Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
Pablo Neira Ayuso says: ==================== Netfilter fixes for net The following patchset contains Netfilter fixes for net: 1) Fix NAT IPv6 offload in the flowtable. 2) icmpv6 is printed as unknown in /proc/net/nf_conntrack. 3) Use div64_u64() in nft_limit, from Eric Dumazet. 4) Use pre_exit to unregister ebtables and arptables hooks, from Florian Westphal. 5) Fix out-of-bound memset in x_tables compat match/target, also from Florian. 6) Clone set elements expression to ensure proper initialization. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
commit
ccb39c6285
@ -52,8 +52,9 @@ extern void *arpt_alloc_initial_table(const struct xt_table *);
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int arpt_register_table(struct net *net, const struct xt_table *table,
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const struct arpt_replace *repl,
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const struct nf_hook_ops *ops, struct xt_table **res);
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void arpt_unregister_table(struct net *net, struct xt_table *table,
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const struct nf_hook_ops *ops);
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void arpt_unregister_table(struct net *net, struct xt_table *table);
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void arpt_unregister_table_pre_exit(struct net *net, struct xt_table *table,
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const struct nf_hook_ops *ops);
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extern unsigned int arpt_do_table(struct sk_buff *skb,
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const struct nf_hook_state *state,
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struct xt_table *table);
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@ -110,8 +110,9 @@ extern int ebt_register_table(struct net *net,
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const struct ebt_table *table,
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const struct nf_hook_ops *ops,
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struct ebt_table **res);
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extern void ebt_unregister_table(struct net *net, struct ebt_table *table,
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const struct nf_hook_ops *);
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extern void ebt_unregister_table(struct net *net, struct ebt_table *table);
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void ebt_unregister_table_pre_exit(struct net *net, const char *tablename,
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const struct nf_hook_ops *ops);
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extern unsigned int ebt_do_table(struct sk_buff *skb,
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const struct nf_hook_state *state,
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struct ebt_table *table);
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@ -105,14 +105,20 @@ static int __net_init broute_net_init(struct net *net)
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&net->xt.broute_table);
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}
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static void __net_exit broute_net_pre_exit(struct net *net)
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{
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ebt_unregister_table_pre_exit(net, "broute", &ebt_ops_broute);
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}
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static void __net_exit broute_net_exit(struct net *net)
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{
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ebt_unregister_table(net, net->xt.broute_table, &ebt_ops_broute);
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ebt_unregister_table(net, net->xt.broute_table);
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}
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static struct pernet_operations broute_net_ops = {
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.init = broute_net_init,
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.exit = broute_net_exit,
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.pre_exit = broute_net_pre_exit,
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};
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static int __init ebtable_broute_init(void)
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@ -99,14 +99,20 @@ static int __net_init frame_filter_net_init(struct net *net)
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&net->xt.frame_filter);
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}
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static void __net_exit frame_filter_net_pre_exit(struct net *net)
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{
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ebt_unregister_table_pre_exit(net, "filter", ebt_ops_filter);
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}
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static void __net_exit frame_filter_net_exit(struct net *net)
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{
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ebt_unregister_table(net, net->xt.frame_filter, ebt_ops_filter);
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ebt_unregister_table(net, net->xt.frame_filter);
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}
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static struct pernet_operations frame_filter_net_ops = {
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.init = frame_filter_net_init,
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.exit = frame_filter_net_exit,
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.pre_exit = frame_filter_net_pre_exit,
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};
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static int __init ebtable_filter_init(void)
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@ -99,14 +99,20 @@ static int __net_init frame_nat_net_init(struct net *net)
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&net->xt.frame_nat);
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}
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static void __net_exit frame_nat_net_pre_exit(struct net *net)
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{
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ebt_unregister_table_pre_exit(net, "nat", ebt_ops_nat);
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}
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static void __net_exit frame_nat_net_exit(struct net *net)
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{
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ebt_unregister_table(net, net->xt.frame_nat, ebt_ops_nat);
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ebt_unregister_table(net, net->xt.frame_nat);
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}
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static struct pernet_operations frame_nat_net_ops = {
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.init = frame_nat_net_init,
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.exit = frame_nat_net_exit,
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.pre_exit = frame_nat_net_pre_exit,
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};
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static int __init ebtable_nat_init(void)
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@ -1232,10 +1232,34 @@ out:
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return ret;
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}
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void ebt_unregister_table(struct net *net, struct ebt_table *table,
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const struct nf_hook_ops *ops)
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static struct ebt_table *__ebt_find_table(struct net *net, const char *name)
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{
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struct ebt_table *t;
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mutex_lock(&ebt_mutex);
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list_for_each_entry(t, &net->xt.tables[NFPROTO_BRIDGE], list) {
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if (strcmp(t->name, name) == 0) {
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mutex_unlock(&ebt_mutex);
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return t;
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}
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}
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mutex_unlock(&ebt_mutex);
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return NULL;
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}
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void ebt_unregister_table_pre_exit(struct net *net, const char *name, const struct nf_hook_ops *ops)
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{
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struct ebt_table *table = __ebt_find_table(net, name);
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if (table)
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nf_unregister_net_hooks(net, ops, hweight32(table->valid_hooks));
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}
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EXPORT_SYMBOL(ebt_unregister_table_pre_exit);
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void ebt_unregister_table(struct net *net, struct ebt_table *table)
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{
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nf_unregister_net_hooks(net, ops, hweight32(table->valid_hooks));
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__ebt_unregister_table(net, table);
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}
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@ -1193,6 +1193,8 @@ static int translate_compat_table(struct net *net,
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if (!newinfo)
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goto out_unlock;
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memset(newinfo->entries, 0, size);
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newinfo->number = compatr->num_entries;
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for (i = 0; i < NF_ARP_NUMHOOKS; i++) {
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newinfo->hook_entry[i] = compatr->hook_entry[i];
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@ -1539,10 +1541,15 @@ out_free:
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return ret;
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}
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void arpt_unregister_table(struct net *net, struct xt_table *table,
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const struct nf_hook_ops *ops)
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void arpt_unregister_table_pre_exit(struct net *net, struct xt_table *table,
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const struct nf_hook_ops *ops)
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{
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nf_unregister_net_hooks(net, ops, hweight32(table->valid_hooks));
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}
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EXPORT_SYMBOL(arpt_unregister_table_pre_exit);
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void arpt_unregister_table(struct net *net, struct xt_table *table)
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{
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__arpt_unregister_table(net, table);
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}
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@ -56,16 +56,24 @@ static int __net_init arptable_filter_table_init(struct net *net)
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return err;
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}
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static void __net_exit arptable_filter_net_pre_exit(struct net *net)
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{
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if (net->ipv4.arptable_filter)
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arpt_unregister_table_pre_exit(net, net->ipv4.arptable_filter,
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arpfilter_ops);
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}
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static void __net_exit arptable_filter_net_exit(struct net *net)
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{
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if (!net->ipv4.arptable_filter)
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return;
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arpt_unregister_table(net, net->ipv4.arptable_filter, arpfilter_ops);
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arpt_unregister_table(net, net->ipv4.arptable_filter);
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net->ipv4.arptable_filter = NULL;
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}
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static struct pernet_operations arptable_filter_net_ops = {
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.exit = arptable_filter_net_exit,
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.pre_exit = arptable_filter_net_pre_exit,
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};
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static int __init arptable_filter_init(void)
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@ -1428,6 +1428,8 @@ translate_compat_table(struct net *net,
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if (!newinfo)
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goto out_unlock;
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memset(newinfo->entries, 0, size);
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newinfo->number = compatr->num_entries;
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for (i = 0; i < NF_INET_NUMHOOKS; i++) {
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newinfo->hook_entry[i] = compatr->hook_entry[i];
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@ -1443,6 +1443,8 @@ translate_compat_table(struct net *net,
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if (!newinfo)
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goto out_unlock;
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memset(newinfo->entries, 0, size);
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newinfo->number = compatr->num_entries;
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for (i = 0; i < NF_INET_NUMHOOKS; i++) {
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newinfo->hook_entry[i] = compatr->hook_entry[i];
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@ -266,6 +266,7 @@ static const char* l4proto_name(u16 proto)
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case IPPROTO_GRE: return "gre";
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case IPPROTO_SCTP: return "sctp";
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case IPPROTO_UDPLITE: return "udplite";
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case IPPROTO_ICMPV6: return "icmpv6";
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}
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return "unknown";
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@ -305,12 +305,12 @@ static void flow_offload_ipv6_mangle(struct nf_flow_rule *flow_rule,
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const __be32 *addr, const __be32 *mask)
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{
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struct flow_action_entry *entry;
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int i;
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int i, j;
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for (i = 0; i < sizeof(struct in6_addr) / sizeof(u32); i += sizeof(u32)) {
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for (i = 0, j = 0; i < sizeof(struct in6_addr) / sizeof(u32); i += sizeof(u32), j++) {
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entry = flow_action_entry_next(flow_rule);
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flow_offload_mangle(entry, FLOW_ACT_MANGLE_HDR_TYPE_IP6,
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offset + i, &addr[i], mask);
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offset + i, &addr[j], mask);
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}
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}
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@ -5295,16 +5295,35 @@ err_expr:
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return -ENOMEM;
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}
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static void nft_set_elem_expr_setup(const struct nft_set_ext *ext, int i,
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struct nft_expr *expr_array[])
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static int nft_set_elem_expr_setup(struct nft_ctx *ctx,
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const struct nft_set_ext *ext,
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struct nft_expr *expr_array[],
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u32 num_exprs)
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{
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struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext);
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struct nft_expr *expr = nft_setelem_expr_at(elem_expr, elem_expr->size);
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struct nft_expr *expr;
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int i, err;
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memcpy(expr, expr_array[i], expr_array[i]->ops->size);
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elem_expr->size += expr_array[i]->ops->size;
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kfree(expr_array[i]);
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expr_array[i] = NULL;
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for (i = 0; i < num_exprs; i++) {
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expr = nft_setelem_expr_at(elem_expr, elem_expr->size);
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err = nft_expr_clone(expr, expr_array[i]);
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if (err < 0)
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goto err_elem_expr_setup;
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elem_expr->size += expr_array[i]->ops->size;
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nft_expr_destroy(ctx, expr_array[i]);
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expr_array[i] = NULL;
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}
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return 0;
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err_elem_expr_setup:
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for (; i < num_exprs; i++) {
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nft_expr_destroy(ctx, expr_array[i]);
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expr_array[i] = NULL;
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}
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return -ENOMEM;
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}
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static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
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@ -5556,12 +5575,15 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
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*nft_set_ext_obj(ext) = obj;
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obj->use++;
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}
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for (i = 0; i < num_exprs; i++)
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nft_set_elem_expr_setup(ext, i, expr_array);
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err = nft_set_elem_expr_setup(ctx, ext, expr_array, num_exprs);
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if (err < 0)
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goto err_elem_expr;
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trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
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if (trans == NULL)
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goto err_trans;
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if (trans == NULL) {
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err = -ENOMEM;
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goto err_elem_expr;
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}
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ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK;
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err = set->ops->insert(ctx->net, set, &elem, &ext2);
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@ -5605,7 +5627,7 @@ err_set_full:
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set->ops->remove(ctx->net, set, &elem);
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err_element_clash:
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kfree(trans);
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err_trans:
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err_elem_expr:
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if (obj)
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obj->use--;
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@ -76,13 +76,13 @@ static int nft_limit_init(struct nft_limit *limit,
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return -EOVERFLOW;
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if (pkts) {
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tokens = div_u64(limit->nsecs, limit->rate) * limit->burst;
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tokens = div64_u64(limit->nsecs, limit->rate) * limit->burst;
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} else {
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/* The token bucket size limits the number of tokens can be
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* accumulated. tokens_max specifies the bucket size.
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* tokens_max = unit * (rate + burst) / rate.
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*/
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tokens = div_u64(limit->nsecs * (limit->rate + limit->burst),
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tokens = div64_u64(limit->nsecs * (limit->rate + limit->burst),
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limit->rate);
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}
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@ -733,7 +733,7 @@ void xt_compat_match_from_user(struct xt_entry_match *m, void **dstptr,
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{
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const struct xt_match *match = m->u.kernel.match;
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struct compat_xt_entry_match *cm = (struct compat_xt_entry_match *)m;
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int pad, off = xt_compat_match_offset(match);
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int off = xt_compat_match_offset(match);
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u_int16_t msize = cm->u.user.match_size;
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char name[sizeof(m->u.user.name)];
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@ -743,9 +743,6 @@ void xt_compat_match_from_user(struct xt_entry_match *m, void **dstptr,
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match->compat_from_user(m->data, cm->data);
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else
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memcpy(m->data, cm->data, msize - sizeof(*cm));
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pad = XT_ALIGN(match->matchsize) - match->matchsize;
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if (pad > 0)
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memset(m->data + match->matchsize, 0, pad);
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msize += off;
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m->u.user.match_size = msize;
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@ -1116,7 +1113,7 @@ void xt_compat_target_from_user(struct xt_entry_target *t, void **dstptr,
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{
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const struct xt_target *target = t->u.kernel.target;
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struct compat_xt_entry_target *ct = (struct compat_xt_entry_target *)t;
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int pad, off = xt_compat_target_offset(target);
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int off = xt_compat_target_offset(target);
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u_int16_t tsize = ct->u.user.target_size;
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char name[sizeof(t->u.user.name)];
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@ -1126,9 +1123,6 @@ void xt_compat_target_from_user(struct xt_entry_target *t, void **dstptr,
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target->compat_from_user(t->data, ct->data);
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else
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memcpy(t->data, ct->data, tsize - sizeof(*ct));
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pad = XT_ALIGN(target->targetsize) - target->targetsize;
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if (pad > 0)
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memset(t->data + target->targetsize, 0, pad);
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tsize += off;
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t->u.user.target_size = tsize;
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