629,20 @@ static int __net_init recent_proc_net_init(struct net *net)
 
 static void __net_exit recent_proc_net_exit(struct net *net)
 {
+        struct recent_net *recent_net = recent_pernet(net);
+        struct recent_table *t;
+
+        /* recent_net_exit() is called before recent_mt_destroy(). Make sure
+         * that the parent xt_recent proc entry is is empty before trying to
+         * remove it.
+         */
+        spin_lock_bh(&recent_lock);
+        list_for_each_entry(t, &recent_net->tables, list)
+                remove_proc_entry(t->name, recent_net->xt_recent);
+
+        recent_net->xt_recent = NULL;
+        spin_unlock_bh(&recent_lock);
+
         proc_net_remove(net, "xt_recent");
 }
 #else
@@ -638,9 +666,6 @@ static int __net_init recent_net_init(struct net *net)
 
 static void __net_exit recent_net_exit(struct net *net)
 {
-        struct recent_net *recent_net = recent_pernet(net);
-
-        BUG_ON(!list_empty(&recent_net->tables));
         recent_proc_net_exit(net);
 }