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-rw-r--r--include/linux/netfilter/x_tables.h7
-rw-r--r--include/net/netfilter/nf_tables.h3
-rw-r--r--net/ipv4/netfilter/arp_tables.c16
-rw-r--r--net/ipv4/netfilter/ip_tables.c16
-rw-r--r--net/ipv6/netfilter/ip6_tables.c16
-rw-r--r--net/netfilter/nf_conntrack_netlink.c1
-rw-r--r--net/netfilter/nf_conntrack_proto_gre.c3
-rw-r--r--net/netfilter/nf_flow_table_core.c2
-rw-r--r--net/netfilter/nf_tables_api.c22
-rw-r--r--net/netfilter/x_tables.c49
10 files changed, 86 insertions, 49 deletions
diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h
index 8ebb64193757..8ec48466410a 100644
--- a/include/linux/netfilter/x_tables.h
+++ b/include/linux/netfilter/x_tables.h
@@ -227,7 +227,7 @@ struct xt_table {
unsigned int valid_hooks;
/* Man behind the curtain... */
- struct xt_table_info __rcu *private;
+ struct xt_table_info *private;
/* Set this to THIS_MODULE if you are a module, otherwise NULL */
struct module *me;
@@ -376,7 +376,7 @@ static inline unsigned int xt_write_recseq_begin(void)
* since addend is most likely 1
*/
__this_cpu_add(xt_recseq.sequence, addend);
- smp_wmb();
+ smp_mb();
return addend;
}
@@ -448,9 +448,6 @@ xt_get_per_cpu_counter(struct xt_counters *cnt, unsigned int cpu)
struct nf_hook_ops *xt_hook_ops_alloc(const struct xt_table *, nf_hookfn *);
-struct xt_table_info
-*xt_table_get_private_protected(const struct xt_table *table);
-
#ifdef CONFIG_COMPAT
#include <net/compat.h>
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index fdec57d862b7..5aaced6bf13e 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -1536,6 +1536,7 @@ struct nft_trans_flowtable {
struct nft_flowtable *flowtable;
bool update;
struct list_head hook_list;
+ u32 flags;
};
#define nft_trans_flowtable(trans) \
@@ -1544,6 +1545,8 @@ struct nft_trans_flowtable {
(((struct nft_trans_flowtable *)trans->data)->update)
#define nft_trans_flowtable_hooks(trans) \
(((struct nft_trans_flowtable *)trans->data)->hook_list)
+#define nft_trans_flowtable_flags(trans) \
+ (((struct nft_trans_flowtable *)trans->data)->flags)
int __init nft_chain_filter_init(void);
void nft_chain_filter_fini(void);
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index c576a63d09db..d1e04d2b5170 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -203,7 +203,7 @@ unsigned int arpt_do_table(struct sk_buff *skb,
local_bh_disable();
addend = xt_write_recseq_begin();
- private = rcu_access_pointer(table->private);
+ private = READ_ONCE(table->private); /* Address dependency. */
cpu = smp_processor_id();
table_base = private->entries;
jumpstack = (struct arpt_entry **)private->jumpstack[cpu];
@@ -649,7 +649,7 @@ static struct xt_counters *alloc_counters(const struct xt_table *table)
{
unsigned int countersize;
struct xt_counters *counters;
- const struct xt_table_info *private = xt_table_get_private_protected(table);
+ const struct xt_table_info *private = table->private;
/* We need atomic snapshot of counters: rest doesn't change
* (other than comefrom, which userspace doesn't care
@@ -673,7 +673,7 @@ static int copy_entries_to_user(unsigned int total_size,
unsigned int off, num;
const struct arpt_entry *e;
struct xt_counters *counters;
- struct xt_table_info *private = xt_table_get_private_protected(table);
+ struct xt_table_info *private = table->private;
int ret = 0;
void *loc_cpu_entry;
@@ -807,7 +807,7 @@ static int get_info(struct net *net, void __user *user, const int *len)
t = xt_request_find_table_lock(net, NFPROTO_ARP, name);
if (!IS_ERR(t)) {
struct arpt_getinfo info;
- const struct xt_table_info *private = xt_table_get_private_protected(t);
+ const struct xt_table_info *private = t->private;
#ifdef CONFIG_COMPAT
struct xt_table_info tmp;
@@ -860,7 +860,7 @@ static int get_entries(struct net *net, struct arpt_get_entries __user *uptr,
t = xt_find_table_lock(net, NFPROTO_ARP, get.name);
if (!IS_ERR(t)) {
- const struct xt_table_info *private = xt_table_get_private_protected(t);
+ const struct xt_table_info *private = t->private;
if (get.size == private->size)
ret = copy_entries_to_user(private->size,
@@ -1017,7 +1017,7 @@ static int do_add_counters(struct net *net, sockptr_t arg, unsigned int len)
}
local_bh_disable();
- private = xt_table_get_private_protected(t);
+ private = t->private;
if (private->number != tmp.num_counters) {
ret = -EINVAL;
goto unlock_up_free;
@@ -1330,7 +1330,7 @@ static int compat_copy_entries_to_user(unsigned int total_size,
void __user *userptr)
{
struct xt_counters *counters;
- const struct xt_table_info *private = xt_table_get_private_protected(table);
+ const struct xt_table_info *private = table->private;
void __user *pos;
unsigned int size;
int ret = 0;
@@ -1379,7 +1379,7 @@ static int compat_get_entries(struct net *net,
xt_compat_lock(NFPROTO_ARP);
t = xt_find_table_lock(net, NFPROTO_ARP, get.name);
if (!IS_ERR(t)) {
- const struct xt_table_info *private = xt_table_get_private_protected(t);
+ const struct xt_table_info *private = t->private;
struct xt_table_info info;
ret = compat_table_info(private, &info);
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index e8f6f9d86237..f15bc21d7301 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -258,7 +258,7 @@ ipt_do_table(struct sk_buff *skb,
WARN_ON(!(table->valid_hooks & (1 << hook)));
local_bh_disable();
addend = xt_write_recseq_begin();
- private = rcu_access_pointer(table->private);
+ private = READ_ONCE(table->private); /* Address dependency. */
cpu = smp_processor_id();
table_base = private->entries;
jumpstack = (struct ipt_entry **)private->jumpstack[cpu];
@@ -791,7 +791,7 @@ static struct xt_counters *alloc_counters(const struct xt_table *table)
{
unsigned int countersize;
struct xt_counters *counters;
- const struct xt_table_info *private = xt_table_get_private_protected(table);
+ const struct xt_table_info *private = table->private;
/* We need atomic snapshot of counters: rest doesn't change
(other than comefrom, which userspace doesn't care
@@ -815,7 +815,7 @@ copy_entries_to_user(unsigned int total_size,
unsigned int off, num;
const struct ipt_entry *e;
struct xt_counters *counters;
- const struct xt_table_info *private = xt_table_get_private_protected(table);
+ const struct xt_table_info *private = table->private;
int ret = 0;
const void *loc_cpu_entry;
@@ -964,7 +964,7 @@ static int get_info(struct net *net, void __user *user, const int *len)
t = xt_request_find_table_lock(net, AF_INET, name);
if (!IS_ERR(t)) {
struct ipt_getinfo info;
- const struct xt_table_info *private = xt_table_get_private_protected(t);
+ const struct xt_table_info *private = t->private;
#ifdef CONFIG_COMPAT
struct xt_table_info tmp;
@@ -1018,7 +1018,7 @@ get_entries(struct net *net, struct ipt_get_entries __user *uptr,
t = xt_find_table_lock(net, AF_INET, get.name);
if (!IS_ERR(t)) {
- const struct xt_table_info *private = xt_table_get_private_protected(t);
+ const struct xt_table_info *private = t->private;
if (get.size == private->size)
ret = copy_entries_to_user(private->size,
t, uptr->entrytable);
@@ -1173,7 +1173,7 @@ do_add_counters(struct net *net, sockptr_t arg, unsigned int len)
}
local_bh_disable();
- private = xt_table_get_private_protected(t);
+ private = t->private;
if (private->number != tmp.num_counters) {
ret = -EINVAL;
goto unlock_up_free;
@@ -1543,7 +1543,7 @@ compat_copy_entries_to_user(unsigned int total_size, struct xt_table *table,
void __user *userptr)
{
struct xt_counters *counters;
- const struct xt_table_info *private = xt_table_get_private_protected(table);
+ const struct xt_table_info *private = table->private;
void __user *pos;
unsigned int size;
int ret = 0;
@@ -1589,7 +1589,7 @@ compat_get_entries(struct net *net, struct compat_ipt_get_entries __user *uptr,
xt_compat_lock(AF_INET);
t = xt_find_table_lock(net, AF_INET, get.name);
if (!IS_ERR(t)) {
- const struct xt_table_info *private = xt_table_get_private_protected(t);
+ const struct xt_table_info *private = t->private;
struct xt_table_info info;
ret = compat_table_info(private, &info);
if (!ret && get.size == info.size)
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 0d453fa9e327..2e2119bfcf13 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -280,7 +280,7 @@ ip6t_do_table(struct sk_buff *skb,
local_bh_disable();
addend = xt_write_recseq_begin();
- private = rcu_access_pointer(table->private);
+ private = READ_ONCE(table->private); /* Address dependency. */
cpu = smp_processor_id();
table_base = private->entries;
jumpstack = (struct ip6t_entry **)private->jumpstack[cpu];
@@ -807,7 +807,7 @@ static struct xt_counters *alloc_counters(const struct xt_table *table)
{
unsigned int countersize;
struct xt_counters *counters;
- const struct xt_table_info *private = xt_table_get_private_protected(table);
+ const struct xt_table_info *private = table->private;
/* We need atomic snapshot of counters: rest doesn't change
(other than comefrom, which userspace doesn't care
@@ -831,7 +831,7 @@ copy_entries_to_user(unsigned int total_size,
unsigned int off, num;
const struct ip6t_entry *e;
struct xt_counters *counters;
- const struct xt_table_info *private = xt_table_get_private_protected(table);
+ const struct xt_table_info *private = table->private;
int ret = 0;
const void *loc_cpu_entry;
@@ -980,7 +980,7 @@ static int get_info(struct net *net, void __user *user, const int *len)
t = xt_request_find_table_lock(net, AF_INET6, name);
if (!IS_ERR(t)) {
struct ip6t_getinfo info;
- const struct xt_table_info *private = xt_table_get_private_protected(t);
+ const struct xt_table_info *private = t->private;
#ifdef CONFIG_COMPAT
struct xt_table_info tmp;
@@ -1035,7 +1035,7 @@ get_entries(struct net *net, struct ip6t_get_entries __user *uptr,
t = xt_find_table_lock(net, AF_INET6, get.name);
if (!IS_ERR(t)) {
- struct xt_table_info *private = xt_table_get_private_protected(t);
+ struct xt_table_info *private = t->private;
if (get.size == private->size)
ret = copy_entries_to_user(private->size,
t, uptr->entrytable);
@@ -1189,7 +1189,7 @@ do_add_counters(struct net *net, sockptr_t arg, unsigned int len)
}
local_bh_disable();
- private = xt_table_get_private_protected(t);
+ private = t->private;
if (private->number != tmp.num_counters) {
ret = -EINVAL;
goto unlock_up_free;
@@ -1552,7 +1552,7 @@ compat_copy_entries_to_user(unsigned int total_size, struct xt_table *table,
void __user *userptr)
{
struct xt_counters *counters;
- const struct xt_table_info *private = xt_table_get_private_protected(table);
+ const struct xt_table_info *private = table->private;
void __user *pos;
unsigned int size;
int ret = 0;
@@ -1598,7 +1598,7 @@ compat_get_entries(struct net *net, struct compat_ip6t_get_entries __user *uptr,
xt_compat_lock(AF_INET6);
t = xt_find_table_lock(net, AF_INET6, get.name);
if (!IS_ERR(t)) {
- const struct xt_table_info *private = xt_table_get_private_protected(t);
+ const struct xt_table_info *private = t->private;
struct xt_table_info info;
ret = compat_table_info(private, &info);
if (!ret && get.size == info.size)
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 1469365bac7e..1d519b0e51a5 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -2962,6 +2962,7 @@ static int ctnetlink_exp_dump_mask(struct sk_buff *skb,
memset(&m, 0xFF, sizeof(m));
memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
m.src.u.all = mask->src.u.all;
+ m.src.l3num = tuple->src.l3num;
m.dst.protonum = tuple->dst.protonum;
nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK);
diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c
index 5b05487a60d2..db11e403d818 100644
--- a/net/netfilter/nf_conntrack_proto_gre.c
+++ b/net/netfilter/nf_conntrack_proto_gre.c
@@ -218,9 +218,6 @@ int nf_conntrack_gre_packet(struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
const struct nf_hook_state *state)
{
- if (state->pf != NFPROTO_IPV4)
- return -NF_ACCEPT;
-
if (!nf_ct_is_confirmed(ct)) {
unsigned int *timeouts = nf_ct_timeout_lookup(ct);
diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c
index 5fa657b8e03d..c77ba8690ed8 100644
--- a/net/netfilter/nf_flow_table_core.c
+++ b/net/netfilter/nf_flow_table_core.c
@@ -506,7 +506,7 @@ int nf_flow_table_init(struct nf_flowtable *flowtable)
{
int err;
- INIT_DEFERRABLE_WORK(&flowtable->gc_work, nf_flow_offload_work_gc);
+ INIT_DELAYED_WORK(&flowtable->gc_work, nf_flow_offload_work_gc);
flow_block_init(&flowtable->flow_block);
init_rwsem(&flowtable->flow_block_lock);
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 224c8e537cb3..f57f1a6ba96f 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -6783,6 +6783,9 @@ static int nft_register_flowtable_net_hooks(struct net *net,
list_for_each_entry(hook, hook_list, list) {
list_for_each_entry(ft, &table->flowtables, list) {
+ if (!nft_is_active_next(net, ft))
+ continue;
+
list_for_each_entry(hook2, &ft->hook_list, list) {
if (hook->ops.dev == hook2->ops.dev &&
hook->ops.pf == hook2->ops.pf) {
@@ -6842,6 +6845,7 @@ static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
struct nft_hook *hook, *next;
struct nft_trans *trans;
bool unregister = false;
+ u32 flags;
int err;
err = nft_flowtable_parse_hook(ctx, nla[NFTA_FLOWTABLE_HOOK],
@@ -6856,6 +6860,17 @@ static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
}
}
+ if (nla[NFTA_FLOWTABLE_FLAGS]) {
+ flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
+ if (flags & ~NFT_FLOWTABLE_MASK)
+ return -EOPNOTSUPP;
+ if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^
+ (flags & NFT_FLOWTABLE_HW_OFFLOAD))
+ return -EOPNOTSUPP;
+ } else {
+ flags = flowtable->data.flags;
+ }
+
err = nft_register_flowtable_net_hooks(ctx->net, ctx->table,
&flowtable_hook.list, flowtable);
if (err < 0)
@@ -6869,6 +6884,7 @@ static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
goto err_flowtable_update_hook;
}
+ nft_trans_flowtable_flags(trans) = flags;
nft_trans_flowtable(trans) = flowtable;
nft_trans_flowtable_update(trans) = true;
INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
@@ -6963,8 +6979,10 @@ static int nf_tables_newflowtable(struct net *net, struct sock *nlsk,
if (nla[NFTA_FLOWTABLE_FLAGS]) {
flowtable->data.flags =
ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
- if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK)
+ if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK) {
+ err = -EOPNOTSUPP;
goto err3;
+ }
}
write_pnet(&flowtable->data.net, net);
@@ -8176,6 +8194,8 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
break;
case NFT_MSG_NEWFLOWTABLE:
if (nft_trans_flowtable_update(trans)) {
+ nft_trans_flowtable(trans)->data.flags =
+ nft_trans_flowtable_flags(trans);
nf_tables_flowtable_notify(&trans->ctx,
nft_trans_flowtable(trans),
&nft_trans_flowtable_hooks(trans),
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c
index bce6ca203d46..6bd31a7a27fc 100644
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -1351,14 +1351,6 @@ struct xt_counters *xt_counters_alloc(unsigned int counters)
}
EXPORT_SYMBOL(xt_counters_alloc);
-struct xt_table_info
-*xt_table_get_private_protected(const struct xt_table *table)
-{
- return rcu_dereference_protected(table->private,
- mutex_is_locked(&xt[table->af].mutex));
-}
-EXPORT_SYMBOL(xt_table_get_private_protected);
-
struct xt_table_info *
xt_replace_table(struct xt_table *table,
unsigned int num_counters,
@@ -1366,6 +1358,7 @@ xt_replace_table(struct xt_table *table,
int *error)
{
struct xt_table_info *private;
+ unsigned int cpu;
int ret;
ret = xt_jumpstack_alloc(newinfo);
@@ -1375,20 +1368,47 @@ xt_replace_table(struct xt_table *table,
}
/* Do the substitution. */
- private = xt_table_get_private_protected(table);
+ local_bh_disable();
+ private = table->private;
/* Check inside lock: is the old number correct? */
if (num_counters != private->number) {
pr_debug("num_counters != table->private->number (%u/%u)\n",
num_counters, private->number);
+ local_bh_enable();
*error = -EAGAIN;
return NULL;
}
newinfo->initial_entries = private->initial_entries;
+ /*
+ * Ensure contents of newinfo are visible before assigning to
+ * private.
+ */
+ smp_wmb();
+ table->private = newinfo;
+
+ /* make sure all cpus see new ->private value */
+ smp_mb();
- rcu_assign_pointer(table->private, newinfo);
- synchronize_rcu();
+ /*
+ * Even though table entries have now been swapped, other CPU's
+ * may still be using the old entries...
+ */
+ local_bh_enable();
+
+ /* ... so wait for even xt_recseq on all cpus */
+ for_each_possible_cpu(cpu) {
+ seqcount_t *s = &per_cpu(xt_recseq, cpu);
+ u32 seq = raw_read_seqcount(s);
+
+ if (seq & 1) {
+ do {
+ cond_resched();
+ cpu_relax();
+ } while (seq == raw_read_seqcount(s));
+ }
+ }
audit_log_nfcfg(table->name, table->af, private->number,
!private->number ? AUDIT_XT_OP_REGISTER :
@@ -1424,12 +1444,12 @@ struct xt_table *xt_register_table(struct net *net,
}
/* Simplifies replace_table code. */
- rcu_assign_pointer(table->private, bootstrap);
+ table->private = bootstrap;
if (!xt_replace_table(table, 0, newinfo, &ret))
goto unlock;
- private = xt_table_get_private_protected(table);
+ private = table->private;
pr_debug("table->private->number = %u\n", private->number);
/* save number of initial entries */
@@ -1452,8 +1472,7 @@ void *xt_unregister_table(struct xt_table *table)
struct xt_table_info *private;
mutex_lock(&xt[table->af].mutex);
- private = xt_table_get_private_protected(table);
- RCU_INIT_POINTER(table->private, NULL);
+ private = table->private;
list_del(&table->list);
mutex_unlock(&xt[table->af].mutex);
audit_log_nfcfg(table->name, table->af, private->number,
generated by cgit v1.2.3 (git 2.39.0) at 2024-10-18 01:16:11 +0300