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Jozsef Kadlecsik 7d367e0668 netfilter: ctnetlink: fix soft lockup when netlink adds new entries (v2) 
Marcell Zambo and Janos Farago noticed and reported that when
new conntrack entries are added via netlink and the conntrack table
gets full, soft lockup happens. This is because the nf_conntrack_lock
is held while nf_conntrack_alloc is called, which is in turn wants
to lock nf_conntrack_lock while evicting entries from the full table.

The patch fixes the soft lockup with limiting the holding of the
nf_conntrack_lock to the minimum, where it's absolutely required.
It required to extend (and thus change) nf_conntrack_hash_insert
so that it makes sure conntrack and ctnetlink do not add the same entry
twice to the conntrack table.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
 		2012-02-24 12:24:15 +01:00
..
9p 9p: Reduce object size with CONFIG_NET_9P_DEBUG 2012-01-05 10:51:44 -06:00
bluetooth Bluetooth: Remove usage of __cancel_delayed_work() 2012-02-15 13:09:26 +02:00
caif caif-spi: Bugfix for dump upon device removal 2011-12-06 13:34:12 -05:00
irda Fix common misspellings 2011-03-31 11:26:23 -03:00
iucv af_iucv: get rid of state IUCV_SEVERED 2011-12-20 14:05:03 -05:00
netfilter netfilter: ctnetlink: fix soft lockup when netlink adds new entries (v2) 2012-02-24 12:24:15 +01:00
netns netns: Fail conspicously if someone uses net_generic at an inappropriate time. 2012-01-27 21:06:02 -05:00
nfc NFC: Export a new attribute nfcid1 in target info 2012-01-04 14:30:43 -05:00
phonet net: dont hold rtnl mutex during netlink dump callbacks 2011-05-02 15:26:28 -07:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2011-12-23 17:13:56 -05:00
tc_act
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act_api.h net: sched: constify tcf_proto and tc_action 2011-07-06 02:52:16 -07:00
addrconf.h ipv6: Check RA for sllao when configuring optimistic ipv6 address (v2) 2012-01-04 15:53:20 -05:00
af_ieee802154.h
…
af_rxrpc.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
af_unix.h af_unix: Move CINQ/COUTQ code to helpers 2011-12-30 16:45:45 -05:00
ah.h ipsec: update MAX_AH_AUTH_LEN to support sha512 2011-01-13 21:48:25 -08:00
arp.h ipv6: Use universal hash for NDISC. 2011-12-28 15:06:58 -05:00
atmclip.h atm: clip: Use device neigh support on top of "arp_tbl". 2011-11-30 18:51:03 -05:00
ax25.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
ax88796.h
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cfg80211-wext.h cfg80211: remove unused wext handler exports 2011-08-08 14:26:29 -04:00
cfg80211.h kernel-doc: fix new warnings in cfg80211.h 2012-01-23 08:44:54 -08:00
checksum.h
…
cipso_ipv4.h doc: Update the email address for Paul Moore in various source files 2011-08-01 17:58:33 -07:00
cls_cgroup.h
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compat.h net: Add sendmmsg socket system call 2011-05-05 11:10:14 -07:00
datalink.h
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dcbevent.h dcb: Add stub routines for !CONFIG_DCB 2011-10-06 15:49:51 -04:00
dcbnl.h dcb: add DCBX mode to event notifier attributes 2011-10-06 15:49:51 -04:00
dn.h decnet: Convert to use flowidn where applicable. 2011-03-12 15:08:55 -08:00
dn_dev.h
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dn_fib.h decnet: Convert to use flowidn where applicable. 2011-03-12 15:08:55 -08:00
dn_neigh.h
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dn_nsp.h
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dn_route.h decnet: Convert to use flowidn where applicable. 2011-03-12 15:08:55 -08:00
dsa.h dsa: Include linux/if_ether.h to fix build error 2011-12-01 11:41:06 -05:00
dsfield.h
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dst.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2011-12-23 17:13:56 -05:00
dst_ops.h net: Rename the dst_opt default_mtu method to mtu 2011-11-26 14:29:50 -05:00
esp.h
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ethoc.h
…
fib_rules.h
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flow.h ipv4: reset flowi parameters on route connect 2012-02-04 19:29:48 -05:00
flow_keys.h flow_dissector: use a 64bit load/store 2011-11-29 13:17:03 -05:00
garp.h garp: remove last synchronize_rcu() call 2011-05-12 17:46:56 -04:00
gen_stats.h Fix common misspellings 2011-03-31 11:26:23 -03:00
genetlink.h genetlink: Add genl_notify() 2011-12-03 09:35:05 -08:00
gre.h
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icmp.h ipv4: reduce percpu needs for icmpmsg mibs 2011-11-09 16:04:20 -05:00
ieee80211_radiotap.h wireless: move ieee80211chan2mhz macro 2011-11-11 12:32:50 -05:00
ieee802154.h 6LoWPAN: add fragmentation support 2011-11-14 00:19:42 -05:00
ieee802154_netdev.h
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if_inet6.h ipv6: updates to privacy addresses per RFC 4941. 2011-08-01 18:05:00 -07:00
inet6_connection_sock.h inet: Pass flowi to ->queue_xmit(). 2011-05-08 15:28:28 -07:00
inet6_hashtables.h net: use IS_ENABLED(CONFIG_IPV6) 2011-12-11 18:25:16 -05:00
inet_common.h
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inet_connection_sock.h net: rename sk_clone to sk_clone_lock 2011-11-08 17:07:07 -05:00
inet_ecn.h inet: add rfc 3168 extract in front of INET_ECN_encapsulate() 2011-10-22 01:25:23 -04:00
inet_frag.h
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inet_hashtables.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
inet_sock.h net: use IS_ENABLED(CONFIG_IPV6) 2011-12-11 18:25:16 -05:00
inet_timewait_sock.h inet: remove rcu protection on tw_net 2011-12-14 13:34:55 -05:00
inetpeer.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2011-12-02 13:49:21 -05:00
ip.h net: use IS_ENABLED(CONFIG_IPV6) 2011-12-11 18:25:16 -05:00
ip6_checksum.h
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ip6_fib.h IPv6: Avoid taking write lock for /proc/net/ipv6_route 2011-12-30 17:07:33 -05:00
ip6_route.h Merge branch 'nf-next' of git://1984.lsi.us.es/net-next 2011-12-25 02:21:45 -05:00
ip6_tunnel.h
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ip_fib.h ipv4: Call fib_select_default() only when actually necessary. 2011-04-14 15:05:22 -07:00
ip_vs.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-01-02 18:56:49 -05:00
ipcomp.h
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ipconfig.h
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ipip.h
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ipv6.h ipv6: Add fragment reporting to ipv6_skip_exthdr(). 2011-12-03 09:35:10 -08:00
ipx.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
iw_handler.h Fix common misspellings 2011-03-31 11:26:23 -03:00
lapb.h wan: make LAPB callbacks const 2011-09-16 19:20:20 -04:00
lib80211.h include: replace linux/module.h with "struct module" wherever possible 2011-10-31 19:32:32 -04:00
llc.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
llc_c_ac.h
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llc_c_ev.h
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llc_c_st.h
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llc_conn.h
…
llc_if.h
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llc_pdu.h bonding,llc: Fix structure sizeof incompatibility for some PDUs 2011-05-13 15:13:24 -04:00
llc_s_ac.h
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llc_s_ev.h
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llc_s_st.h
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llc_sap.h
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mac80211.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-01-08 13:21:22 -08:00
mip6.h
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mld.h
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ndisc.h ipv6: Create fast inline ipv6 neigh lookup just like ipv4. 2011-12-28 15:41:23 -05:00
neighbour.h ipv6: Use universal hash for NDISC. 2011-12-28 15:06:58 -05:00
net_namespace.h net: use IS_ENABLED(CONFIG_IPV6) 2011-12-11 18:25:16 -05:00
net_ratelimit.h net: Kill ratelimit.h dependency in linux/net.h 2011-05-27 13:41:33 -04:00
netdma.h
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netevent.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
netlabel.h doc: Update the email address for Paul Moore in various source files 2011-08-01 17:58:33 -07:00
netlink.h netlink: clarify attribute length check documentation 2011-11-04 17:48:23 -04:00
netprio_cgroup.h netprio_cgroup: fix wrong memory access when NETPRIO_CGROUP=m 2012-02-10 15:08:57 -05:00
netrom.h
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nexthop.h
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nl802154.h
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p8022.h
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ping.h net: ping: fix build failure 2011-05-17 14:16:58 -04:00
pkt_cls.h net: Fix range checks in tcf_valid_offset(). 2010-12-21 12:43:16 -08:00
pkt_sched.h net: sched: constify tcf_proto and tc_action 2011-07-06 02:52:16 -07:00
protocol.h net: use IS_ENABLED(CONFIG_IPV6) 2011-12-11 18:25:16 -05:00
psnap.h
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raw.h
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rawv6.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
red.h net_sched: sfq: add optional RED on top of SFQ 2012-01-12 20:05:28 -08:00
regulatory.h cfg80211: pass DFS region to drivers through reg_notifier() 2011-11-21 16:20:41 -05:00
request_sock.h tcp: Change possible SYN flooding messages 2011-09-15 14:49:43 -04:00
rose.h rose: Add length checks to CALL_REQUEST parsing 2011-03-27 17:59:04 -07:00
route.h ipv4: reset flowi parameters on route connect 2012-02-04 19:29:48 -05:00
rtnetlink.h rtnetlink: Fix problem with buffer allocation 2012-02-21 16:56:45 -05:00
sch_generic.h net: Make qdisc_skb_cb upper size bound explicit. 2012-02-09 13:50:34 -05:00
scm.h af_unix: dont send SCM_CREDENTIALS by default 2011-09-28 13:29:50 -04:00
secure_seq.h tcp: add const qualifiers where possible 2011-10-21 05:22:42 -04:00
slhc_vj.h
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snmp.h Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2012-01-09 13:08:28 -08:00
sock.h net: explicitly add jump_label.h header to sock.h 2012-01-26 17:13:26 -05:00
stp.h
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tcp.h net: Disambiguate kernel message 2012-02-01 14:41:50 -05:00
tcp_memcontrol.h tcp buffer limitation: per-cgroup limit 2011-12-12 19:04:11 -05:00
tcp_states.h
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timewait_sock.h timewait_sock: Create and use getpeer op. 2010-12-01 18:09:13 -08:00
transp_v6.h net: relax PKTINFO non local ipv6 udp xmit check 2011-08-30 17:39:01 -04:00
udp.h net: use IS_ENABLED(CONFIG_IPV6) 2011-12-11 18:25:16 -05:00
udplite.h udplite: fast-path computation of checksum coverage 2011-10-17 19:07:30 -04:00
wext.h
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wimax.h net: wimax: Remove of unused 'rfkill_input' pointer 2011-06-24 17:50:44 -07:00
wpan-phy.h Fix common misspellings 2011-03-31 11:26:23 -03:00
x25.h X25 remove bkl in subscription ioctls 2010-11-28 11:12:20 -08:00
x25device.h
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xfrm.h net: remove ipv6_addr_copy() 2011-11-22 16:43:32 -05:00