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Pavel Emelyanov 74b0b85b88 tunnels: Fix tunnels change rcu protection 
After making rcu protection for tunnels (ipip, gre, sit and ip6) a bug
was introduced into the SIOCCHGTUNNEL code.

The tunnel is first unlinked, then addresses change, then it is linked
back probably into another bucket. But while changing the parms, the
hash table is unlocked to readers and they can lookup the improper tunnel.

Respective commits are b7285b79 (ipip: get rid of ipip_lock), 1507850b
(gre: get rid of ipgre_lock), 3a43be3c (sit: get rid of ipip6_lock) and
94767632 (ip6tnl: get rid of ip6_tnl_lock).

The quick fix is to wait for quiescent state to pass after unlinking,
but if it is inappropriate I can invent something better, just let me
know.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2010-10-27 14:20:08 -07:00
..
netfilter Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
Kconfig Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
Makefile
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af_inet.c
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ah4.c
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arp.c neigh: Protect neigh->ha[] with a seqlock 2010-10-11 12:54:04 -07:00
cipso_ipv4.c Update broken web addresses in the kernel. 2010-10-18 11:03:14 +02:00
datagram.c
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devinet.c inet: RCU changes in inetdev_by_index() 2010-10-19 03:50:48 -07:00
esp4.c
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fib_frontend.c net: avoid a dev refcount in ip_mc_find_dev() 2010-10-19 03:50:47 -07:00
fib_hash.c fib_hash: fix rcu sparse and logical errors 2010-10-26 11:42:39 -07:00
fib_lookup.h fib: introduce fib_alias_accessed() helper 2010-10-21 03:09:41 -07:00
fib_rules.c fib: RCU conversion of fib_lookup() 2010-10-05 20:39:38 -07:00
fib_semantics.c fib: introduce fib_alias_accessed() helper 2010-10-21 03:09:41 -07:00
fib_trie.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
gre.c tunnels: add _rcu annotations 2010-10-25 13:09:45 -07:00
icmp.c
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igmp.c inet: RCU changes in inetdev_by_index() 2010-10-19 03:50:48 -07:00
inet_connection_sock.c
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inet_diag.c
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inet_fragment.c
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inet_hashtables.c tproxy: fix hash locking issue when using port redirection in __inet_inherit_port() 2010-10-21 13:06:43 +02:00
inet_lro.c
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inet_timewait_sock.c
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inetpeer.c inetpeer: __rcu annotations 2010-10-27 11:37:33 -07:00
ip_forward.c
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ip_fragment.c
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ip_gre.c tunnels: Fix tunnels change rcu protection 2010-10-27 14:20:08 -07:00
ip_input.c
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ip_options.c
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ip_output.c
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ip_sockglue.c ipv4: add __rcu annotations to ip_ra_chain 2010-10-25 14:18:28 -07:00
ipcomp.c
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ipconfig.c
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ipip.c tunnels: Fix tunnels change rcu protection 2010-10-27 14:20:08 -07:00
ipmr.c
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netfilter.c
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proc.c
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protocol.c net: add __rcu annotations to protocol 2010-10-27 11:37:31 -07:00
raw.c
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route.c ipv4: add __rcu annotations to routes.c 2010-10-27 11:37:31 -07:00
syncookies.c
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sysctl_net_ipv4.c
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tcp.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-10-04 11:56:38 -07:00
tcp_bic.c
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tcp_cong.c
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tcp_cubic.c
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tcp_diag.c
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tcp_highspeed.c
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tcp_htcp.c
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tcp_hybla.c
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tcp_illinois.c Update broken web addresses in the kernel. 2010-10-18 11:03:14 +02:00
tcp_input.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
tcp_ipv4.c tproxy: fix hash locking issue when using port redirection in __inet_inherit_port() 2010-10-21 13:06:43 +02:00
tcp_lp.c
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tcp_minisocks.c
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tcp_output.c
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tcp_probe.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
tcp_scalable.c
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tcp_timer.c tcp: use correct counters in CA_CWR state too 2010-10-17 13:46:33 -07:00
tcp_vegas.c
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tcp_vegas.h
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tcp_veno.c Update broken web addresses in the kernel. 2010-10-18 11:03:14 +02:00
tcp_westwood.c
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tcp_yeah.c
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tunnel4.c tunnels: add __rcu annotations 2010-10-27 11:37:32 -07:00
udp.c net: add __rcu annotation to sk_filter 2010-10-25 14:18:28 -07:00
udp_impl.h
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udplite.c
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xfrm4_input.c
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xfrm4_mode_beet.c
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xfrm4_mode_transport.c
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xfrm4_mode_tunnel.c
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xfrm4_output.c
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xfrm4_policy.c net dst: use a percpu_counter to track entries 2010-10-11 13:06:53 -07:00
xfrm4_state.c
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xfrm4_tunnel.c
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