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13475a30b6
linux/net/ipv6
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Eric Dumazet 13475a30b6 tcp: connect() race with timewait reuse 
Its currently possible that several threads issuing a connect() find
the same timewait socket and try to reuse it, leading to list
corruptions.

Condition for bug is that these threads bound their socket on same
address/port of to-be-find timewait socket, and connected to same
target. (SO_REUSEADDR needed)

To fix this problem, we could unhash timewait socket while holding
ehash lock, to make sure lookups/changes will be serialized. Only
first thread finds the timewait socket, other ones find the
established socket and return an EADDRNOTAVAIL error.

This second version takes into account Evgeniy's review and makes sure
inet_twsk_put() is called outside of locked sections.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-03 16:17:43 -08:00
..
netfilter Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6 2009-12-03 13:23:12 -08:00
addrconf_core.c [IPV6]: ipv6_addr_type() doesn't know about RFC4193 addresses. 2007-07-31 02:28:21 -07:00
addrconf.c net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
addrlabel.c net: replace %p6 with %pI6 2008-10-29 12:52:50 -07:00
af_inet6.c net: check kern before calling security subsystem 2009-11-05 22:18:18 -08:00
ah6.c xfrm: Use the user specified truncation length in ESP and AH 2009-11-25 15:48:41 -08:00
anycast.c ipv6: use RCU to walk list of network devices 2009-11-13 20:38:49 -08:00
datagram.c ipv6: no more dev_put() in datagram_send_ctl() 2009-11-02 03:42:41 -08:00
esp6.c xfrm: Use the user specified truncation length in ESP and AH 2009-11-25 15:48:41 -08:00
exthdrs_core.c [NET] IPV6: Fix whitespace errors. 2007-02-10 23:19:42 -08:00
exthdrs.c net: constify struct inet6_protocol 2009-09-14 17:03:05 -07:00
fib6_rules.c net: Allow fib_rule_unregister to batch 2009-12-03 12:22:55 -08:00
icmp.c net: constify struct inet6_protocol 2009-09-14 17:03:05 -07:00
inet6_connection_sock.c net: IPv6 changes 2009-10-20 18:55:45 -07:00
inet6_hashtables.c tcp: connect() race with timewait reuse 2009-12-03 16:17:43 -08:00
ip6_fib.c xfrm: select sane defaults for xfrm[4|6] gc_thresh 2009-07-30 18:52:15 -07:00
ip6_flowlabel.c net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
ip6_input.c net: constify struct inet6_protocol 2009-09-14 17:03:05 -07:00
ip6_output.c ip: Report qdisc packet drops 2009-09-02 18:05:33 -07:00
ip6_tunnel.c net: Simplify ip6_tunnel pernet operations. 2009-12-01 16:15:59 -08:00
ip6mr.c ip6mr: Optimize multiple unregistration 2009-10-29 01:13:53 -07:00
ipcomp6.c net: constify struct inet6_protocol 2009-09-14 17:03:05 -07:00
ipv6_sockglue.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-10-27 01:03:26 -07:00
Kconfig IPv6: Fix 6RD typo 2009-10-07 14:50:30 -07:00
Makefile [IPV6] MROUTE: Support multicast forwarding. 2008-04-05 22:33:38 +09:00
mcast.c ipv6: use RCU to walk list of network devices 2009-11-13 20:38:49 -08:00
mip6.c ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
ndisc.c make TLLAO option for NA packets configurable 2009-10-07 01:10:45 -07:00
netfilter.c net: skb->dst accessors 2009-06-03 02:51:04 -07:00
proc.c net: mark read-only arrays as const 2009-08-05 10:42:58 -07:00
protocol.c net: constify struct inet6_protocol 2009-09-14 17:03:05 -07:00
raw.c ipv6: avoid dev_hold()/dev_put() in rawv6_bind() 2009-11-08 00:43:18 -08:00
reassembly.c net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
route.c IPv6: use ipv6_addr_copy() in ip6_route_redirect() 2009-10-07 13:58:01 -07:00
sit.c net: Simplify ipip6 aka sit pernet operations. 2009-12-01 16:15:59 -08:00
syncookies.c TCPCT part 1g: Responder Cookie => Initiator 2009-12-02 22:07:26 -08:00
sysctl_net_ipv6.c inet6: functions shadow global variable 2009-08-02 12:54:30 -07:00
tcp_ipv6.c net: Batch inet_twsk_purge 2009-12-03 12:23:47 -08:00
tunnel6.c net: constify struct inet6_protocol 2009-09-14 17:03:05 -07:00
udp_impl.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
udp.c IPv6: use ipv6_addr_v4mapped() 2009-11-10 20:54:44 -08:00
udplite.c net: drop capability from protocol definitions 2009-11-05 21:40:17 -08:00
xfrm6_input.c netns xfrm: per-netns MIBs 2008-11-25 17:59:52 -08:00
xfrm6_mode_beet.c ipsec: Interfamily IPSec BEET, ipv4-inner ipv6-outer 2008-08-06 02:40:25 -07:00
xfrm6_mode_ro.c [IPSEC]: Make x->lastused an unsigned long 2008-01-28 14:53:52 -08:00
xfrm6_mode_transport.c [IPSEC]: Use IPv6 calling convention as the convention for x->mode->output 2007-10-10 16:55:54 -07:00
xfrm6_mode_tunnel.c net: skb->dst accessors 2009-06-03 02:51:04 -07:00
xfrm6_output.c net: skb->dst accessors 2009-06-03 02:51:04 -07:00
xfrm6_policy.c xfrm6: Fix xfrm6_policy.c build when SYSCTL disabled. 2009-08-04 20:32:16 -07:00
xfrm6_state.c ipv6: fix sparse warning: Using plain integer as NULL pointer 2009-02-21 23:37:10 -08:00
xfrm6_tunnel.c xfrm6_tunnel: RCU conversion 2009-10-24 06:07:57 -07:00