diff options
Diffstat (limited to 'net/netfilter/nfnetlink_queue_core.c')
| -rw-r--r-- | net/netfilter/nfnetlink_queue_core.c | 63 |
1 files changed, 58 insertions, 5 deletions
diff --git a/net/netfilter/nfnetlink_queue_core.c b/net/netfilter/nfnetlink_queue_core.c index 11c7682fa0ea..685cc6a17163 100644 --- a/net/netfilter/nfnetlink_queue_core.c +++ b/net/netfilter/nfnetlink_queue_core.c @@ -278,6 +278,23 @@ nla_put_failure: return -1; } +static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata) +{ + u32 seclen = 0; +#if IS_ENABLED(CONFIG_NETWORK_SECMARK) + if (!skb || !sk_fullsock(skb->sk)) + return 0; + + read_lock_bh(&skb->sk->sk_callback_lock); + + if (skb->secmark) + security_secid_to_secctx(skb->secmark, secdata, &seclen); + + read_unlock_bh(&skb->sk->sk_callback_lock); +#endif + return seclen; +} + static struct sk_buff * nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue, struct nf_queue_entry *entry, @@ -297,6 +314,8 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue, struct nf_conn *ct = NULL; enum ip_conntrack_info uninitialized_var(ctinfo); bool csum_verify; + char *secdata = NULL; + u32 seclen = 0; size = nlmsg_total_size(sizeof(struct nfgenmsg)) + nla_total_size(sizeof(struct nfqnl_msg_packet_hdr)) @@ -352,6 +371,12 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue, + nla_total_size(sizeof(u_int32_t))); /* gid */ } + if ((queue->flags & NFQA_CFG_F_SECCTX) && entskb->sk) { + seclen = nfqnl_get_sk_secctx(entskb, &secdata); + if (seclen) + size += nla_total_size(seclen); + } + skb = nfnetlink_alloc_skb(net, size, queue->peer_portid, GFP_ATOMIC); if (!skb) { @@ -479,6 +504,9 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue, nfqnl_put_sk_uidgid(skb, entskb->sk) < 0) goto nla_put_failure; + if (seclen && nla_put(skb, NFQA_SECCTX, seclen, secdata)) + goto nla_put_failure; + if (ct && nfqnl_ct_put(skb, ct, ctinfo) < 0) goto nla_put_failure; @@ -806,8 +834,6 @@ nfqnl_dev_drop(struct net *net, int ifindex) rcu_read_unlock(); } -#define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0) - static int nfqnl_rcv_dev_event(struct notifier_block *this, unsigned long event, void *ptr) @@ -824,6 +850,27 @@ static struct notifier_block nfqnl_dev_notifier = { .notifier_call = nfqnl_rcv_dev_event, }; +static int nf_hook_cmp(struct nf_queue_entry *entry, unsigned long ops_ptr) +{ + return entry->elem == (struct nf_hook_ops *)ops_ptr; +} + +static void nfqnl_nf_hook_drop(struct net *net, struct nf_hook_ops *hook) +{ + struct nfnl_queue_net *q = nfnl_queue_pernet(net); + int i; + + rcu_read_lock(); + for (i = 0; i < INSTANCE_BUCKETS; i++) { + struct nfqnl_instance *inst; + struct hlist_head *head = &q->instance_table[i]; + + hlist_for_each_entry_rcu(inst, head, hlist) + nfqnl_flush(inst, nf_hook_cmp, (unsigned long)hook); + } + rcu_read_unlock(); +} + static int nfqnl_rcv_nl_event(struct notifier_block *this, unsigned long event, void *ptr) @@ -1031,7 +1078,8 @@ static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = { }; static const struct nf_queue_handler nfqh = { - .outfn = &nfqnl_enqueue_packet, + .outfn = &nfqnl_enqueue_packet, + .nf_hook_drop = &nfqnl_nf_hook_drop, }; static int @@ -1142,7 +1190,12 @@ nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb, ret = -EOPNOTSUPP; goto err_out_unlock; } - +#if !IS_ENABLED(CONFIG_NETWORK_SECMARK) + if (flags & mask & NFQA_CFG_F_SECCTX) { + ret = -EOPNOTSUPP; + goto err_out_unlock; + } +#endif spin_lock_bh(&queue->lock); queue->flags &= ~mask; queue->flags |= flags & mask; @@ -1257,7 +1310,7 @@ static int seq_show(struct seq_file *s, void *v) inst->copy_mode, inst->copy_range, inst->queue_dropped, inst->queue_user_dropped, inst->id_sequence, 1); - return seq_has_overflowed(s); + return 0; } static const struct seq_operations nfqnl_seq_ops = { |