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Pablo Neira Ayuso 931401137f netfilter: nfnetlink_queue: honor NFQA_CFG_F_FAIL_OPEN when netlink unicast fails 
When netlink unicast fails to deliver the message to userspace, we
should also check if the NFQA_CFG_F_FAIL_OPEN flag is set so we reinject
the packet back to the stack.

I think the user expects no packet drops when this flag is set due to
queueing to userspace errors, no matter if related to the internal queue
or when sending the netlink message to userspace.

The userspace application will still get the ENOBUFS error via recvmsg()
so the user still knows that, with the current configuration that is in
place, the userspace application is not consuming the messages at the
pace that the kernel needs.

Reported-by: "Yigal Reiss (yreiss)" <yreiss@cisco.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Tested-by: "Yigal Reiss (yreiss)" <yreiss@cisco.com>
 		2016-03-28 17:59:20 +02:00
..
ipset netfilter: ipset: fix race condition in ipset save, swap and delete 2016-03-28 17:57:45 +02:00
ipvs Merge tag 'ipvs-fixes-for-v4.5' of https://git.kernel.org/pub/scm/linux/kernel/git/horms/ipvs 2016-03-11 11:37:35 +01:00
Kconfig netfilter: tee: select NF_DUP_IPV6 unconditionally 2016-02-08 12:58:28 +01:00
Makefile netfilter: nf_tables: add forward expression to the netdev family 2016-01-04 17:48:38 +01:00
core.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-10-24 06:54:12 -07:00
nf_conntrack_acct.c netfilter: Remove uses of seq_<foo> return values 2015-03-18 10:51:35 +01:00
nf_conntrack_amanda.c net: Remove state argument from skb_find_text() 2015-02-22 15:59:54 -05:00
nf_conntrack_broadcast.c
…
nf_conntrack_core.c netfilter: nf_conntrack: consolidate lock/unlock into unlock_wait 2016-03-15 01:10:42 +01:00
nf_conntrack_ecache.c netfilter: conntrack: remove timer from ecache extension 2014-06-25 19:15:38 +02:00
nf_conntrack_expect.c netfilter: Set /proc/net entries owner to root in namespace 2015-11-25 13:54:09 +01:00
nf_conntrack_extend.c
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nf_conntrack_ftp.c netfilter: nf_ct_helper: define pr_fmt() 2016-01-04 17:48:51 +01:00
nf_conntrack_h323_asn1.c
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nf_conntrack_h323_main.c ipv6: Remove external dependency on rt6i_gateway and RTF_ANYCAST 2015-05-25 13:25:33 -04:00
nf_conntrack_h323_types.c
…
nf_conntrack_helper.c netfilter: nf_conntrack: use safer way to lock all buckets 2016-01-20 14:15:31 +01:00
nf_conntrack_irc.c netfilter: nf_ct_helper: define pr_fmt() 2016-01-04 17:48:51 +01:00
nf_conntrack_l3proto_generic.c netfilter: Convert print_tuple functions to return void 2014-11-05 14:10:33 -05:00
nf_conntrack_labels.c netfilter: connlabels: Export setting connlabel length 2015-08-27 11:40:43 -07:00
nf_conntrack_netbios_ns.c
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nf_conntrack_netlink.c netfilter: nf_conntrack: use safer way to lock all buckets 2016-01-20 14:15:31 +01:00
nf_conntrack_pptp.c netfilter: nf_conntrack: push zone object into functions 2015-08-11 12:29:01 +02:00
nf_conntrack_proto.c netfilter: nf_conntrack: remove dead code 2014-01-03 23:41:37 +01:00
nf_conntrack_proto_dccp.c netfilter: nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple 2015-09-18 22:00:04 +02:00
nf_conntrack_proto_generic.c netfilter: nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple 2015-09-18 22:00:04 +02:00
nf_conntrack_proto_gre.c netfilter: nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple 2015-09-18 22:00:04 +02:00
nf_conntrack_proto_sctp.c netfilter: nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple 2015-09-18 22:00:04 +02:00
nf_conntrack_proto_tcp.c netfilter: nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple 2015-09-18 22:00:04 +02:00
nf_conntrack_proto_udp.c netfilter: nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple 2015-09-18 22:00:04 +02:00
nf_conntrack_proto_udplite.c netfilter: nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple 2015-09-18 22:00:04 +02:00
nf_conntrack_sane.c netfilter: nf_ct_helper: define pr_fmt() 2016-01-04 17:48:51 +01:00
nf_conntrack_seqadj.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_conntrack_sip.c netfilter: nf_ct_helper: define pr_fmt() 2016-01-04 17:48:51 +01:00
nf_conntrack_snmp.c
…
nf_conntrack_standalone.c netfilter: Set /proc/net entries owner to root in namespace 2015-11-25 13:54:09 +01:00
nf_conntrack_tftp.c netfilter: nf_ct_helper: define pr_fmt() 2016-01-04 17:48:51 +01:00
nf_conntrack_timeout.c netfilter: cttimeout: add netns support 2015-12-14 12:48:58 +01:00
nf_conntrack_timestamp.c netfilter: nf_ct_timestamp: Fix BUG_ON after netns deletion 2013-12-20 14:58:29 +01:00
nf_dup_netdev.c net: remove skb_sender_cpu_clear() 2016-03-01 17:36:47 -05:00
nf_internals.h netfilter: nf_queue: fix nf_queue_nf_hook_drop() 2015-07-23 16:17:58 +02:00
nf_log.c netfilter: nf_log: wait for rcu grace after logger unregistration 2015-09-17 13:37:31 +02:00
nf_log_common.c netfilter: bridge: add helpers for fetching physin/outdev 2015-04-08 16:49:08 +02:00
nf_nat_amanda.c
…
nf_nat_core.c netfilter: Pass net into nf_xfrm_me_harder 2015-09-18 22:00:22 +02:00
nf_nat_ftp.c
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nf_nat_helper.c netfilter: nf_conntrack: make sequence number adjustments usuable without NAT 2013-08-28 00:26:48 +02:00
nf_nat_irc.c netfilter: nf_nat: fix access to uninitialized buffer in IRC NAT helper 2014-01-06 14:17:17 +01:00
nf_nat_proto_common.c netfilter: use IS_ENABLED() macro 2014-06-30 11:38:03 +02:00
nf_nat_proto_dccp.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_nat_proto_sctp.c netfilter: use IS_ENABLED() macro 2014-06-30 11:38:03 +02:00
nf_nat_proto_tcp.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_nat_proto_udp.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_nat_proto_udplite.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_nat_proto_unknown.c
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nf_nat_redirect.c netfilter: nf_nat_redirect: add missing NULL pointer check 2015-10-27 06:54:56 +01:00
nf_nat_sip.c netfilter: replace strnicmp with strncasecmp 2014-10-14 02:18:24 +02:00
nf_nat_tftp.c
…
nf_queue.c netfilter: nf_queue: remove rcu_read_lock calls 2015-10-16 18:22:41 +02:00
nf_sockopt.c netfilter: don't use mutex_lock_interruptible() 2014-08-08 16:47:23 +02:00
nf_synproxy_core.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2015-09-05 21:57:42 -07:00
nf_tables_api.c netfilter: nf_tables: Add new attributes into nft_set to store user data. 2016-01-08 13:25:08 +01:00
nf_tables_core.c netfilter: nf_tables: fix nf_log_trace based tracing 2015-12-09 16:53:46 +01:00
nf_tables_inet.c netfilter: nf_tables: release objects on netns destruction 2015-12-28 18:34:35 +01:00
nf_tables_netdev.c netfilter: nf_tables_netdev: fix error path in module initialization 2016-01-18 13:53:37 +01:00
nf_tables_trace.c netfilter: nf_tables: wrap tracing with a static key 2015-12-09 13:23:13 +01:00
nfnetlink.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-02-23 00:09:14 -05:00
nfnetlink_acct.c netfilter: nfnetlink_acct: validate NFACCT_FILTER parameters 2016-02-29 13:27:21 +01:00
nfnetlink_cthelper.c netfilter: nfnetlink: pass down netns pointer to call() and call_rcu() 2015-12-28 18:41:41 +01:00
nfnetlink_cttimeout.c netfilter: cttimeout: fix deadlock due to erroneous unlock/lock conversion 2016-02-01 00:15:28 +01:00
nfnetlink_log.c nfnetlink: remove nfnetlink_alloc_skb 2016-02-18 11:42:19 -05:00
nfnetlink_queue.c netfilter: nfnetlink_queue: honor NFQA_CFG_F_FAIL_OPEN when netlink unicast fails 2016-03-28 17:59:20 +02:00
nft_bitwise.c netfilter: nf_tables: support variable sized data in nft_data_init() 2015-04-13 17:17:30 +02:00
nft_byteorder.c netfilter: nft_byteorder: avoid unneeded le/be conversion steps 2016-01-13 14:02:59 +01:00
nft_cmp.c netfilter: nf_tables: support variable sized data in nft_data_init() 2015-04-13 17:17:30 +02:00
nft_compat.c netfilter: nft_compat: check match/targetinfo attr size 2016-03-11 11:37:56 +01:00
nft_counter.c netfilter: nft_counter: fix erroneous return values 2016-02-08 13:05:02 +01:00
nft_ct.c netfilter: nft_ct: keep counters away from CONFIG_NF_CONNTRACK_LABELS 2016-01-14 19:41:16 +01:00
nft_dup_netdev.c netfilter: nf_tables: add packet duplication to the netdev family 2016-01-03 21:04:23 +01:00
nft_dynset.c netfilter: nf_tables: add clone interface to expression operations 2015-11-10 23:47:32 +01:00
nft_exthdr.c netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
nft_fwd_netdev.c netfilter: nf_tables: add forward expression to the netdev family 2016-01-04 17:48:38 +01:00
nft_hash.c netfilter: nf_tables: variable sized set element keys / data 2015-04-13 17:17:31 +02:00
nft_immediate.c netfilter: nf_tables: support variable sized data in nft_data_init() 2015-04-13 17:17:30 +02:00
nft_limit.c netfilter: nft_limit: allow to invert matching criteria 2016-01-03 20:58:52 +01:00
nft_log.c netfilter: nf_tables: Use pkt->net instead of computing net from the passed net_devices 2015-09-18 21:58:49 +02:00
nft_lookup.c netfilter: nf_tables: add flag to indicate set contains expressions 2015-04-13 20:12:32 +02:00
nft_masq.c netfilter: nft_masq: support port range 2016-03-02 20:05:27 +01:00
nft_meta.c netfilter: meta: add PRANDOM support 2016-02-29 13:55:59 +01:00
nft_nat.c netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
nft_payload.c netfilter: nft_payload: add packet mangling support 2015-11-25 13:54:51 +01:00
nft_queue.c netfilter: nf_tables: kill nft_pktinfo.ops 2015-09-18 21:58:01 +02:00
nft_rbtree.c netfilter: nf_tables: variable sized set element keys / data 2015-04-13 17:17:31 +02:00
nft_redir.c netfilter: nf_tables: add register parsing/dumping helpers 2015-04-13 17:17:28 +02:00
nft_reject.c netfilter; Add some missing default cases to switch statements in nft_reject. 2015-04-27 13:20:34 -04:00
nft_reject_inet.c ipv4: Push struct net down into nf_send_reset 2015-09-29 20:21:31 +02:00
x_tables.c netfilter: x_tables: check for size overflow 2016-03-12 11:55:01 +01:00
xt_AUDIT.c netfilter: Convert uses of __constant_<foo> to <foo> 2014-03-13 14:13:19 +01:00
xt_CHECKSUM.c
…
xt_CLASSIFY.c
…
xt_CONNSECMARK.c
…
xt_CT.c netfilter: cttimeout: add netns support 2015-12-14 12:48:58 +01:00
xt_DSCP.c netfilter: fix various sparse warnings 2014-11-13 12:14:42 +01:00
xt_HL.c
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xt_HMARK.c net: use reciprocal_scale() helper 2014-08-23 12:21:21 -07:00
xt_IDLETIMER.c netfilter: IDLETIMER: fix lockdep warning 2015-07-13 17:23:25 +02:00
xt_LED.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-08-05 18:46:26 -07:00
xt_LOG.c netfilter: x_tables: Use par->net instead of computing from the passed net devices 2015-09-18 21:58:25 +02:00
xt_NETMAP.c
…
xt_NFLOG.c netfilter: x_tables: Use par->net instead of computing from the passed net devices 2015-09-18 21:58:25 +02:00
xt_NFQUEUE.c netfilter: xt_NFQUEUE: separate reusable code 2013-12-07 23:20:45 +01:00
xt_RATEEST.c net: sched: make bstats per cpu and estimator RCU safe 2014-09-30 01:02:26 -04:00
xt_REDIRECT.c netfilter: combine IPv4 and IPv6 nf_nat_redirect code in one module 2014-11-27 13:08:42 +01:00
xt_SECMARK.c
…
xt_TCPMSS.c netfilter: xt_TCPMSS: handle CHECKSUM_COMPLETE in tcpmss_tg6() 2016-01-18 12:18:17 +01:00
xt_TCPOPTSTRIP.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
xt_TEE.c netfilter: tee: select NF_DUP_IPV6 unconditionally 2016-02-08 12:58:28 +01:00
xt_TPROXY.c inet: refactor inet[6]_lookup functions to take skb 2016-02-11 03:54:14 -05:00
xt_TRACE.c
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xt_addrtype.c netfilter: x_tables: Use par->net instead of computing from the passed net devices 2015-09-18 21:58:25 +02:00
xt_bpf.c net: filter: split 'struct sk_filter' into socket and bpf parts 2014-08-02 15:03:58 -07:00
xt_cgroup.c netfilter: implement xt_cgroup cgroup2 path match 2015-12-14 20:34:55 +01:00
xt_cluster.c net: use reciprocal_scale() helper 2014-08-23 12:21:21 -07:00
xt_comment.c
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xt_connbytes.c netfilter: Convert pr_warning to pr_warn 2014-09-10 12:40:10 -07:00
xt_connlabel.c netfilter: connlabels: Export setting connlabel length 2015-08-27 11:40:43 -07:00
xt_connlimit.c netfilter: nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple 2015-09-18 22:00:04 +02:00
xt_connmark.c netfilter: Fix FSF address in file headers 2013-12-06 12:37:57 -05:00
xt_conntrack.c
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xt_cpu.c
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xt_dccp.c
…
xt_devgroup.c
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xt_dscp.c
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xt_ecn.c
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xt_esp.c
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xt_hashlimit.c netfilter: Remove checks of seq_printf() return values 2014-11-05 14:11:02 -05:00
xt_helper.c
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xt_hl.c
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xt_ipcomp.c netfilter: xt_ipcomp: Use ntohs to ease sparse warning 2014-02-19 11:41:25 +01:00
xt_iprange.c
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xt_ipvs.c ipvs: Pass ipvs into conn_out_get 2015-09-24 09:34:41 +09:00
xt_l2tp.c netfilter: introduce l2tp match extension 2014-01-09 21:36:39 +01:00
xt_length.c
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xt_limit.c
…
xt_mac.c
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xt_mark.c netfilter: xt_MARK: Add ARP support 2015-05-14 13:00:27 +02:00
xt_multiport.c
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xt_nat.c
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xt_nfacct.c netfilter: nfacct: per network namespace support 2015-08-07 11:50:56 +02:00
xt_osf.c netfilter: xt_osf: remove unused variable 2016-02-29 13:59:43 +01:00
xt_owner.c netfilter: xt_owner: use skb_to_full_sk() helper 2015-11-08 20:56:39 -05:00
xt_physdev.c netfilter: physdev: use helpers 2015-04-08 16:49:09 +02:00
xt_pkttype.c
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xt_policy.c
…
xt_quota.c
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xt_rateest.c net_sched: add 64bit rate estimators 2013-06-11 02:51:03 -07:00
xt_realm.c
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xt_recent.c netfilter: x_tables: Use par->net instead of computing from the passed net devices 2015-09-18 21:58:25 +02:00
xt_repldata.h net: netfilter: LLVMLinux: vlais-netfilter 2014-06-07 11:44:39 -07:00
xt_sctp.c
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xt_set.c netfilter: ipset: Fix coding styles reported by checkpatch.pl 2015-06-14 10:40:18 +02:00
xt_socket.c inet: refactor inet[6]_lookup functions to take skb 2016-02-11 03:54:14 -05:00
xt_state.c
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xt_statistic.c net: replace macros net_random and net_srandom with direct calls to prandom 2014-01-14 15:15:25 -08:00
xt_string.c net: Remove state argument from skb_find_text() 2015-02-22 15:59:54 -05:00
xt_tcpmss.c
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xt_tcpudp.c
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xt_time.c
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xt_u32.c
…