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-rw-r--r--net/netfilter/nf_tables_api.c853
1 files changed, 610 insertions, 243 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index c0851fec11d4..e7152d599d73 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -32,7 +32,6 @@ static LIST_HEAD(nf_tables_objects);
static LIST_HEAD(nf_tables_flowtables);
static LIST_HEAD(nf_tables_destroy_list);
static DEFINE_SPINLOCK(nf_tables_destroy_list_lock);
-static u64 table_handle;
enum {
NFT_VALIDATE_SKIP = 0,
@@ -153,6 +152,7 @@ static struct nft_trans *nft_trans_alloc_gfp(const struct nft_ctx *ctx,
if (trans == NULL)
return NULL;
+ INIT_LIST_HEAD(&trans->list);
trans->msg_type = msg_type;
trans->ctx = *ctx;
@@ -222,12 +222,18 @@ err_register:
}
static void nft_netdev_unregister_hooks(struct net *net,
- struct list_head *hook_list)
+ struct list_head *hook_list,
+ bool release_netdev)
{
- struct nft_hook *hook;
+ struct nft_hook *hook, *next;
- list_for_each_entry(hook, hook_list, list)
+ list_for_each_entry_safe(hook, next, hook_list, list) {
nf_unregister_net_hook(net, &hook->ops);
+ if (release_netdev) {
+ list_del(&hook->list);
+ kfree_rcu(hook, rcu);
+ }
+ }
}
static int nf_tables_register_hook(struct net *net,
@@ -253,9 +259,10 @@ static int nf_tables_register_hook(struct net *net,
return nf_register_net_hook(net, &basechain->ops);
}
-static void nf_tables_unregister_hook(struct net *net,
- const struct nft_table *table,
- struct nft_chain *chain)
+static void __nf_tables_unregister_hook(struct net *net,
+ const struct nft_table *table,
+ struct nft_chain *chain,
+ bool release_netdev)
{
struct nft_base_chain *basechain;
const struct nf_hook_ops *ops;
@@ -270,11 +277,19 @@ static void nf_tables_unregister_hook(struct net *net,
return basechain->type->ops_unregister(net, ops);
if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
- nft_netdev_unregister_hooks(net, &basechain->hook_list);
+ nft_netdev_unregister_hooks(net, &basechain->hook_list,
+ release_netdev);
else
nf_unregister_net_hook(net, &basechain->ops);
}
+static void nf_tables_unregister_hook(struct net *net,
+ const struct nft_table *table,
+ struct nft_chain *chain)
+{
+ return __nf_tables_unregister_hook(net, table, chain, false);
+}
+
static void nft_trans_commit_list_add_tail(struct net *net, struct nft_trans *trans)
{
struct nftables_pernet *nft_net = nft_pernet(net);
@@ -529,6 +544,7 @@ static int nft_trans_flowtable_add(struct nft_ctx *ctx, int msg_type,
if (msg_type == NFT_MSG_NEWFLOWTABLE)
nft_activate_next(ctx->net, flowtable);
+ INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
nft_trans_flowtable(trans) = flowtable;
nft_trans_commit_list_add_tail(ctx->net, trans);
@@ -550,6 +566,58 @@ static int nft_delflowtable(struct nft_ctx *ctx,
return err;
}
+static void __nft_reg_track_clobber(struct nft_regs_track *track, u8 dreg)
+{
+ int i;
+
+ for (i = track->regs[dreg].num_reg; i > 0; i--)
+ __nft_reg_track_cancel(track, dreg - i);
+}
+
+static void __nft_reg_track_update(struct nft_regs_track *track,
+ const struct nft_expr *expr,
+ u8 dreg, u8 num_reg)
+{
+ track->regs[dreg].selector = expr;
+ track->regs[dreg].bitwise = NULL;
+ track->regs[dreg].num_reg = num_reg;
+}
+
+void nft_reg_track_update(struct nft_regs_track *track,
+ const struct nft_expr *expr, u8 dreg, u8 len)
+{
+ unsigned int regcount;
+ int i;
+
+ __nft_reg_track_clobber(track, dreg);
+
+ regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
+ for (i = 0; i < regcount; i++, dreg++)
+ __nft_reg_track_update(track, expr, dreg, i);
+}
+EXPORT_SYMBOL_GPL(nft_reg_track_update);
+
+void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len)
+{
+ unsigned int regcount;
+ int i;
+
+ __nft_reg_track_clobber(track, dreg);
+
+ regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
+ for (i = 0; i < regcount; i++, dreg++)
+ __nft_reg_track_cancel(track, dreg);
+}
+EXPORT_SYMBOL_GPL(nft_reg_track_cancel);
+
+void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg)
+{
+ track->regs[dreg].selector = NULL;
+ track->regs[dreg].bitwise = NULL;
+ track->regs[dreg].num_reg = 0;
+}
+EXPORT_SYMBOL_GPL(__nft_reg_track_cancel);
+
/*
* Tables
*/
@@ -674,7 +742,7 @@ __printf(2, 3) int nft_request_module(struct net *net, const char *fmt,
return -ENOMEM;
req->done = false;
- strlcpy(req->module, module_name, MODULE_NAME_LEN);
+ strscpy(req->module, module_name, MODULE_NAME_LEN);
list_add_tail(&req->list, &nft_net->module_list);
return -EAGAIN;
@@ -820,7 +888,7 @@ static int nf_tables_dump_tables(struct sk_buff *skb,
rcu_read_lock();
nft_net = nft_pernet(net);
- cb->seq = nft_net->base_seq;
+ cb->seq = READ_ONCE(nft_net->base_seq);
list_for_each_entry_rcu(table, &nft_net->tables, list) {
if (family != NFPROTO_UNSPEC && family != table->family)
@@ -1072,6 +1140,30 @@ static int nft_objname_hash_cmp(struct rhashtable_compare_arg *arg,
return strcmp(obj->key.name, k->name);
}
+static bool nft_supported_family(u8 family)
+{
+ return false
+#ifdef CONFIG_NF_TABLES_INET
+ || family == NFPROTO_INET
+#endif
+#ifdef CONFIG_NF_TABLES_IPV4
+ || family == NFPROTO_IPV4
+#endif
+#ifdef CONFIG_NF_TABLES_ARP
+ || family == NFPROTO_ARP
+#endif
+#ifdef CONFIG_NF_TABLES_NETDEV
+ || family == NFPROTO_NETDEV
+#endif
+#if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE)
+ || family == NFPROTO_BRIDGE
+#endif
+#ifdef CONFIG_NF_TABLES_IPV6
+ || family == NFPROTO_IPV6
+#endif
+ ;
+}
+
static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
const struct nlattr * const nla[])
{
@@ -1086,6 +1178,9 @@ static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
u32 flags = 0;
int err;
+ if (!nft_supported_family(family))
+ return -EOPNOTSUPP;
+
lockdep_assert_held(&nft_net->commit_mutex);
attr = nla[NFTA_TABLE_NAME];
table = nft_table_lookup(net, attr, family, genmask,
@@ -1113,16 +1208,16 @@ static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
}
err = -ENOMEM;
- table = kzalloc(sizeof(*table), GFP_KERNEL);
+ table = kzalloc(sizeof(*table), GFP_KERNEL_ACCOUNT);
if (table == NULL)
goto err_kzalloc;
- table->name = nla_strdup(attr, GFP_KERNEL);
+ table->name = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
if (table->name == NULL)
goto err_strdup;
if (nla[NFTA_TABLE_USERDATA]) {
- table->udata = nla_memdup(nla[NFTA_TABLE_USERDATA], GFP_KERNEL);
+ table->udata = nla_memdup(nla[NFTA_TABLE_USERDATA], GFP_KERNEL_ACCOUNT);
if (table->udata == NULL)
goto err_table_udata;
@@ -1139,7 +1234,7 @@ static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
INIT_LIST_HEAD(&table->flowtables);
table->family = family;
table->flags = flags;
- table->handle = ++table_handle;
+ table->handle = ++nft_net->table_handle;
if (table->flags & NFT_TABLE_F_OWNER)
table->nlpid = NETLINK_CB(skb).portid;
@@ -1609,7 +1704,7 @@ static int nf_tables_dump_chains(struct sk_buff *skb,
rcu_read_lock();
nft_net = nft_pernet(net);
- cb->seq = nft_net->base_seq;
+ cb->seq = READ_ONCE(nft_net->base_seq);
list_for_each_entry_rcu(table, &nft_net->tables, list) {
if (family != NFPROTO_UNSPEC && family != table->family)
@@ -1747,16 +1842,16 @@ static void nft_chain_stats_replace(struct nft_trans *trans)
static void nf_tables_chain_free_chain_rules(struct nft_chain *chain)
{
- struct nft_rule **g0 = rcu_dereference_raw(chain->rules_gen_0);
- struct nft_rule **g1 = rcu_dereference_raw(chain->rules_gen_1);
+ struct nft_rule_blob *g0 = rcu_dereference_raw(chain->blob_gen_0);
+ struct nft_rule_blob *g1 = rcu_dereference_raw(chain->blob_gen_1);
if (g0 != g1)
kvfree(g1);
kvfree(g0);
/* should be NULL either via abort or via successful commit */
- WARN_ON_ONCE(chain->rules_next);
- kvfree(chain->rules_next);
+ WARN_ON_ONCE(chain->blob_next);
+ kvfree(chain->blob_next);
}
void nf_tables_chain_destroy(struct nft_ctx *ctx)
@@ -1803,7 +1898,7 @@ static struct nft_hook *nft_netdev_hook_alloc(struct net *net,
struct nft_hook *hook;
int err;
- hook = kmalloc(sizeof(struct nft_hook), GFP_KERNEL);
+ hook = kmalloc(sizeof(struct nft_hook), GFP_KERNEL_ACCOUNT);
if (!hook) {
err = -ENOMEM;
goto err_hook_alloc;
@@ -1820,7 +1915,6 @@ static struct nft_hook *nft_netdev_hook_alloc(struct net *net,
goto err_hook_dev;
}
hook->ops.dev = dev;
- hook->inactive = false;
return hook;
@@ -2002,23 +2096,38 @@ static void nft_chain_release_hook(struct nft_chain_hook *hook)
struct nft_rules_old {
struct rcu_head h;
- struct nft_rule **start;
+ struct nft_rule_blob *blob;
};
-static struct nft_rule **nf_tables_chain_alloc_rules(const struct nft_chain *chain,
- unsigned int alloc)
+static void nft_last_rule(struct nft_rule_blob *blob, const void *ptr)
{
- if (alloc > INT_MAX)
+ struct nft_rule_dp *prule;
+
+ prule = (struct nft_rule_dp *)ptr;
+ prule->is_last = 1;
+ /* blob size does not include the trailer rule */
+}
+
+static struct nft_rule_blob *nf_tables_chain_alloc_rules(unsigned int size)
+{
+ struct nft_rule_blob *blob;
+
+ /* size must include room for the last rule */
+ if (size < offsetof(struct nft_rule_dp, data))
return NULL;
- alloc += 1; /* NULL, ends rules */
- if (sizeof(struct nft_rule *) > INT_MAX / alloc)
+ size += sizeof(struct nft_rule_blob) + sizeof(struct nft_rules_old);
+ if (size > INT_MAX)
return NULL;
- alloc *= sizeof(struct nft_rule *);
- alloc += sizeof(struct nft_rules_old);
+ blob = kvmalloc(size, GFP_KERNEL_ACCOUNT);
+ if (!blob)
+ return NULL;
+
+ blob->size = 0;
+ nft_last_rule(blob, blob->data);
- return kvmalloc(alloc, GFP_KERNEL);
+ return blob;
}
static void nft_basechain_hook_init(struct nf_hook_ops *ops, u8 family,
@@ -2057,8 +2166,10 @@ static int nft_basechain_init(struct nft_base_chain *basechain, u8 family,
chain->flags |= NFT_CHAIN_BASE | flags;
basechain->policy = NF_ACCEPT;
if (chain->flags & NFT_CHAIN_HW_OFFLOAD &&
- nft_chain_offload_priority(basechain) < 0)
+ !nft_chain_offload_support(basechain)) {
+ list_splice_init(&basechain->hook_list, &hook->list);
return -EOPNOTSUPP;
+ }
flow_block_init(&basechain->flow_block);
@@ -2088,18 +2199,19 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
const struct nlattr * const *nla = ctx->nla;
struct nft_table *table = ctx->table;
struct nft_base_chain *basechain;
- struct nft_stats __percpu *stats;
struct net *net = ctx->net;
char name[NFT_NAME_MAXLEN];
+ struct nft_rule_blob *blob;
struct nft_trans *trans;
struct nft_chain *chain;
- struct nft_rule **rules;
+ unsigned int data_size;
int err;
if (table->use == UINT_MAX)
return -EOVERFLOW;
if (nla[NFTA_CHAIN_HOOK]) {
+ struct nft_stats __percpu *stats = NULL;
struct nft_chain_hook hook;
if (flags & NFT_CHAIN_BINDING)
@@ -2110,7 +2222,7 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
if (err < 0)
return err;
- basechain = kzalloc(sizeof(*basechain), GFP_KERNEL);
+ basechain = kzalloc(sizeof(*basechain), GFP_KERNEL_ACCOUNT);
if (basechain == NULL) {
nft_chain_release_hook(&hook);
return -ENOMEM;
@@ -2125,22 +2237,24 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
return PTR_ERR(stats);
}
rcu_assign_pointer(basechain->stats, stats);
- static_branch_inc(&nft_counters_enabled);
}
err = nft_basechain_init(basechain, family, &hook, flags);
if (err < 0) {
nft_chain_release_hook(&hook);
kfree(basechain);
+ free_percpu(stats);
return err;
}
+ if (stats)
+ static_branch_inc(&nft_counters_enabled);
} else {
if (flags & NFT_CHAIN_BASE)
return -EINVAL;
if (flags & NFT_CHAIN_HW_OFFLOAD)
return -EOPNOTSUPP;
- chain = kzalloc(sizeof(*chain), GFP_KERNEL);
+ chain = kzalloc(sizeof(*chain), GFP_KERNEL_ACCOUNT);
if (chain == NULL)
return -ENOMEM;
@@ -2153,7 +2267,7 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
chain->table = table;
if (nla[NFTA_CHAIN_NAME]) {
- chain->name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL);
+ chain->name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
} else {
if (!(flags & NFT_CHAIN_BINDING)) {
err = -EINVAL;
@@ -2161,7 +2275,7 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
}
snprintf(name, sizeof(name), "__chain%llu", ++chain_id);
- chain->name = kstrdup(name, GFP_KERNEL);
+ chain->name = kstrdup(name, GFP_KERNEL_ACCOUNT);
}
if (!chain->name) {
@@ -2170,7 +2284,7 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
}
if (nla[NFTA_CHAIN_USERDATA]) {
- chain->udata = nla_memdup(nla[NFTA_CHAIN_USERDATA], GFP_KERNEL);
+ chain->udata = nla_memdup(nla[NFTA_CHAIN_USERDATA], GFP_KERNEL_ACCOUNT);
if (chain->udata == NULL) {
err = -ENOMEM;
goto err_destroy_chain;
@@ -2178,15 +2292,15 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
chain->udlen = nla_len(nla[NFTA_CHAIN_USERDATA]);
}
- rules = nf_tables_chain_alloc_rules(chain, 0);
- if (!rules) {
+ data_size = offsetof(struct nft_rule_dp, data); /* last rule */
+ blob = nf_tables_chain_alloc_rules(data_size);
+ if (!blob) {
err = -ENOMEM;
goto err_destroy_chain;
}
- *rules = NULL;
- rcu_assign_pointer(chain->rules_gen_0, rules);
- rcu_assign_pointer(chain->rules_gen_1, rules);
+ RCU_INIT_POINTER(chain->blob_gen_0, blob);
+ RCU_INIT_POINTER(chain->blob_gen_1, blob);
err = nf_tables_register_hook(net, table, chain);
if (err < 0)
@@ -2333,7 +2447,7 @@ static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
char *name;
err = -ENOMEM;
- name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL);
+ name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
if (!name)
goto err;
@@ -2362,6 +2476,7 @@ err:
}
static struct nft_chain *nft_chain_lookup_byid(const struct net *net,
+ const struct nft_table *table,
const struct nlattr *nla)
{
struct nftables_pernet *nft_net = nft_pernet(net);
@@ -2372,6 +2487,7 @@ static struct nft_chain *nft_chain_lookup_byid(const struct net *net,
struct nft_chain *chain = trans->ctx.chain;
if (trans->msg_type == NFT_MSG_NEWCHAIN &&
+ chain->table == table &&
id == nft_trans_chain_id(trans))
return chain;
}
@@ -2461,6 +2577,9 @@ static int nf_tables_newchain(struct sk_buff *skb, const struct nfnl_info *info,
nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
if (chain != NULL) {
+ if (chain->flags & NFT_CHAIN_BINDING)
+ return -EINVAL;
+
if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
NL_SET_BAD_ATTR(extack, attr);
return -EEXIST;
@@ -2778,27 +2897,31 @@ static struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
err = nf_tables_expr_parse(ctx, nla, &expr_info);
if (err < 0)
- goto err1;
+ goto err_expr_parse;
+
+ err = -EOPNOTSUPP;
+ if (!(expr_info.ops->type->flags & NFT_EXPR_STATEFUL))
+ goto err_expr_stateful;
err = -ENOMEM;
- expr = kzalloc(expr_info.ops->size, GFP_KERNEL);
+ expr = kzalloc(expr_info.ops->size, GFP_KERNEL_ACCOUNT);
if (expr == NULL)
- goto err2;
+ goto err_expr_stateful;
err = nf_tables_newexpr(ctx, &expr_info, expr);
if (err < 0)
- goto err3;
+ goto err_expr_new;
return expr;
-err3:
+err_expr_new:
kfree(expr);
-err2:
+err_expr_stateful:
owner = expr_info.ops->type->owner;
if (expr_info.ops->type->release_ops)
expr_info.ops->type->release_ops(expr_info.ops);
module_put(owner);
-err1:
+err_expr_parse:
return ERR_PTR(err);
}
@@ -3032,7 +3155,7 @@ static int nf_tables_dump_rules(struct sk_buff *skb,
rcu_read_lock();
nft_net = nft_pernet(net);
- cb->seq = nft_net->base_seq;
+ cb->seq = READ_ONCE(nft_net->base_seq);
list_for_each_entry_rcu(table, &nft_net->tables, list) {
if (family != NFPROTO_UNSPEC && family != table->family)
@@ -3226,6 +3349,8 @@ int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain)
if (err < 0)
return err;
}
+
+ cond_resched();
}
return 0;
@@ -3255,6 +3380,7 @@ static int nft_table_validate(struct net *net, const struct nft_table *table)
}
static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
+ const struct nft_chain *chain,
const struct nlattr *nla);
#define NFT_RULE_MAXEXPRS 128
@@ -3301,7 +3427,7 @@ static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
return -EOPNOTSUPP;
} else if (nla[NFTA_RULE_CHAIN_ID]) {
- chain = nft_chain_lookup_byid(net, nla[NFTA_RULE_CHAIN_ID]);
+ chain = nft_chain_lookup_byid(net, table, nla[NFTA_RULE_CHAIN_ID]);
if (IS_ERR(chain)) {
NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN_ID]);
return PTR_ERR(chain);
@@ -3343,7 +3469,7 @@ static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
return PTR_ERR(old_rule);
}
} else if (nla[NFTA_RULE_POSITION_ID]) {
- old_rule = nft_rule_lookup_byid(net, nla[NFTA_RULE_POSITION_ID]);
+ old_rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_POSITION_ID]);
if (IS_ERR(old_rule)) {
NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION_ID]);
return PTR_ERR(old_rule);
@@ -3389,7 +3515,7 @@ static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
}
err = -ENOMEM;
- rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL);
+ rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL_ACCOUNT);
if (rule == NULL)
goto err_release_expr;
@@ -3488,6 +3614,7 @@ err_release_expr:
}
static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
+ const struct nft_chain *chain,
const struct nlattr *nla)
{
struct nftables_pernet *nft_net = nft_pernet(net);
@@ -3498,6 +3625,7 @@ static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
struct nft_rule *rule = nft_trans_rule(trans);
if (trans->msg_type == NFT_MSG_NEWRULE &&
+ trans->ctx.chain == chain &&
id == nft_trans_rule_id(trans))
return rule;
}
@@ -3547,7 +3675,7 @@ static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
err = nft_delrule(&ctx, rule);
} else if (nla[NFTA_RULE_ID]) {
- rule = nft_rule_lookup_byid(net, nla[NFTA_RULE_ID]);
+ rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_ID]);
if (IS_ERR(rule)) {
NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_ID]);
return PTR_ERR(rule);
@@ -3726,6 +3854,7 @@ static struct nft_set *nft_set_lookup_byhandle(const struct nft_table *table,
}
static struct nft_set *nft_set_lookup_byid(const struct net *net,
+ const struct nft_table *table,
const struct nlattr *nla, u8 genmask)
{
struct nftables_pernet *nft_net = nft_pernet(net);
@@ -3737,6 +3866,7 @@ static struct nft_set *nft_set_lookup_byid(const struct net *net,
struct nft_set *set = nft_trans_set(trans);
if (id == nft_trans_set_id(trans) &&
+ set->table == table &&
nft_active_genmask(set, genmask))
return set;
}
@@ -3757,7 +3887,7 @@ struct nft_set *nft_set_lookup_global(const struct net *net,
if (!nla_set_id)
return set;
- set = nft_set_lookup_byid(net, nla_set_id, genmask);
+ set = nft_set_lookup_byid(net, table, nla_set_id, genmask);
}
return set;
}
@@ -3783,7 +3913,7 @@ cont:
list_for_each_entry(i, &ctx->table->sets, list) {
int tmp;
- if (!nft_is_active_next(ctx->net, set))
+ if (!nft_is_active_next(ctx->net, i))
continue;
if (!sscanf(i->name, name, &tmp))
continue;
@@ -3802,7 +3932,7 @@ cont:
free_page((unsigned long)inuse);
}
- set->name = kasprintf(GFP_KERNEL, name, min + n);
+ set->name = kasprintf(GFP_KERNEL_ACCOUNT, name, min + n);
if (!set->name)
return -ENOMEM;
@@ -4009,7 +4139,7 @@ static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
rcu_read_lock();
nft_net = nft_pernet(net);
- cb->seq = nft_net->base_seq;
+ cb->seq = READ_ONCE(nft_net->base_seq);
list_for_each_entry_rcu(table, &nft_net->tables, list) {
if (ctx->family != NFPROTO_UNSPEC &&
@@ -4147,6 +4277,9 @@ static int nft_set_desc_concat_parse(const struct nlattr *attr,
u32 len;
int err;
+ if (desc->field_count >= ARRAY_SIZE(desc->field_len))
+ return -E2BIG;
+
err = nla_parse_nested_deprecated(tb, NFTA_SET_FIELD_MAX, attr,
nft_concat_policy, NULL);
if (err < 0)
@@ -4156,9 +4289,8 @@ static int nft_set_desc_concat_parse(const struct nlattr *attr,
return -EINVAL;
len = ntohl(nla_get_be32(tb[NFTA_SET_FIELD_LEN]));
-
- if (len * BITS_PER_BYTE / 32 > NFT_REG32_COUNT)
- return -E2BIG;
+ if (!len || len > U8_MAX)
+ return -EINVAL;
desc->field_len[desc->field_count++] = len;
@@ -4169,7 +4301,8 @@ static int nft_set_desc_concat(struct nft_set_desc *desc,
const struct nlattr *nla)
{
struct nlattr *attr;
- int rem, err;
+ u32 num_regs = 0;
+ int rem, err, i;
nla_for_each_nested(attr, nla, rem) {
if (nla_type(attr) != NFTA_LIST_ELEM)
@@ -4180,6 +4313,12 @@ static int nft_set_desc_concat(struct nft_set_desc *desc,
return err;
}
+ for (i = 0; i < desc->field_count; i++)
+ num_regs += DIV_ROUND_UP(desc->field_len[i], sizeof(u32));
+
+ if (num_regs > NFT_REG32_COUNT)
+ return -E2BIG;
+
return 0;
}
@@ -4318,6 +4457,11 @@ static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
err = nf_tables_set_desc_parse(&desc, nla[NFTA_SET_DESC]);
if (err < 0)
return err;
+
+ if (desc.field_count > 1 && !(flags & NFT_SET_CONCAT))
+ return -EINVAL;
+ } else if (flags & NFT_SET_CONCAT) {
+ return -EINVAL;
}
if (nla[NFTA_SET_EXPR] || nla[NFTA_SET_EXPRESSIONS])
@@ -4366,11 +4510,11 @@ static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
alloc_size = sizeof(*set) + size + udlen;
if (alloc_size < size || alloc_size > INT_MAX)
return -ENOMEM;
- set = kvzalloc(alloc_size, GFP_KERNEL);
+ set = kvzalloc(alloc_size, GFP_KERNEL_ACCOUNT);
if (!set)
return -ENOMEM;
- name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL);
+ name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL_ACCOUNT);
if (!name) {
err = -ENOMEM;
goto err_set_name;
@@ -4481,12 +4625,12 @@ struct nft_set_elem_catchall {
static void nft_set_catchall_destroy(const struct nft_ctx *ctx,
struct nft_set *set)
{
- struct nft_set_elem_catchall *catchall;
+ struct nft_set_elem_catchall *next, *catchall;
- list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
+ list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
list_del_rcu(&catchall->list);
nft_set_elem_destroy(set, catchall->elem, true);
- kfree_rcu(catchall);
+ kfree_rcu(catchall, rcu);
}
}
@@ -4928,6 +5072,8 @@ static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
rcu_read_lock();
nft_net = nft_pernet(net);
+ cb->seq = READ_ONCE(nft_net->base_seq);
+
list_for_each_entry_rcu(table, &nft_net->tables, list) {
if (dump_ctx->ctx.family != NFPROTO_UNSPEC &&
dump_ctx->ctx.family != table->family)
@@ -5063,6 +5209,9 @@ static int nft_setelem_parse_flags(const struct nft_set *set,
if (!(set->flags & NFT_SET_INTERVAL) &&
*flags & NFT_SET_ELEM_INTERVAL_END)
return -EINVAL;
+ if ((*flags & (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL)) ==
+ (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
+ return -EINVAL;
return 0;
}
@@ -5070,19 +5219,13 @@ static int nft_setelem_parse_flags(const struct nft_set *set,
static int nft_setelem_parse_key(struct nft_ctx *ctx, struct nft_set *set,
struct nft_data *key, struct nlattr *attr)
{
- struct nft_data_desc desc;
- int err;
-
- err = nft_data_init(ctx, key, NFT_DATA_VALUE_MAXLEN, &desc, attr);
- if (err < 0)
- return err;
-
- if (desc.type != NFT_DATA_VALUE || desc.len != set->klen) {
- nft_data_release(key, desc.type);
- return -EINVAL;
- }
+ struct nft_data_desc desc = {
+ .type = NFT_DATA_VALUE,
+ .size = NFT_DATA_VALUE_MAXLEN,
+ .len = set->klen,
+ };
- return 0;
+ return nft_data_init(ctx, key, &desc, attr);
}
static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set,
@@ -5090,18 +5233,19 @@ static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set,
struct nft_data *data,
struct nlattr *attr)
{
- int err;
+ u32 dtype;
- err = nft_data_init(ctx, data, NFT_DATA_VALUE_MAXLEN, desc, attr);
- if (err < 0)
- return err;
+ if (set->dtype == NFT_DATA_VERDICT)
+ dtype = NFT_DATA_VERDICT;
+ else
+ dtype = NFT_DATA_VALUE;
- if (desc->type != NFT_DATA_VERDICT && desc->len != set->dlen) {
- nft_data_release(data, desc->type);
- return -EINVAL;
- }
+ desc->type = dtype;
+ desc->size = NFT_DATA_VALUE_MAXLEN;
+ desc->len = set->dlen;
+ desc->flags = NFT_DATA_DESC_SETELEM;
- return 0;
+ return nft_data_init(ctx, data, desc, attr);
}
static void *nft_setelem_catchall_get(const struct net *net,
@@ -5249,8 +5393,10 @@ static int nf_tables_getsetelem(struct sk_buff *skb,
nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
err = nft_get_set_elem(&ctx, set, attr);
- if (err < 0)
+ if (err < 0) {
+ NL_SET_BAD_ATTR(extack, attr);
break;
+ }
}
return err;
@@ -5318,9 +5464,6 @@ struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx,
return expr;
err = -EOPNOTSUPP;
- if (!(expr->ops->type->flags & NFT_EXPR_STATEFUL))
- goto err_set_elem_expr;
-
if (expr->ops->type->flags & NFT_EXPR_GC) {
if (set->flags & NFT_SET_TIMEOUT)
goto err_set_elem_expr;
@@ -5336,6 +5479,27 @@ err_set_elem_expr:
return ERR_PTR(err);
}
+static int nft_set_ext_check(const struct nft_set_ext_tmpl *tmpl, u8 id, u32 len)
+{
+ len += nft_set_ext_types[id].len;
+ if (len > tmpl->ext_len[id] ||
+ len > U8_MAX)
+ return -1;
+
+ return 0;
+}
+
+static int nft_set_ext_memcpy(const struct nft_set_ext_tmpl *tmpl, u8 id,
+ void *to, const void *from, u32 len)
+{
+ if (nft_set_ext_check(tmpl, id, len) < 0)
+ return -1;
+
+ memcpy(to, from, len);
+
+ return 0;
+}
+
void *nft_set_elem_init(const struct nft_set *set,
const struct nft_set_ext_tmpl *tmpl,
const u32 *key, const u32 *key_end,
@@ -5346,17 +5510,26 @@ void *nft_set_elem_init(const struct nft_set *set,
elem = kzalloc(set->ops->elemsize + tmpl->len, gfp);
if (elem == NULL)
- return NULL;
+ return ERR_PTR(-ENOMEM);
ext = nft_set_elem_ext(set, elem);
nft_set_ext_init(ext, tmpl);
- if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY))
- memcpy(nft_set_ext_key(ext), key, set->klen);
- if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END))
- memcpy(nft_set_ext_key_end(ext), key_end, set->klen);
- if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
- memcpy(nft_set_ext_data(ext), data, set->dlen);
+ if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
+ nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY,
+ nft_set_ext_key(ext), key, set->klen) < 0)
+ goto err_ext_check;
+
+ if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
+ nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY_END,
+ nft_set_ext_key_end(ext), key_end, set->klen) < 0)
+ goto err_ext_check;
+
+ if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
+ nft_set_ext_memcpy(tmpl, NFT_SET_EXT_DATA,
+ nft_set_ext_data(ext), data, set->dlen) < 0)
+ goto err_ext_check;
+
if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
*nft_set_ext_expiration(ext) = get_jiffies_64() + expiration;
if (expiration == 0)
@@ -5366,6 +5539,11 @@ void *nft_set_elem_init(const struct nft_set *set,
*nft_set_ext_timeout(ext) = timeout;
return elem;
+
+err_ext_check:
+ kfree(elem);
+
+ return ERR_PTR(-EINVAL);
}
static void __nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
@@ -5431,13 +5609,13 @@ int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
int err, i, k;
for (i = 0; i < set->num_exprs; i++) {
- expr = kzalloc(set->exprs[i]->ops->size, GFP_KERNEL);
+ expr = kzalloc(set->exprs[i]->ops->size, GFP_KERNEL_ACCOUNT);
if (!expr)
goto err_expr;
err = nft_expr_clone(expr, set->exprs[i]);
if (err < 0) {
- nft_expr_destroy(ctx, expr);
+ kfree(expr);
goto err_expr;
}
expr_array[i] = expr;
@@ -5453,14 +5631,25 @@ err_expr:
}
static int nft_set_elem_expr_setup(struct nft_ctx *ctx,
+ const struct nft_set_ext_tmpl *tmpl,
const struct nft_set_ext *ext,
struct nft_expr *expr_array[],
u32 num_exprs)
{
struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext);
+ u32 len = sizeof(struct nft_set_elem_expr);
struct nft_expr *expr;
int i, err;
+ if (num_exprs == 0)
+ return 0;
+
+ for (i = 0; i < num_exprs; i++)
+ len += expr_array[i]->ops->size;
+
+ if (nft_set_ext_check(tmpl, NFT_SET_EXT_EXPRESSIONS, len) < 0)
+ return -EINVAL;
+
for (i = 0; i < num_exprs; i++) {
expr = nft_setelem_expr_at(elem_expr, elem_expr->size);
err = nft_expr_clone(expr, expr_array[i]);
@@ -5653,7 +5842,7 @@ static void nft_setelem_catchall_remove(const struct net *net,
list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
if (catchall->elem == elem->priv) {
list_del_rcu(&catchall->list);
- kfree_rcu(catchall);
+ kfree_rcu(catchall, rcu);
break;
}
}
@@ -5669,6 +5858,25 @@ static void nft_setelem_remove(const struct net *net,
set->ops->remove(net, set, elem);
}
+static bool nft_setelem_valid_key_end(const struct nft_set *set,
+ struct nlattr **nla, u32 flags)
+{
+ if ((set->flags & (NFT_SET_CONCAT | NFT_SET_INTERVAL)) ==
+ (NFT_SET_CONCAT | NFT_SET_INTERVAL)) {
+ if (flags & NFT_SET_ELEM_INTERVAL_END)
+ return false;
+
+ if (nla[NFTA_SET_ELEM_KEY_END] &&
+ flags & NFT_SET_ELEM_CATCHALL)
+ return false;
+ } else {
+ if (nla[NFTA_SET_ELEM_KEY_END])
+ return false;
+ }
+
+ return true;
+}
+
static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
const struct nlattr *attr, u32 nlmsg_flags)
{
@@ -5704,8 +5912,11 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
return -EINVAL;
- if (flags != 0)
- nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
+ if (flags != 0) {
+ err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
+ if (err < 0)
+ return err;
+ }
if (set->flags & NFT_SET_MAP) {
if (nla[NFTA_SET_ELEM_DATA] == NULL &&
@@ -5716,6 +5927,18 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
return -EINVAL;
}
+ if (set->flags & NFT_SET_OBJECT) {
+ if (!nla[NFTA_SET_ELEM_OBJREF] &&
+ !(flags & NFT_SET_ELEM_INTERVAL_END))
+ return -EINVAL;
+ } else {
+ if (nla[NFTA_SET_ELEM_OBJREF])
+ return -EINVAL;
+ }
+
+ if (!nft_setelem_valid_key_end(set, nla, flags))
+ return -EINVAL;
+
if ((flags & NFT_SET_ELEM_INTERVAL_END) &&
(nla[NFTA_SET_ELEM_DATA] ||
nla[NFTA_SET_ELEM_OBJREF] ||
@@ -5723,6 +5946,7 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
nla[NFTA_SET_ELEM_EXPIRATION] ||
nla[NFTA_SET_ELEM_USERDATA] ||
nla[NFTA_SET_ELEM_EXPR] ||
+ nla[NFTA_SET_ELEM_KEY_END] ||
nla[NFTA_SET_ELEM_EXPRESSIONS]))
return -EINVAL;
@@ -5814,7 +6038,9 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
if (err < 0)
goto err_set_elem_expr;
- nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
+ err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
+ if (err < 0)
+ goto err_parse_key;
}
if (nla[NFTA_SET_ELEM_KEY_END]) {
@@ -5823,29 +6049,34 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
if (err < 0)
goto err_parse_key;
- nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
+ err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
+ if (err < 0)
+ goto err_parse_key_end;
}
if (timeout > 0) {
- nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
- if (timeout != set->timeout)
- nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
+ err = nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
+ if (err < 0)
+ goto err_parse_key_end;
+
+ if (timeout != set->timeout) {
+ err = nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
+ if (err < 0)
+ goto err_parse_key_end;
+ }
}
if (num_exprs) {
for (i = 0; i < num_exprs; i++)
size += expr_array[i]->ops->size;
- nft_set_ext_add_length(&tmpl, NFT_SET_EXT_EXPRESSIONS,
- sizeof(struct nft_set_elem_expr) +
- size);
+ err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_EXPRESSIONS,
+ sizeof(struct nft_set_elem_expr) + size);
+ if (err < 0)
+ goto err_parse_key_end;
}
if (nla[NFTA_SET_ELEM_OBJREF] != NULL) {
- if (!(set->flags & NFT_SET_OBJECT)) {
- err = -EINVAL;
- goto err_parse_key_end;
- }
obj = nft_obj_lookup(ctx->net, ctx->table,
nla[NFTA_SET_ELEM_OBJREF],
set->objtype, genmask);
@@ -5853,7 +6084,9 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
err = PTR_ERR(obj);
goto err_parse_key_end;
}
- nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF);
+ err = nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF);
+ if (err < 0)
+ goto err_parse_key_end;
}
if (nla[NFTA_SET_ELEM_DATA] != NULL) {
@@ -5887,7 +6120,9 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
NFT_VALIDATE_NEED);
}
- nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, desc.len);
+ err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, desc.len);
+ if (err < 0)
+ goto err_parse_data;
}
/* The full maximum length of userdata can exceed the maximum
@@ -5897,22 +6132,31 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
ulen = 0;
if (nla[NFTA_SET_ELEM_USERDATA] != NULL) {
ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]);
- if (ulen > 0)
- nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA,
- ulen);
+ if (ulen > 0) {
+ err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA,
+ ulen);
+ if (err < 0)
+ goto err_parse_data;
+ }
}
- err = -ENOMEM;
elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
elem.key_end.val.data, elem.data.val.data,
- timeout, expiration, GFP_KERNEL);
- if (elem.priv == NULL)
+ timeout, expiration, GFP_KERNEL_ACCOUNT);
+ if (IS_ERR(elem.priv)) {
+ err = PTR_ERR(elem.priv);
goto err_parse_data;
+ }
ext = nft_set_elem_ext(set, elem.priv);
if (flags)
*nft_set_ext_flags(ext) = flags;
+
if (ulen > 0) {
+ if (nft_set_ext_check(&tmpl, NFT_SET_EXT_USERDATA, ulen) < 0) {
+ err = -EINVAL;
+ goto err_elem_userdata;
+ }
udata = nft_set_ext_userdata(ext);
udata->len = ulen - 1;
nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen);
@@ -5921,14 +6165,14 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
*nft_set_ext_obj(ext) = obj;
obj->use++;
}
- err = nft_set_elem_expr_setup(ctx, ext, expr_array, num_exprs);
+ err = nft_set_elem_expr_setup(ctx, &tmpl, ext, expr_array, num_exprs);
if (err < 0)
- goto err_elem_expr;
+ goto err_elem_free;
trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
if (trans == NULL) {
err = -ENOMEM;
- goto err_elem_expr;
+ goto err_elem_free;
}
ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK;
@@ -5974,10 +6218,10 @@ err_set_full:
nft_setelem_remove(ctx->net, set, &elem);
err_element_clash:
kfree(trans);
-err_elem_expr:
+err_elem_free:
if (obj)
obj->use--;
-
+err_elem_userdata:
nf_tables_set_elem_destroy(ctx, set, elem.priv);
err_parse_data:
if (nla[NFTA_SET_ELEM_DATA] != NULL)
@@ -6030,8 +6274,10 @@ static int nf_tables_newsetelem(struct sk_buff *skb,
nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
err = nft_add_set_elem(&ctx, set, attr, info->nlh->nlmsg_flags);
- if (err < 0)
+ if (err < 0) {
+ NL_SET_BAD_ATTR(extack, attr);
return err;
+ }
}
if (nft_net->validate_state == NFT_VALIDATE_DO)
@@ -6123,10 +6369,16 @@ static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
return -EINVAL;
+ if (!nft_setelem_valid_key_end(set, nla, flags))
+ return -EINVAL;
+
nft_set_ext_prepare(&tmpl);
- if (flags != 0)
- nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
+ if (flags != 0) {
+ err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
+ if (err < 0)
+ return err;
+ }
if (nla[NFTA_SET_ELEM_KEY]) {
err = nft_setelem_parse_key(ctx, set, &elem.key.val,
@@ -6134,24 +6386,30 @@ static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
if (err < 0)
return err;
- nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
+ err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
+ if (err < 0)
+ goto fail_elem;
}
if (nla[NFTA_SET_ELEM_KEY_END]) {
err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
nla[NFTA_SET_ELEM_KEY_END]);
if (err < 0)
- return err;
+ goto fail_elem;
- nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
+ err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
+ if (err < 0)
+ goto fail_elem_key_end;
}
err = -ENOMEM;
elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
elem.key_end.val.data, NULL, 0, 0,
- GFP_KERNEL);
- if (elem.priv == NULL)
- goto fail_elem;
+ GFP_KERNEL_ACCOUNT);
+ if (IS_ERR(elem.priv)) {
+ err = PTR_ERR(elem.priv);
+ goto fail_elem_key_end;
+ }
ext = nft_set_elem_ext(set, elem.priv);
if (flags)
@@ -6175,6 +6433,8 @@ fail_ops:
kfree(trans);
fail_trans:
kfree(elem.priv);
+fail_elem_key_end:
+ nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
fail_elem:
nft_data_release(&elem.key.val, NFT_DATA_VALUE);
return err;
@@ -6301,8 +6561,10 @@ static int nf_tables_delsetelem(struct sk_buff *skb,
nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
err = nft_del_setelem(&ctx, set, attr);
- if (err < 0)
+ if (err < 0) {
+ NL_SET_BAD_ATTR(extack, attr);
break;
+ }
}
return err;
}
@@ -6461,7 +6723,7 @@ static struct nft_object *nft_obj_init(const struct nft_ctx *ctx,
}
err = -ENOMEM;
- obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL);
+ obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL_ACCOUNT);
if (!obj)
goto err2;
@@ -6535,12 +6797,15 @@ static int nf_tables_updobj(const struct nft_ctx *ctx,
{
struct nft_object *newobj;
struct nft_trans *trans;
- int err;
+ int err = -ENOMEM;
+
+ if (!try_module_get(type->owner))
+ return -ENOENT;
trans = nft_trans_alloc(ctx, NFT_MSG_NEWOBJ,
sizeof(struct nft_trans_obj));
if (!trans)
- return -ENOMEM;
+ goto err_trans;
newobj = nft_obj_init(ctx, type, attr);
if (IS_ERR(newobj)) {
@@ -6557,6 +6822,8 @@ static int nf_tables_updobj(const struct nft_ctx *ctx,
err_free_trans:
kfree(trans);
+err_trans:
+ module_put(type->owner);
return err;
}
@@ -6622,7 +6889,7 @@ static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
obj->key.table = table;
obj->handle = nf_tables_alloc_handle(table);
- obj->key.name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL);
+ obj->key.name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL_ACCOUNT);
if (!obj->key.name) {
err = -ENOMEM;
goto err_strdup;
@@ -6721,7 +6988,7 @@ static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb)
rcu_read_lock();
nft_net = nft_pernet(net);
- cb->seq = nft_net->base_seq;
+ cb->seq = READ_ONCE(nft_net->base_seq);
list_for_each_entry_rcu(table, &nft_net->tables, list) {
if (family != NFPROTO_UNSPEC && family != table->family)
@@ -7191,13 +7458,25 @@ static void nft_unregister_flowtable_hook(struct net *net,
FLOW_BLOCK_UNBIND);
}
-static void nft_unregister_flowtable_net_hooks(struct net *net,
- struct list_head *hook_list)
+static void __nft_unregister_flowtable_net_hooks(struct net *net,
+ struct list_head *hook_list,
+ bool release_netdev)
{
- struct nft_hook *hook;
+ struct nft_hook *hook, *next;
- list_for_each_entry(hook, hook_list, list)
+ list_for_each_entry_safe(hook, next, hook_list, list) {
nf_unregister_net_hook(net, &hook->ops);
+ if (release_netdev) {
+ list_del(&hook->list);
+ kfree_rcu(hook, rcu);
+ }
+ }
+}
+
+static void nft_unregister_flowtable_net_hooks(struct net *net,
+ struct list_head *hook_list)
+{
+ __nft_unregister_flowtable_net_hooks(net, hook_list, false);
}
static int nft_register_flowtable_net_hooks(struct net *net,
@@ -7290,11 +7569,15 @@ 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 (flags & ~NFT_FLOWTABLE_MASK) {
+ err = -EOPNOTSUPP;
+ goto err_flowtable_update_hook;
+ }
if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^
- (flags & NFT_FLOWTABLE_HW_OFFLOAD))
- return -EOPNOTSUPP;
+ (flags & NFT_FLOWTABLE_HW_OFFLOAD)) {
+ err = -EOPNOTSUPP;
+ goto err_flowtable_update_hook;
+ }
} else {
flags = flowtable->data.flags;
}
@@ -7383,7 +7666,7 @@ static int nf_tables_newflowtable(struct sk_buff *skb,
nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
- flowtable = kzalloc(sizeof(*flowtable), GFP_KERNEL);
+ flowtable = kzalloc(sizeof(*flowtable), GFP_KERNEL_ACCOUNT);
if (!flowtable)
return -ENOMEM;
@@ -7391,7 +7674,7 @@ static int nf_tables_newflowtable(struct sk_buff *skb,
flowtable->handle = nf_tables_alloc_handle(table);
INIT_LIST_HEAD(&flowtable->hook_list);
- flowtable->name = nla_strdup(nla[NFTA_FLOWTABLE_NAME], GFP_KERNEL);
+ flowtable->name = nla_strdup(nla[NFTA_FLOWTABLE_NAME], GFP_KERNEL_ACCOUNT);
if (!flowtable->name) {
err = -ENOMEM;
goto err1;
@@ -7475,6 +7758,7 @@ static int nft_delflowtable_hook(struct nft_ctx *ctx,
{
const struct nlattr * const *nla = ctx->nla;
struct nft_flowtable_hook flowtable_hook;
+ LIST_HEAD(flowtable_del_list);
struct nft_hook *this, *hook;
struct nft_trans *trans;
int err;
@@ -7490,7 +7774,7 @@ static int nft_delflowtable_hook(struct nft_ctx *ctx,
err = -ENOENT;
goto err_flowtable_del_hook;
}
- hook->inactive = true;
+ list_move(&hook->list, &flowtable_del_list);
}
trans = nft_trans_alloc(ctx, NFT_MSG_DELFLOWTABLE,
@@ -7503,6 +7787,7 @@ static int nft_delflowtable_hook(struct nft_ctx *ctx,
nft_trans_flowtable(trans) = flowtable;
nft_trans_flowtable_update(trans) = true;
INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
+ list_splice(&flowtable_del_list, &nft_trans_flowtable_hooks(trans));
nft_flowtable_hook_release(&flowtable_hook);
nft_trans_commit_list_add_tail(ctx->net, trans);
@@ -7510,13 +7795,7 @@ static int nft_delflowtable_hook(struct nft_ctx *ctx,
return 0;
err_flowtable_del_hook:
- list_for_each_entry(this, &flowtable_hook.list, list) {
- hook = nft_hook_list_find(&flowtable->hook_list, this);
- if (!hook)
- break;
-
- hook->inactive = false;
- }
+ list_splice(&flowtable_del_list, &flowtable->hook_list);
nft_flowtable_hook_release(&flowtable_hook);
return err;
@@ -7641,7 +7920,7 @@ static int nf_tables_dump_flowtable(struct sk_buff *skb,
rcu_read_lock();
nft_net = nft_pernet(net);
- cb->seq = nft_net->base_seq;
+ cb->seq = READ_ONCE(nft_net->base_seq);
list_for_each_entry_rcu(table, &nft_net->tables, list) {
if (family != NFPROTO_UNSPEC && family != table->family)
@@ -8169,7 +8448,7 @@ static void nft_obj_commit_update(struct nft_trans *trans)
if (obj->ops->update)
obj->ops->update(obj, newobj);
- kfree(newobj);
+ nft_obj_destroy(&trans->ctx, newobj);
}
static void nft_commit_release(struct nft_trans *trans)
@@ -8239,34 +8518,87 @@ void nf_tables_trans_destroy_flush_work(void)
}
EXPORT_SYMBOL_GPL(nf_tables_trans_destroy_flush_work);
+static bool nft_expr_reduce(struct nft_regs_track *track,
+ const struct nft_expr *expr)
+{
+ return false;
+}
+
static int nf_tables_commit_chain_prepare(struct net *net, struct nft_chain *chain)
{
+ const struct nft_expr *expr, *last;
+ struct nft_regs_track track = {};
+ unsigned int size, data_size;
+ void *data, *data_boundary;
+ struct nft_rule_dp *prule;
struct nft_rule *rule;
- unsigned int alloc = 0;
- int i;
/* already handled or inactive chain? */
- if (chain->rules_next || !nft_is_active_next(net, chain))
+ if (chain->blob_next || !nft_is_active_next(net, chain))
return 0;
- rule = list_entry(&chain->rules, struct nft_rule, list);
- i = 0;
-
- list_for_each_entry_continue(rule, &chain->rules, list) {
- if (nft_is_active_next(net, rule))
- alloc++;
+ data_size = 0;
+ list_for_each_entry(rule, &chain->rules, list) {
+ if (nft_is_active_next(net, rule)) {
+ data_size += sizeof(*prule) + rule->dlen;
+ if (data_size > INT_MAX)
+ return -ENOMEM;
+ }
}
+ data_size += offsetof(struct nft_rule_dp, data); /* last rule */
- chain->rules_next = nf_tables_chain_alloc_rules(chain, alloc);
- if (!chain->rules_next)
+ chain->blob_next = nf_tables_chain_alloc_rules(data_size);
+ if (!chain->blob_next)
return -ENOMEM;
- list_for_each_entry_continue(rule, &chain->rules, list) {
- if (nft_is_active_next(net, rule))
- chain->rules_next[i++] = rule;
+ data = (void *)chain->blob_next->data;
+ data_boundary = data + data_size;
+ size = 0;
+
+ list_for_each_entry(rule, &chain->rules, list) {
+ if (!nft_is_active_next(net, rule))
+ continue;
+
+ prule = (struct nft_rule_dp *)data;
+ data += offsetof(struct nft_rule_dp, data);
+ if (WARN_ON_ONCE(data > data_boundary))
+ return -ENOMEM;
+
+ size = 0;
+ track.last = nft_expr_last(rule);
+ nft_rule_for_each_expr(expr, last, rule) {
+ track.cur = expr;
+
+ if (nft_expr_reduce(&track, expr)) {
+ expr = track.cur;
+ continue;
+ }
+
+ if (WARN_ON_ONCE(data + expr->ops->size > data_boundary))
+ return -ENOMEM;
+
+ memcpy(data + size, expr, expr->ops->size);
+ size += expr->ops->size;
+ }
+ if (WARN_ON_ONCE(size >= 1 << 12))
+ return -ENOMEM;
+
+ prule->handle = rule->handle;
+ prule->dlen = size;
+ prule->is_last = 0;
+
+ data += size;
+ size = 0;
+ chain->blob_next->size += (unsigned long)(data - (void *)prule);
}
- chain->rules_next[i] = NULL;
+ prule = (struct nft_rule_dp *)data;
+ data += offsetof(struct nft_rule_dp, data);
+ if (WARN_ON_ONCE(data > data_boundary))
+ return -ENOMEM;
+
+ nft_last_rule(chain->blob_next, prule);
+
return 0;
}
@@ -8280,8 +8612,8 @@ static void nf_tables_commit_chain_prepare_cancel(struct net *net)
if (trans->msg_type == NFT_MSG_NEWRULE ||
trans->msg_type == NFT_MSG_DELRULE) {
- kvfree(chain->rules_next);
- chain->rules_next = NULL;
+ kvfree(chain->blob_next);
+ chain->blob_next = NULL;
}
}
}
@@ -8290,38 +8622,34 @@ static void __nf_tables_commit_chain_free_rules_old(struct rcu_head *h)
{
struct nft_rules_old *o = container_of(h, struct nft_rules_old, h);
- kvfree(o->start);
+ kvfree(o->blob);
}
-static void nf_tables_commit_chain_free_rules_old(struct nft_rule **rules)
+static void nf_tables_commit_chain_free_rules_old(struct nft_rule_blob *blob)
{
- struct nft_rule **r = rules;
struct nft_rules_old *old;
- while (*r)
- r++;
-
- r++; /* rcu_head is after end marker */
- old = (void *) r;
- old->start = rules;
+ /* rcu_head is after end marker */
+ old = (void *)blob + sizeof(*blob) + blob->size;
+ old->blob = blob;
call_rcu(&old->h, __nf_tables_commit_chain_free_rules_old);
}
static void nf_tables_commit_chain(struct net *net, struct nft_chain *chain)
{
- struct nft_rule **g0, **g1;
+ struct nft_rule_blob *g0, *g1;
bool next_genbit;
next_genbit = nft_gencursor_next(net);
- g0 = rcu_dereference_protected(chain->rules_gen_0,
+ g0 = rcu_dereference_protected(chain->blob_gen_0,
lockdep_commit_lock_is_held(net));
- g1 = rcu_dereference_protected(chain->rules_gen_1,
+ g1 = rcu_dereference_protected(chain->blob_gen_1,
lockdep_commit_lock_is_held(net));
/* No changes to this chain? */
- if (chain->rules_next == NULL) {
+ if (chain->blob_next == NULL) {
/* chain had no change in last or next generation */
if (g0 == g1)
return;
@@ -8330,10 +8658,10 @@ static void nf_tables_commit_chain(struct net *net, struct nft_chain *chain)
* one uses same rules as current generation.
*/
if (next_genbit) {
- rcu_assign_pointer(chain->rules_gen_1, g0);
+ rcu_assign_pointer(chain->blob_gen_1, g0);
nf_tables_commit_chain_free_rules_old(g1);
} else {
- rcu_assign_pointer(chain->rules_gen_0, g1);
+ rcu_assign_pointer(chain->blob_gen_0, g1);
nf_tables_commit_chain_free_rules_old(g0);
}
@@ -8341,11 +8669,11 @@ static void nf_tables_commit_chain(struct net *net, struct nft_chain *chain)
}
if (next_genbit)
- rcu_assign_pointer(chain->rules_gen_1, chain->rules_next);
+ rcu_assign_pointer(chain->blob_gen_1, chain->blob_next);
else
- rcu_assign_pointer(chain->rules_gen_0, chain->rules_next);
+ rcu_assign_pointer(chain->blob_gen_0, chain->blob_next);
- chain->rules_next = NULL;
+ chain->blob_next = NULL;
if (g0 == g1)
return;
@@ -8371,17 +8699,6 @@ void nft_chain_del(struct nft_chain *chain)
list_del_rcu(&chain->list);
}
-static void nft_flowtable_hooks_del(struct nft_flowtable *flowtable,
- struct list_head *hook_list)
-{
- struct nft_hook *hook, *next;
-
- list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
- if (hook->inactive)
- list_move(&hook->list, hook_list);
- }
-}
-
static void nf_tables_module_autoload_cleanup(struct net *net)
{
struct nftables_pernet *nft_net = nft_pernet(net);
@@ -8533,6 +8850,7 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
struct nft_trans_elem *te;
struct nft_chain *chain;
struct nft_table *table;
+ unsigned int base_seq;
LIST_HEAD(adl);
int err;
@@ -8582,9 +8900,12 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
* Bump generation counter, invalidate any dump in progress.
* Cannot fail after this point.
*/
- while (++nft_net->base_seq == 0)
+ base_seq = READ_ONCE(nft_net->base_seq);
+ while (++base_seq == 0)
;
+ WRITE_ONCE(nft_net->base_seq, base_seq);
+
/* step 3. Start new generation, rules_gen_X now in use. */
net->nft.gencursor = nft_gencursor_next(net);
@@ -8636,6 +8957,9 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
nf_tables_rule_notify(&trans->ctx,
nft_trans_rule(trans),
NFT_MSG_NEWRULE);
+ if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
+ nft_flow_rule_destroy(nft_trans_flow_rule(trans));
+
nft_trans_destroy(trans);
break;
case NFT_MSG_DELRULE:
@@ -8646,6 +8970,9 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
nft_rule_expr_deactivate(&trans->ctx,
nft_trans_rule(trans),
NFT_TRANS_COMMIT);
+
+ if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
+ nft_flow_rule_destroy(nft_trans_flow_rule(trans));
break;
case NFT_MSG_NEWSET:
nft_clear(net, nft_trans_set(trans));
@@ -8726,8 +9053,6 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
break;
case NFT_MSG_DELFLOWTABLE:
if (nft_trans_flowtable_update(trans)) {
- nft_flowtable_hooks_del(nft_trans_flowtable(trans),
- &nft_trans_flowtable_hooks(trans));
nf_tables_flowtable_notify(&trans->ctx,
nft_trans_flowtable(trans),
&nft_trans_flowtable_hooks(trans),
@@ -8808,7 +9133,6 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
struct nftables_pernet *nft_net = nft_pernet(net);
struct nft_trans *trans, *next;
struct nft_trans_elem *te;
- struct nft_hook *hook;
if (action == NFNL_ABORT_VALIDATE &&
nf_tables_validate(net) < 0)
@@ -8914,7 +9238,7 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
break;
case NFT_MSG_NEWOBJ:
if (nft_trans_obj_update(trans)) {
- kfree(nft_trans_obj_newobj(trans));
+ nft_obj_destroy(&trans->ctx, nft_trans_obj_newobj(trans));
nft_trans_destroy(trans);
} else {
trans->ctx.table->use--;
@@ -8939,8 +9263,8 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
break;
case NFT_MSG_DELFLOWTABLE:
if (nft_trans_flowtable_update(trans)) {
- list_for_each_entry(hook, &nft_trans_flowtable(trans)->hook_list, list)
- hook->inactive = false;
+ list_splice(&nft_trans_flowtable_hooks(trans),
+ &nft_trans_flowtable(trans)->hook_list);
} else {
trans->ctx.table->use++;
nft_clear(trans->ctx.net, nft_trans_flowtable(trans));
@@ -9203,17 +9527,23 @@ int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
}
EXPORT_SYMBOL_GPL(nft_parse_u32_check);
-static unsigned int nft_parse_register(const struct nlattr *attr)
+static int nft_parse_register(const struct nlattr *attr, u32 *preg)
{
unsigned int reg;
reg = ntohl(nla_get_be32(attr));
switch (reg) {
case NFT_REG_VERDICT...NFT_REG_4:
- return reg * NFT_REG_SIZE / NFT_REG32_SIZE;
+ *preg = reg * NFT_REG_SIZE / NFT_REG32_SIZE;
+ break;
+ case NFT_REG32_00...NFT_REG32_15:
+ *preg = reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
+ break;
default:
- return reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
+ return -ERANGE;
}
+
+ return 0;
}
/**
@@ -9255,7 +9585,10 @@ int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len)
u32 reg;
int err;
- reg = nft_parse_register(attr);
+ err = nft_parse_register(attr, &reg);
+ if (err < 0)
+ return err;
+
err = nft_validate_register_load(reg, len);
if (err < 0)
return err;
@@ -9310,7 +9643,10 @@ int nft_parse_register_store(const struct nft_ctx *ctx,
int err;
u32 reg;
- reg = nft_parse_register(attr);
+ err = nft_parse_register(attr, &reg);
+ if (err < 0)
+ return err;
+
err = nft_validate_register_store(ctx, reg, data, type, len);
if (err < 0)
return err;
@@ -9366,7 +9702,7 @@ static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
tb[NFTA_VERDICT_CHAIN],
genmask);
} else if (tb[NFTA_VERDICT_CHAIN_ID]) {
- chain = nft_chain_lookup_byid(ctx->net,
+ chain = nft_chain_lookup_byid(ctx->net, ctx->table,
tb[NFTA_VERDICT_CHAIN_ID]);
if (IS_ERR(chain))
return PTR_ERR(chain);
@@ -9378,6 +9714,11 @@ static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
return PTR_ERR(chain);
if (nft_is_base_chain(chain))
return -EOPNOTSUPP;
+ if (nft_chain_is_bound(chain))
+ return -EINVAL;
+ if (desc->flags & NFT_DATA_DESC_SETELEM &&
+ chain->flags & NFT_CHAIN_BINDING)
+ return -EINVAL;
chain->use++;
data->verdict.chain = chain;
@@ -9385,7 +9726,7 @@ static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
}
desc->len = sizeof(data->verdict);
- desc->type = NFT_DATA_VERDICT;
+
return 0;
}
@@ -9438,20 +9779,25 @@ nla_put_failure:
}
static int nft_value_init(const struct nft_ctx *ctx,
- struct nft_data *data, unsigned int size,
- struct nft_data_desc *desc, const struct nlattr *nla)
+ struct nft_data *data, struct nft_data_desc *desc,
+ const struct nlattr *nla)
{
unsigned int len;
len = nla_len(nla);
if (len == 0)
return -EINVAL;
- if (len > size)
+ if (len > desc->size)
return -EOVERFLOW;
+ if (desc->len) {
+ if (len != desc->len)
+ return -EINVAL;
+ } else {
+ desc->len = len;
+ }
nla_memcpy(data->data, nla, len);
- desc->type = NFT_DATA_VALUE;
- desc->len = len;
+
return 0;
}
@@ -9471,7 +9817,6 @@ static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
*
* @ctx: context of the expression using the data
* @data: destination struct nft_data
- * @size: maximum data length
* @desc: data description
* @nla: netlink attribute containing data
*
@@ -9481,24 +9826,35 @@ static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
* The caller can indicate that it only wants to accept data of type
* NFT_DATA_VALUE by passing NULL for the ctx argument.
*/
-int nft_data_init(const struct nft_ctx *ctx,
- struct nft_data *data, unsigned int size,
+int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data,
struct nft_data_desc *desc, const struct nlattr *nla)
{
struct nlattr *tb[NFTA_DATA_MAX + 1];
int err;
+ if (WARN_ON_ONCE(!desc->size))
+ return -EINVAL;
+
err = nla_parse_nested_deprecated(tb, NFTA_DATA_MAX, nla,
nft_data_policy, NULL);
if (err < 0)
return err;
- if (tb[NFTA_DATA_VALUE])
- return nft_value_init(ctx, data, size, desc,
- tb[NFTA_DATA_VALUE]);
- if (tb[NFTA_DATA_VERDICT] && ctx != NULL)
- return nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
- return -EINVAL;
+ if (tb[NFTA_DATA_VALUE]) {
+ if (desc->type != NFT_DATA_VALUE)
+ return -EINVAL;
+
+ err = nft_value_init(ctx, data, desc, tb[NFTA_DATA_VALUE]);
+ } else if (tb[NFTA_DATA_VERDICT] && ctx != NULL) {
+ if (desc->type != NFT_DATA_VERDICT)
+ return -EINVAL;
+
+ err = nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
+ } else {
+ err = -EINVAL;
+ }
+
+ return err;
}
EXPORT_SYMBOL_GPL(nft_data_init);
@@ -9574,10 +9930,14 @@ EXPORT_SYMBOL_GPL(__nft_release_basechain);
static void __nft_release_hook(struct net *net, struct nft_table *table)
{
+ struct nft_flowtable *flowtable;
struct nft_chain *chain;
list_for_each_entry(chain, &table->chains, list)
- nf_tables_unregister_hook(net, table, chain);
+ __nf_tables_unregister_hook(net, table, chain, true);
+ list_for_each_entry(flowtable, &table->flowtables, list)
+ __nft_unregister_flowtable_net_hooks(net, &flowtable->hook_list,
+ true);
}
static void __nft_release_hooks(struct net *net)
@@ -9670,6 +10030,8 @@ static int nft_rcv_nl_event(struct notifier_block *this, unsigned long event,
nft_net = nft_pernet(net);
deleted = 0;
mutex_lock(&nft_net->commit_mutex);
+ if (!list_empty(&nf_tables_destroy_list))
+ rcu_barrier();
again:
list_for_each_entry(table, &nft_net->tables, list) {
if (nft_table_has_owner(table) &&
@@ -9716,7 +10078,11 @@ static int __net_init nf_tables_init_net(struct net *net)
static void __net_exit nf_tables_pre_exit_net(struct net *net)
{
+ struct nftables_pernet *nft_net = nft_pernet(net);
+
+ mutex_lock(&nft_net->commit_mutex);
__nft_release_hooks(net);
+ mutex_unlock(&nft_net->commit_mutex);
}
static void __net_exit nf_tables_exit_net(struct net *net)
@@ -9724,7 +10090,8 @@ static void __net_exit nf_tables_exit_net(struct net *net)
struct nftables_pernet *nft_net = nft_pernet(net);
mutex_lock(&nft_net->commit_mutex);
- if (!list_empty(&nft_net->commit_list))
+ if (!list_empty(&nft_net->commit_list) ||
+ !list_empty(&nft_net->module_list))
__nf_tables_abort(net, NFNL_ABORT_NONE);
__nft_release_tables(net);
mutex_unlock(&nft_net->commit_mutex);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.