2 files changed, 21 insertions, 32 deletions

diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 455582384ece..7d227c644f72 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -897,42 +897,25 @@ get_counters(const struct xt_table_info *t,
 	struct ip6t_entry *iter;
 	unsigned int cpu;
 	unsigned int i;
-	unsigned int curcpu = get_cpu();
-
-	/* Instead of clearing (by a previous call to memset())
-	 * the counters and using adds, we set the counters
-	 * with data used by 'current' CPU
-	 *
-	 * Bottom half has to be disabled to prevent deadlock
-	 * if new softirq were to run and call ipt_do_table
-	 */
-	local_bh_disable();
-	i = 0;
-	xt_entry_foreach(iter, t->entries[curcpu], t->size) {
-		SET_COUNTER(counters[i], iter->counters.bcnt,
-			    iter->counters.pcnt);
-		++i;
-	}
-	local_bh_enable();
-	/* Processing counters from other cpus, we can let bottom half enabled,
-	 * (preemption is disabled)
-	 */
 
 	for_each_possible_cpu(cpu) {
-		if (cpu == curcpu)
-			continue;
+		seqlock_t *lock = &per_cpu(xt_info_locks, cpu).lock;
+
 		i = 0;
-		local_bh_disable();
-		xt_info_wrlock(cpu);
 		xt_entry_foreach(iter, t->entries[cpu], t->size) {
-			ADD_COUNTER(counters[i], iter->counters.bcnt,
-				    iter->counters.pcnt);
+			u64 bcnt, pcnt;
+			unsigned int start;
+
+			do {
+				start = read_seqbegin(lock);
+				bcnt = iter->counters.bcnt;
+				pcnt = iter->counters.pcnt;
+			} while (read_seqretry(lock, start));
+
+			ADD_COUNTER(counters[i], bcnt, pcnt);
 			++i;
 		}
-		xt_info_wrunlock(cpu);
-		local_bh_enable();
 	}
-	put_cpu();
 }
 
 static struct xt_counters *alloc_counters(const struct xt_table *table)
@@ -945,7 +928,7 @@ static struct xt_counters *alloc_counters(const struct xt_table *table)
 	   (other than comefrom, which userspace doesn't care
 	   about). */
 	countersize = sizeof(struct xt_counters) * private->number;
-	counters = vmalloc(countersize);
+	counters = vzalloc(countersize);
 
 	if (counters == NULL)
 		return ERR_PTR(-ENOMEM);
@@ -1216,7 +1199,7 @@ __do_replace(struct net *net, const char *name, unsigned int valid_hooks,
 	struct ip6t_entry *iter;
 
 	ret = 0;
-	counters = vmalloc(num_counters * sizeof(struct xt_counters));
+	counters = vzalloc(num_counters * sizeof(struct xt_counters));
 	if (!counters) {
 		ret = -ENOMEM;
 		goto out;
diff --git a/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c b/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c
index 99abfb53bab9..97c5b21b9674 100644
--- a/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c
+++ b/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c
@@ -19,13 +19,15 @@
 
 #include <linux/netfilter_ipv6.h>
 #include <linux/netfilter_bridge.h>
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
 #include <net/netfilter/nf_conntrack.h>
 #include <net/netfilter/nf_conntrack_helper.h>
 #include <net/netfilter/nf_conntrack_l4proto.h>
 #include <net/netfilter/nf_conntrack_l3proto.h>
 #include <net/netfilter/nf_conntrack_core.h>
-#include <net/netfilter/nf_conntrack_zones.h>
 #include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
+#endif
+#include <net/netfilter/nf_conntrack_zones.h>
 #include <net/netfilter/ipv6/nf_defrag_ipv6.h>
 
 static enum ip6_defrag_users nf_ct6_defrag_user(unsigned int hooknum,
@@ -33,8 +35,10 @@ static enum ip6_defrag_users nf_ct6_defrag_user(unsigned int hooknum,
 {
 	u16 zone = NF_CT_DEFAULT_ZONE;
 
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
 	if (skb->nfct)
 		zone = nf_ct_zone((struct nf_conn *)skb->nfct);
+#endif
 
 #ifdef CONFIG_BRIDGE_NETFILTER
 	if (skb->nf_bridge &&
@@ -56,9 +60,11 @@ static unsigned int ipv6_defrag(unsigned int hooknum,
 {
 	struct sk_buff *reasm;
 
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
 	/* Previously seen (loopback)?	*/
 	if (skb->nfct && !nf_ct_is_template((struct nf_conn *)skb->nfct))
 		return NF_ACCEPT;
+#endif
 
 	reasm = nf_ct_frag6_gather(skb, nf_ct6_defrag_user(hooknum, skb));
 	/* queued */