redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity
alistair23-linux/net/netfilter
History
Daniel Borkmann 9cf94eab8b netfilter: conntrack: use nf_ct_tmpl_free in CT/synproxy error paths 
Commit 0838aa7fcf ("netfilter: fix netns dependencies with conntrack
templates") migrated templates to the new allocator api, but forgot to
update error paths for them in CT and synproxy to use nf_ct_tmpl_free()
instead of nf_conntrack_free().

Due to that, memory is being freed into the wrong kmemcache, but also
we drop the per net reference count of ct objects causing an imbalance.

In Brad's case, this leads to a wrap-around of net->ct.count and thus
lets __nf_conntrack_alloc() refuse to create a new ct object:

  [   10.340913] xt_addrtype: ipv6 does not support BROADCAST matching
  [   10.810168] nf_conntrack: table full, dropping packet
  [   11.917416] r8169 0000:07:00.0 eth0: link up
  [   11.917438] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
  [   12.815902] nf_conntrack: table full, dropping packet
  [   15.688561] nf_conntrack: table full, dropping packet
  [   15.689365] nf_conntrack: table full, dropping packet
  [   15.690169] nf_conntrack: table full, dropping packet
  [   15.690967] nf_conntrack: table full, dropping packet
  [...]

With slab debugging, it also reports the wrong kmemcache (kmalloc-512 vs.
nf_conntrack_ffffffff81ce75c0) and reports poison overwrites, etc. Thus,
to fix the problem, export and use nf_ct_tmpl_free() instead.

Fixes: 0838aa7fcf ("netfilter: fix netns dependencies with conntrack templates")
Reported-by: Brad Jackson <bjackson0971@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-09-01 12:15:08 +02:00
..
ipset netfilter: ipset: Fixing unnamed union init 2015-08-29 01:02:28 +02:00
ipvs ipvs: call skb_sender_cpu_clear 2015-07-14 16:41:27 +09:00
core.c netfilter: nf_qeueue: Drop queue entries on nf_unregister_hook 2015-06-23 06:23:23 -07:00
Kconfig netfilter: Kconfig: get rid of parens around depends on 2015-06-15 17:26:37 +02:00
Makefile netfilter: nf_tables: add netdev table to filter from ingress 2015-05-26 18:41:23 +02:00
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: conntrack: use nf_ct_tmpl_free in CT/synproxy error paths 2015-09-01 12:15:08 +02:00
nf_conntrack_ecache.c netfilter: conntrack: remove timer from ecache extension 2014-06-25 19:15:38 +02:00
nf_conntrack_expect.c netfilter: nf_conntrack: Support expectations in different zones 2015-07-22 17:00:47 +02:00
nf_conntrack_extend.c
nf_conntrack_ftp.c netfilter: replace strnicmp with strncasecmp 2014-10-14 02:18:24 +02:00
nf_conntrack_h323_asn1.c
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: fix spelling errors 2014-10-30 17:35:30 +01:00
nf_conntrack_irc.c
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
nf_conntrack_netbios_ns.c
nf_conntrack_netlink.c netfilter: ctnetlink: put back references to master ct and expect objects 2015-07-10 14:18:03 +02:00
nf_conntrack_pptp.c netfilter: nf_conntrack: flush net_gre->keymap_list only from gre helper 2014-04-08 10:56:12 +02:00
nf_conntrack_proto.c
nf_conntrack_proto_dccp.c netfilter: Convert print_tuple functions to return void 2014-11-05 14:10:33 -05:00
nf_conntrack_proto_generic.c netfilter: conntrack: warn the user if there is a better helper to use 2015-06-12 14:06:24 +02:00
nf_conntrack_proto_gre.c netfilter: Convert print_tuple functions to return void 2014-11-05 14:10:33 -05:00
nf_conntrack_proto_sctp.c netfilter: Convert print_tuple functions to return void 2014-11-05 14:10:33 -05:00
nf_conntrack_proto_tcp.c conntrack: RFC5961 challenge ACK confuse conntrack LAST-ACK transition 2015-05-15 20:50:56 +02:00
nf_conntrack_proto_udp.c netfilter: Convert print_tuple functions to return void 2014-11-05 14:10:33 -05:00
nf_conntrack_proto_udplite.c netfilter: Convert print_tuple functions to return void 2014-11-05 14:10:33 -05:00
nf_conntrack_sane.c
nf_conntrack_seqadj.c netfilter: nf_ct_seqadj: print ack seq in the right host byte order 2015-01-05 13:52:20 +01:00
nf_conntrack_sip.c netfilter: replace strnicmp with strncasecmp 2014-10-14 02:18:24 +02:00
nf_conntrack_snmp.c
nf_conntrack_standalone.c netfilter: Remove checks of seq_printf() return values 2014-11-05 14:11:02 -05:00
nf_conntrack_tftp.c
nf_conntrack_timeout.c
nf_conntrack_timestamp.c
nf_internals.h netfilter: nf_qeueue: Drop queue entries on nf_unregister_hook 2015-06-23 06:23:23 -07:00
nf_log.c netfilter: restore rule tracing via nfnetlink_log 2015-03-19 11:14:48 +01:00
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 net: use reciprocal_scale() helper 2014-08-23 12:21:21 -07:00
nf_nat_ftp.c
nf_nat_helper.c
nf_nat_irc.c
nf_nat_proto_common.c netfilter: use IS_ENABLED() macro 2014-06-30 11:38:03 +02:00
nf_nat_proto_dccp.c netfilter: use IS_ENABLED() macro 2014-06-30 11:38:03 +02:00
nf_nat_proto_sctp.c netfilter: use IS_ENABLED() macro 2014-06-30 11:38:03 +02:00
nf_nat_proto_tcp.c netfilter: use IS_ENABLED() macro 2014-06-30 11:38:03 +02:00
nf_nat_proto_udp.c netfilter: use IS_ENABLED() macro 2014-06-30 11:38:03 +02:00
nf_nat_proto_udplite.c netfilter: use IS_ENABLED() macro 2014-06-30 11:38:03 +02:00
nf_nat_proto_unknown.c
nf_nat_redirect.c netfilter: combine IPv4 and IPv6 nf_nat_redirect code in one module 2014-11-27 13:08:42 +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: Don't recompute the hook_list head 2015-07-02 15:03:13 +02:00
nf_sockopt.c netfilter: don't use mutex_lock_interruptible() 2014-08-08 16:47:23 +02:00
nf_synproxy_core.c netfilter: conntrack: use nf_ct_tmpl_free in CT/synproxy error paths 2015-09-01 12:15:08 +02:00
nf_tables_api.c netfilter: nf_tables_netdev: unregister hooks on net_device removal 2015-06-15 23:02:35 +02:00
nf_tables_core.c netfilter: nftables: Do not run chains in the wrong network namespace 2015-06-23 06:23:22 -07:00
nf_tables_inet.c
nf_tables_netdev.c netfilter: nf_tables_netdev: unregister hooks on net_device removal 2015-06-15 23:02:35 +02:00
nfnetlink.c netfilter: nfnetlink: work around wrong endianess in res_id field 2015-08-29 01:02:35 +02:00
nfnetlink_acct.c netfilter: nfnetlink_acct: add filter support to nfacct counter list/reset 2014-08-26 21:36:19 +02:00
nfnetlink_cthelper.c netfilter: Zero the tuple in nfnl_cthelper_parse_tuple() 2015-03-12 13:07:36 +01:00
nfnetlink_cttimeout.c
nfnetlink_log.c netfilter: Kill unused copies of RCV_SKB_FAIL 2015-06-18 21:14:27 +02:00
nfnetlink_queue_core.c netfilter: nf_qeueue: Drop queue entries on nf_unregister_hook 2015-06-23 06:23:23 -07:00
nfnetlink_queue_ct.c
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: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
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: x_tables: add context to know if extension runs from nft_compat 2015-05-15 20:14:07 +02:00
nft_counter.c netfilter: nf_tables: mark stateful expressions 2015-04-13 20:12:31 +02:00
nft_ct.c netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
nft_dynset.c netfilter: nft_dynset: dynamic stateful expression instantiation 2015-04-13 20:19:55 +02:00
nft_exthdr.c netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
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: nf_tables: mark stateful expressions 2015-04-13 20:12:31 +02:00
nft_log.c netfilter: nf_tables: get rid of NFT_REG_VERDICT usage 2015-04-13 17:17:07 +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: nf_tables: validate hooks in NAT expressions 2015-01-19 14:52:39 +01:00
nft_meta.c netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
nft_nat.c netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
nft_payload.c netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
nft_queue.c netfilter: nf_tables: get rid of NFT_REG_VERDICT usage 2015-04-13 17:17:07 +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 netfilter; Add some missing default cases to switch statements in nft_reject. 2015-04-27 13:20:34 -04:00
x_tables.c netfilter: x_tables: remove XT_TABLE_INFO_SZ and a dereference. 2015-06-15 20:19:20 +02:00
xt_addrtype.c ipv6: Remove external dependency on rt6i_gateway and RTF_ANYCAST 2015-05-25 13:25:33 -04:00
xt_AUDIT.c
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: x_tables: fix cgroup matching on non-full sks 2015-04-01 11:26:42 +02:00
xt_CHECKSUM.c
xt_CLASSIFY.c
xt_cluster.c net: use reciprocal_scale() helper 2014-08-23 12:21:21 -07:00
xt_comment.c
xt_connbytes.c netfilter: Convert pr_warning to pr_warn 2014-09-10 12:40:10 -07:00
xt_connlabel.c
xt_connlimit.c netfilter: xt_connlimit: honor conntrack zone if available 2014-11-17 12:44:20 +01:00
xt_connmark.c
xt_CONNSECMARK.c
xt_conntrack.c
xt_cpu.c
xt_CT.c netfilter: conntrack: use nf_ct_tmpl_free in CT/synproxy error paths 2015-09-01 12:15:08 +02:00
xt_dccp.c
xt_devgroup.c
xt_dscp.c
xt_DSCP.c netfilter: fix various sparse warnings 2014-11-13 12:14:42 +01:00
xt_ecn.c
xt_esp.c
xt_hashlimit.c netfilter: Remove checks of seq_printf() return values 2014-11-05 14:11:02 -05:00
xt_helper.c
xt_hl.c
xt_HL.c
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_ipcomp.c
xt_iprange.c
xt_ipvs.c
xt_l2tp.c
xt_LED.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-08-05 18:46:26 -07:00
xt_length.c
xt_limit.c
xt_LOG.c netfilter: xt_LOG: add missing string format in nf_log_packet() 2014-06-28 18:50:35 +02:00
xt_mac.c
xt_mark.c netfilter: xt_MARK: Add ARP support 2015-05-14 13:00:27 +02:00
xt_multiport.c
xt_nat.c
xt_NETMAP.c
xt_nfacct.c netfilter: nfnetlink_acct: Adding quota support to accounting framework 2014-04-29 18:25:14 +02:00
xt_NFLOG.c
xt_NFQUEUE.c
xt_osf.c netfilter: xt_osf: Use continue to reduce indentation 2014-12-23 14:20:10 +01:00
xt_owner.c
xt_physdev.c netfilter: physdev: use helpers 2015-04-08 16:49:09 +02:00
xt_pkttype.c
xt_policy.c
xt_quota.c
xt_RATEEST.c net: sched: make bstats per cpu and estimator RCU safe 2014-09-30 01:02:26 -04:00
xt_rateest.c
xt_realm.c
xt_recent.c netfilter: xt_recent: don't reject rule if new hitcount exceeds table max 2015-02-16 17:00:47 +01:00
xt_REDIRECT.c netfilter: combine IPv4 and IPv6 nf_nat_redirect code in one module 2014-11-27 13:08:42 +01:00
xt_repldata.h net: netfilter: LLVMLinux: vlais-netfilter 2014-06-07 11:44:39 -07:00
xt_sctp.c
xt_SECMARK.c
xt_set.c netfilter: ipset: Fix coding styles reported by checkpatch.pl 2015-06-14 10:40:18 +02:00
xt_socket.c netfilter: xt_socket: add XT_SOCKET_RESTORESKMARK flag 2015-06-18 13:05:09 +02:00
xt_state.c
xt_statistic.c
xt_string.c net: Remove state argument from skb_find_text() 2015-02-22 15:59:54 -05:00
xt_TCPMSS.c netfilter: x_tables: add context to know if extension runs from nft_compat 2015-05-15 20:14:07 +02:00
xt_tcpmss.c
xt_TCPOPTSTRIP.c
xt_tcpudp.c
xt_TEE.c ipv6: Set FLOWI_FLAG_KNOWN_NH at flowi6_flags 2015-05-25 13:25:34 -04:00
xt_time.c
xt_TPROXY.c tcp/dccp: get rid of central timewait timer 2015-04-13 16:40:05 -04:00
xt_TRACE.c
xt_u32.c