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Pablo Neira Ayuso a16a1647fa netfilter: ctnetlink: fix race between delete and timeout expiration 
Kerin Millar reported hardlockups while running `conntrackd -c'
in a busy firewall. That system (with several processors) was
acting as backup in a primary-backup setup.

After several tries, I found a race condition between the deletion
operation of ctnetlink and timeout expiration. This patch fixes
this problem.

Tested-by: Kerin Millar <kerframil@gmail.com>
Reported-by: Kerin Millar <kerframil@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2012-03-17 01:47:08 -07:00
..
ipset netfilter: ipset: dumping error triggered removing references twice 2012-01-17 10:52:55 +01:00
ipvs ipvs: fix matching of fwmark templates during scheduling 2012-02-04 20:27:58 +01:00
Kconfig netfilter: Kconfig: fix unmet xt_nfacct dependencies 2011-12-29 14:39:19 -05:00
Makefile netfilter: xtables: move ipt_ecn to xt_ecn 2011-12-27 20:31:31 +01:00
core.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
nf_conntrack_acct.c Merge branch 'nf-next' of git://1984.lsi.us.es/net-next 2011-12-25 02:21:45 -05:00
nf_conntrack_amanda.c netfilter: cleanup printk messages 2010-05-13 15:02:08 +02:00
nf_conntrack_broadcast.c netfilter: nf_conntrack: nf_conntrack snmp helper 2011-01-18 18:12:24 +01:00
nf_conntrack_core.c netfilter: nf_conntrack: fix early_drop with reliable event delivery 2012-03-06 14:43:50 -05:00
nf_conntrack_ecache.c net: reintroduce missing rcu_assign_pointer() calls 2012-01-12 12:26:56 -08:00
nf_conntrack_expect.c netfilter: provide config option to disable ancient procfs parts 2011-12-27 20:45:28 +01:00
nf_conntrack_extend.c net: reintroduce missing rcu_assign_pointer() calls 2012-01-12 12:26:56 -08:00
nf_conntrack_ftp.c module_param: make bool parameters really bool (net & drivers/net) 2011-12-19 22:27:29 -05:00
nf_conntrack_h323_asn1.c netfilter: h323: bug in parsing of ASN1 SEQOF field 2011-04-04 15:21:02 +02:00
nf_conntrack_h323_main.c module_param: make bool parameters really bool (net & drivers/net) 2011-12-19 22:27:29 -05:00
nf_conntrack_h323_types.c
…
nf_conntrack_helper.c netfilter: revert user-space expectation helper support 2012-01-16 14:01:23 +01:00
nf_conntrack_irc.c netfilter: add more values to enum ip_conntrack_info 2011-06-06 01:35:10 +02:00
nf_conntrack_l3proto_generic.c
…
nf_conntrack_netbios_ns.c netfilter: nf_conntrack: nf_conntrack snmp helper 2011-01-18 18:12:24 +01:00
nf_conntrack_netlink.c netfilter: ctnetlink: fix race between delete and timeout expiration 2012-03-17 01:47:08 -07:00
nf_conntrack_pptp.c netfilter: nf_ct_pptp: fix DNATed PPTP connection address translation 2011-08-30 15:23:03 +02:00
nf_conntrack_proto.c netfilter: rcu sparse cleanups 2010-11-15 19:45:13 +01:00
nf_conntrack_proto_dccp.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
nf_conntrack_proto_generic.c sysctl net: Remove unused binary sysctl code 2009-11-12 02:05:06 -08:00
nf_conntrack_proto_gre.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
nf_conntrack_proto_sctp.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
nf_conntrack_proto_tcp.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
nf_conntrack_proto_udp.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
nf_conntrack_proto_udplite.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
nf_conntrack_sane.c netfilter: add more values to enum ip_conntrack_info 2011-06-06 01:35:10 +02:00
nf_conntrack_sip.c netfilter: add more values to enum ip_conntrack_info 2011-06-06 01:35:10 +02:00
nf_conntrack_snmp.c netfilter: nf_conntrack: nf_conntrack snmp helper 2011-01-18 18:12:24 +01:00
nf_conntrack_standalone.c netfilter: provide config option to disable ancient procfs parts 2011-12-27 20:45:28 +01:00
nf_conntrack_tftp.c netfilter: cleanup printk messages 2010-05-13 15:02:08 +02:00
nf_conntrack_timestamp.c module_param: make bool parameters really bool (net & drivers/net) 2011-12-19 22:27:29 -05:00
nf_internals.h netfilter: cleanup printk messages 2010-05-13 15:02:08 +02:00
nf_log.c net: reintroduce missing rcu_assign_pointer() calls 2012-01-12 12:26:56 -08:00
nf_queue.c netfilter: nf_queue: fix queueing of bridged gro skbs 2012-02-09 20:47:53 +01:00
nf_sockopt.c
…
nf_tproxy_core.c netfilter: tproxy: do not assign timewait sockets to skb->sk 2011-02-17 11:32:38 +01:00
nfnetlink.c Merge branch 'for-linus' of git://selinuxproject.org/~jmorris/linux-security 2012-01-14 18:36:33 -08:00
nfnetlink_acct.c netfilter: nfnetlink_acct: fix nfnl_acct_get operation 2012-01-01 16:36:08 +01:00
nfnetlink_log.c netfilter: Remove unnecessary OOM logging messages 2011-11-01 09:19:49 +01:00
nfnetlink_queue.c netfilter: nf_queue: reject NF_STOLEN verdicts from userspace 2011-08-30 15:01:20 +02:00
x_tables.c net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
xt_AUDIT.c ipv6: Add fragment reporting to ipv6_skip_exthdr(). 2011-12-03 09:35:10 -08:00
xt_CHECKSUM.c netfilter: add CHECKSUM target 2010-07-15 17:20:46 +02:00
xt_CLASSIFY.c netfilter: xt_CLASSIFY: add ARP support, allow CLASSIFY target on any table 2010-11-15 13:57:56 +01:00
xt_CONNSECMARK.c netfilter: xtables: substitute temporary defines by final name 2010-05-11 18:31:17 +02:00
xt_CT.c netfilter: revert user-space expectation helper support 2012-01-16 14:01:23 +01:00
xt_DSCP.c netfilter: IPv6: fix DSCP mangle code 2011-05-10 10:00:21 +02:00
xt_HL.c netfilter: Reduce switch/case indent 2011-07-01 16:11:15 -07:00
xt_IDLETIMER.c netfilter: Remove unnecessary OOM logging messages 2011-11-01 09:19:49 +01:00
xt_LED.c netfilter: xtables: add missing aliases for autoloading via iptables 2011-01-18 06:33:54 +01:00
xt_NFLOG.c netfilter: xtables: substitute temporary defines by final name 2010-05-11 18:31:17 +02:00
xt_NFQUEUE.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
xt_NOTRACK.c netfilter: nf_conntrack: IPS_UNTRACKED bit 2010-06-08 16:09:52 +02:00
xt_RATEEST.c net,rcu: Convert call_rcu(xt_rateest_free_rcu) to kfree_rcu() 2011-07-20 14:10:19 -07:00
xt_SECMARK.c secmark: make secmark object handling generic 2010-10-21 10:12:48 +11:00
xt_TCPMSS.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
xt_TCPOPTSTRIP.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
xt_TEE.c netfilter: ip6_route_output() never returns NULL. 2012-02-22 15:30:15 -05:00
xt_TPROXY.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
xt_TRACE.c netfilter: xtables: substitute temporary defines by final name 2010-05-11 18:31:17 +02:00
xt_addrtype.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
xt_cluster.c netfilter: nf_conntrack: IPS_UNTRACKED bit 2010-06-08 16:09:52 +02:00
xt_comment.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_connbytes.c Merge branch 'nf-next' of git://1984.lsi.us.es/net-next 2011-12-25 02:21:45 -05:00
xt_connlimit.c netfilter: xt_connlimit: remove connlimit_rnd_inited 2011-03-15 13:26:32 +01:00
xt_connmark.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_conntrack.c netfilter: revert a2361c8735 2011-05-10 12:13:36 +02:00
xt_cpu.c netfilter: xtables: add missing aliases for autoloading via iptables 2011-01-18 06:33:54 +01:00
xt_dccp.c netfilter: xtables: change hotdrop pointer to direct modification 2010-05-11 18:35:27 +02:00
xt_devgroup.c netfilter: xtables: add device group match 2011-02-03 00:05:43 +01:00
xt_dscp.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_ecn.c netfilter: xtables: collapse conditions in xt_ecn 2011-12-27 20:45:25 +01:00
xt_esp.c netfilter: xtables: change hotdrop pointer to direct modification 2010-05-11 18:35:27 +02:00
xt_hashlimit.c netfilter: xt_hashlimit: fix unused variable warning if IPv6 disabled 2012-01-16 13:40:54 +01:00
xt_helper.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_hl.c netfilter: Reduce switch/case indent 2011-07-01 16:11:15 -07:00
xt_iprange.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2011-02-04 14:28:58 -08:00
xt_ipvs.c IPVS: netns, use ip_vs_proto_data as param. 2011-01-13 10:30:27 +09:00
xt_length.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_limit.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_mac.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_mark.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_multiport.c netfilter: xtables: change hotdrop pointer to direct modification 2010-05-11 18:35:27 +02:00
xt_nfacct.c netfilter: xtables: add nfacct match to support extended accounting 2011-12-25 02:43:17 +01:00
xt_osf.c net,rcu: convert call_rcu(xt_osf_finger_free_rcu) to kfree_rcu() 2011-05-07 22:51:12 -07:00
xt_owner.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_physdev.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_pkttype.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_policy.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_quota.c net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
xt_rateest.c netfilter: xt_rateest: fix xt_rateest_mt_checkentry() 2011-07-29 16:24:46 +02:00
xt_realm.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_recent.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
xt_repldata.h netfilter: xtables: generate initial table on-demand 2010-02-10 17:50:47 +01:00
xt_sctp.c netfilter: xt_sctp: use WORD_ROUND macro to calculate length of multiple of 4 bytes 2010-06-09 14:47:40 +02:00
xt_set.c Remove redundant linux/version.h includes from net/ 2011-06-21 16:03:17 -07:00
xt_socket.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
xt_state.c netfilter: nf_conntrack: IPS_UNTRACKED bit 2010-06-08 16:09:52 +02:00
xt_statistic.c net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
xt_string.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00
xt_tcpmss.c netfilter: xtables: change hotdrop pointer to direct modification 2010-05-11 18:35:27 +02:00
xt_tcpudp.c netfilter: xtables: change hotdrop pointer to direct modification 2010-05-11 18:35:27 +02:00
xt_time.c netfilter: remove unnecessary returns from void function()s 2010-05-13 15:16:27 +02:00
xt_u32.c netfilter: xtables: deconstify struct xt_action_param for matches 2010-05-11 18:33:37 +02:00