Merge git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf
Pablo Neira Ayuso says: ==================== Netfilter fixes for net The following patchset contains Netfilter fixes for net: 1) Unbreak br_netfilter physdev match support, from Florian Westphal. 2) Use GFP_KERNEL_ACCOUNT for stateful/policy objects, from Chen Aotian. 3) Use IS_ENABLED() in nf_reset_trace(), from Florian Westphal. 4) Fix validation of catch-all set element. 5) Tighten requirements for catch-all set elements. * git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf: netfilter: nf_tables: tighten netlink attribute requirements for catch-all elements netfilter: nf_tables: validate catch-all set elements netfilter: nf_tables: fix ifdef to also consider nf_tables=m netfilter: nf_tables: Modify nla_memdup's flag to GFP_KERNEL_ACCOUNT netfilter: br_netfilter: fix recent physdev match breakage ==================== Link: https://lore.kernel.org/r/20230418145048.67270-1-pablo@netfilter.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Коммит
92e8c732d8
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@ -294,6 +294,7 @@ struct nf_bridge_info {
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u8 pkt_otherhost:1;
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u8 in_prerouting:1;
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u8 bridged_dnat:1;
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u8 sabotage_in_done:1;
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__u16 frag_max_size;
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struct net_device *physindev;
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@ -4712,7 +4713,7 @@ static inline void nf_reset_ct(struct sk_buff *skb)
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static inline void nf_reset_trace(struct sk_buff *skb)
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{
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#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE) || defined(CONFIG_NF_TABLES)
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#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE) || IS_ENABLED(CONFIG_NF_TABLES)
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skb->nf_trace = 0;
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#endif
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}
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@ -4732,7 +4733,7 @@ static inline void __nf_copy(struct sk_buff *dst, const struct sk_buff *src,
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dst->_nfct = src->_nfct;
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nf_conntrack_get(skb_nfct(src));
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#endif
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#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE) || defined(CONFIG_NF_TABLES)
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#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE) || IS_ENABLED(CONFIG_NF_TABLES)
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if (copy)
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dst->nf_trace = src->nf_trace;
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#endif
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@ -1085,6 +1085,10 @@ struct nft_chain {
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};
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int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain);
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int nft_setelem_validate(const struct nft_ctx *ctx, struct nft_set *set,
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const struct nft_set_iter *iter,
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struct nft_set_elem *elem);
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int nft_set_catchall_validate(const struct nft_ctx *ctx, struct nft_set *set);
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enum nft_chain_types {
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NFT_CHAIN_T_DEFAULT = 0,
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@ -868,12 +868,17 @@ static unsigned int ip_sabotage_in(void *priv,
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{
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struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
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if (nf_bridge && !nf_bridge->in_prerouting &&
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!netif_is_l3_master(skb->dev) &&
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!netif_is_l3_slave(skb->dev)) {
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nf_bridge_info_free(skb);
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state->okfn(state->net, state->sk, skb);
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return NF_STOLEN;
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if (nf_bridge) {
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if (nf_bridge->sabotage_in_done)
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return NF_ACCEPT;
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if (!nf_bridge->in_prerouting &&
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!netif_is_l3_master(skb->dev) &&
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!netif_is_l3_slave(skb->dev)) {
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nf_bridge->sabotage_in_done = 1;
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state->okfn(state->net, state->sk, skb);
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return NF_STOLEN;
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}
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}
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return NF_ACCEPT;
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@ -3447,6 +3447,64 @@ static int nft_table_validate(struct net *net, const struct nft_table *table)
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return 0;
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}
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int nft_setelem_validate(const struct nft_ctx *ctx, struct nft_set *set,
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const struct nft_set_iter *iter,
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struct nft_set_elem *elem)
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{
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const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
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struct nft_ctx *pctx = (struct nft_ctx *)ctx;
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const struct nft_data *data;
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int err;
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if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
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*nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
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return 0;
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data = nft_set_ext_data(ext);
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switch (data->verdict.code) {
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case NFT_JUMP:
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case NFT_GOTO:
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pctx->level++;
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err = nft_chain_validate(ctx, data->verdict.chain);
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if (err < 0)
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return err;
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pctx->level--;
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break;
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default:
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break;
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}
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return 0;
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}
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struct nft_set_elem_catchall {
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struct list_head list;
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struct rcu_head rcu;
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void *elem;
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};
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int nft_set_catchall_validate(const struct nft_ctx *ctx, struct nft_set *set)
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{
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u8 genmask = nft_genmask_next(ctx->net);
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struct nft_set_elem_catchall *catchall;
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struct nft_set_elem elem;
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struct nft_set_ext *ext;
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int ret = 0;
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list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
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ext = nft_set_elem_ext(set, catchall->elem);
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if (!nft_set_elem_active(ext, genmask))
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continue;
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elem.priv = catchall->elem;
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ret = nft_setelem_validate(ctx, set, NULL, &elem);
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if (ret < 0)
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return ret;
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}
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return ret;
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}
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static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
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const struct nft_chain *chain,
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const struct nlattr *nla);
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@ -4759,12 +4817,6 @@ err_set_name:
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return err;
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}
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struct nft_set_elem_catchall {
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struct list_head list;
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struct rcu_head rcu;
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void *elem;
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};
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static void nft_set_catchall_destroy(const struct nft_ctx *ctx,
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struct nft_set *set)
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{
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@ -6056,7 +6108,8 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
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if (err < 0)
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return err;
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if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
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if (((flags & NFT_SET_ELEM_CATCHALL) && nla[NFTA_SET_ELEM_KEY]) ||
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(!(flags & NFT_SET_ELEM_CATCHALL) && !nla[NFTA_SET_ELEM_KEY]))
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return -EINVAL;
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if (flags != 0) {
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@ -7052,7 +7105,7 @@ static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
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}
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if (nla[NFTA_OBJ_USERDATA]) {
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obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL);
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obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL_ACCOUNT);
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if (obj->udata == NULL)
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goto err_userdata;
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@ -199,37 +199,6 @@ nla_put_failure:
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return -1;
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}
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static int nft_lookup_validate_setelem(const struct nft_ctx *ctx,
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struct nft_set *set,
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const struct nft_set_iter *iter,
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struct nft_set_elem *elem)
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{
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const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
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struct nft_ctx *pctx = (struct nft_ctx *)ctx;
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const struct nft_data *data;
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int err;
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if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
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*nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
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return 0;
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data = nft_set_ext_data(ext);
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switch (data->verdict.code) {
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case NFT_JUMP:
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case NFT_GOTO:
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pctx->level++;
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err = nft_chain_validate(ctx, data->verdict.chain);
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if (err < 0)
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return err;
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pctx->level--;
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break;
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default:
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break;
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}
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return 0;
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}
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static int nft_lookup_validate(const struct nft_ctx *ctx,
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const struct nft_expr *expr,
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const struct nft_data **d)
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@ -245,9 +214,12 @@ static int nft_lookup_validate(const struct nft_ctx *ctx,
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iter.skip = 0;
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iter.count = 0;
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iter.err = 0;
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iter.fn = nft_lookup_validate_setelem;
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iter.fn = nft_setelem_validate;
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priv->set->ops->walk(ctx, priv->set, &iter);
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if (!iter.err)
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iter.err = nft_set_catchall_validate(ctx, priv->set);
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if (iter.err < 0)
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return iter.err;
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