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Patrick McHardy ec68e97ded [NETFILTER]: conntrack: fix {nf,ip}_ct_iterate_cleanup endless loops 
Fix {nf,ip}_ct_iterate_cleanup unconfirmed list handling:

- unconfirmed entries can not be killed manually, they are removed on
  confirmation or final destruction of the conntrack entry, which means
  we might iterate forever without making forward progress.

  This can happen in combination with the conntrack event cache, which
  holds a reference to the conntrack entry, which is only released when
  the packet makes it all the way through the stack or a different
  packet is handled.

- taking references to an unconfirmed entry and using it outside the
  locked section doesn't work, the list entries are not refcounted and
  another CPU might already be waiting to destroy the entry

What the code really wants to do is make sure the references of the hash
table to the selected conntrack entries are released, so they will be
destroyed once all references from skbs and the event cache are dropped.

Since unconfirmed entries haven't even entered the hash yet, simply mark
them as dying and skip confirmation based on that.

Reported and tested by Chuck Ebbert <cebbert@redhat.com>

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-03-05 13:25:18 -08:00
..
bluetooth [PATCH] hci endianness annotations 2006-12-13 09:05:52 -08:00
irda [IRDA] net/irda/: proper prototypes 2007-02-26 11:42:43 -08:00
iucv [S390]: Add AF_IUCV socket support 2007-02-08 13:51:54 -08:00
netfilter [NETFILTER]: conntrack: fix {nf,ip}_ct_iterate_cleanup endless loops 2007-03-05 13:25:18 -08:00
sctp [SCTP]: Correctly handle unexpected INIT-ACK chunk. 2007-01-23 20:25:46 -08:00
tc_act
tipc [TIPC]: endianness annotations 2006-12-02 21:21:08 -08:00
act_api.h
addrconf.h [IPV6]: Misc endianness annotations. 2006-12-02 21:22:52 -08:00
af_unix.h
ah.h
arp.h [IPV6]: Assorted trivial endianness annotations. 2006-12-02 21:22:50 -08:00
atmclip.h [ATM]: Annotations. 2006-12-02 21:22:55 -08:00
ax25.h [PATCH] mark struct file_operations const 1 2007-02-12 09:48:44 -08:00
checksum.h [NET]: Make mangling a checksum (0 -> 0xffff on the wire) explicit. 2006-12-02 21:23:39 -08:00
cipso_ipv4.h NetLabel: use the correct CIPSOv4 MLS label limits 2006-12-02 21:24:12 -08:00
compat.h
datalink.h
dn_dev.h
dn_fib.h
dn_neigh.h
dn_nsp.h
dn_route.h [DECNET]: Convert decnet route to use the new dst_entry 'next' pointer 2007-02-10 23:20:43 -08:00
dn.h [NET]: Reduce sizeof(struct flowi) by 20 bytes. 2006-10-21 20:24:01 -07:00
dsfield.h [NET]: IP header modifier helpers annotations. 2006-12-02 21:23:40 -08:00
dst.h [NET]: Reorder fields of struct dst_entry 2007-02-10 23:20:45 -08:00
esp.h
fib_rules.h [NETLINK]: Do precise netlink message allocations where possible 2006-12-02 21:22:11 -08:00
flow.h [NET]: Rethink mark field in struct flowi 2006-12-02 21:21:39 -08:00
gen_stats.h
genetlink.h [GENETLINK]: Add cmd dump completion. 2006-12-02 21:32:09 -08:00
icmp.h
ieee80211_crypt.h
ieee80211_radiotap.h
ieee80211.h [PATCH] ieee80211: WLAN_GET_SEQ_SEQ fix (select correct region) 2007-01-02 20:56:26 -05:00
ieee80211softmac_wx.h
ieee80211softmac.h WorkStruct: make allyesconfig 2006-11-22 14:57:56 +00:00
if_inet6.h [IPV6]: Per-interface statistics support. 2006-12-02 21:22:08 -08:00
inet6_connection_sock.h [TCP]: Restore SKB socket owner setting in tcp_transmit_skb(). 2007-01-26 01:04:55 -08:00
inet6_hashtables.h [IPV6]: annotate inet6_hashtables 2006-12-02 21:21:10 -08:00
inet_common.h
inet_connection_sock.h [TCP]: Restore SKB socket owner setting in tcp_transmit_skb(). 2007-01-26 01:04:55 -08:00
inet_ecn.h [NET]: IP header modifier helpers annotations. 2006-12-02 21:23:40 -08:00
inet_hashtables.h [NET]: change layout of ehash table 2007-02-08 14:16:46 -08:00
inet_sock.h
inet_timewait_sock.h WorkStruct: Pass the work_struct pointer instead of context data 2006-11-22 14:55:48 +00:00
inetpeer.h [IPV4] inet_peer: Group together avl_left, avl_right, v4daddr to speedup lookups on some CPUS 2006-10-20 00:28:35 -07:00
ip6_checksum.h [IPV6]: Dumb typo in generic csum_ipv6_magic() 2006-12-22 11:12:07 -08:00
ip6_fib.h [IPV6]: Convert ipv6 route to use the new dst_entry 'next' pointer 2007-02-10 23:20:40 -08:00
ip6_route.h [IPV6]: Misc endianness annotations. 2006-12-02 21:22:52 -08:00
ip6_tunnel.h
ip_fib.h [IPV4] nl_fib_lookup: Rename fl_fwmark to fl_mark 2006-12-02 21:21:40 -08:00
ip_mp_alg.h [NET]: Rethink mark field in struct flowi 2006-12-02 21:21:39 -08:00
ip_vs.h [NET]: ipvs checksum annotations. 2006-12-02 21:23:41 -08:00
ip.h [TCP]: Restore SKB socket owner setting in tcp_transmit_skb(). 2007-01-26 01:04:55 -08:00
ipcomp.h
ipconfig.h [NET]: ipconfig and nfsroot annotations 2006-12-02 21:21:09 -08:00
ipip.h [IPV6] net/ipv6/sit.c: make 2 functions static 2006-12-02 21:26:15 -08:00
ipv6.h [IPV6]: __ipv6_addr_diff() annotations and cleanup. 2006-12-02 21:22:53 -08:00
ipx.h [IPX]: Annotate and fix IPX checksum 2006-11-05 14:11:25 -08:00
iw_handler.h
lapb.h
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h
llc_pdu.h [LLC]: anotations 2006-12-02 21:21:23 -08:00
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
llc.h
mip6.h
ndisc.h [IPV6]: Misc endianness annotations. 2006-12-02 21:22:52 -08:00
neighbour.h [NET]: Convert hh_lock to seqlock. 2006-12-08 17:19:20 -08:00
netdma.h
netevent.h
netlabel.h NetLabel: convert to an extensibile/sparse category bitmap 2006-12-02 21:31:36 -08:00
netlink.h [PATCH] severing skbuff.h -> mm.h 2006-12-04 02:00:34 -05:00
netrom.h [PATCH] mark struct file_operations const 1 2007-02-12 09:48:44 -08:00
nexthop.h
p8022.h
pkt_cls.h
pkt_sched.h
protocol.h [INET]: Change protocol field in struct inet_protosw to u16 2006-12-02 21:30:55 -08:00
psnap.h
raw.h
rawv6.h [IPV6]: 'info' argument of ipv6 ->err_handler() is net-endian 2006-12-02 21:21:12 -08:00
red.h
request_sock.h [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
rose.h [PATCH] mark struct file_operations const 1 2007-02-12 09:48:44 -08:00
route.h [IPV4]: Convert ipv4 route to use the new dst_entry 'next' pointer 2007-02-10 23:20:38 -08:00
sch_generic.h [NET_SCHED]: Fix endless loops caused by inaccurate qlen counters (part 1) 2006-12-02 21:31:42 -08:00
scm.h
slhc_vj.h
snmp.h
sock.h [NET]: Fix bugs in "Whether sock accept queue is full" checking 2007-03-02 20:37:33 -08:00
syncppp.h
tcp_ecn.h
tcp_states.h
tcp.h [TCP]: remove tcp header from tcp_v4_check (take #2) 2007-02-08 12:38:44 -08:00
timewait_sock.h [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
transp_v6.h [NET]: Supporting UDP-Lite (RFC 3828) in Linux 2006-12-02 21:22:46 -08:00
udp.h [PATCH] severing skbuff.h -> poll.h 2006-12-04 02:00:31 -05:00
udplite.h [NET]: Fix assorted misannotations (from md5 and udplite merges). 2006-12-02 21:27:16 -08:00
x25.h [X.25]: Adds /proc/sys/net/x25/x25_forward to control forwarding. 2007-02-08 13:34:36 -08:00
x25device.h
xfrm.h [IPSEC]: changing API of xfrm6_tunnel_register 2007-02-13 12:55:55 -08:00