linux-kernel - 2.6.36-rc1 ip6tables-resto: inconsistent lock state

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Message-ID: <4C6AC2F8.90307@odi.ch>
Date:	Tue, 17 Aug 2010 19:12:24 +0200
From:	Ortwin Glück <odi@....ch>
To:	linux-kernel@...r.kernel.org
CC:	netfilter-devel@...r.kernel.org
Subject: 2.6.36-rc1 ip6tables-resto: inconsistent lock state


=================================
[ INFO: inconsistent lock state ]
2.6.36-rc1 #1
---------------------------------
inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
ip6tables-resto/3098 [HC0[0]:SC0[0]:HE1:SE1] takes:
 (&(&lock->lock)->rlock){+.?...}, at: [<c152ae2c>] get_counters+0xcc/0x160
{IN-SOFTIRQ-W} state was registered at:
  [<c108df53>] __lock_acquire+0x9b3/0x1850
  [<c108ee54>] lock_acquire+0x64/0x80
  [<c159817d>] _raw_spin_lock+0x3d/0x50
  [<c152b99f>] ip6t_do_table+0x5f/0x440
  [<c152c932>] ip6table_filter_hook+0x22/0x30
  [<c148e5f1>] nf_iterate+0x71/0x90
  [<c148e90f>] nf_hook_slow+0xcf/0x120
  [<c151c996>] mld_sendpack+0x276/0x4d0
  [<c151d338>] mld_ifc_timer_expire+0x258/0x2f0
  [<c106bd70>] run_timer_softirq+0x130/0x280
  [<c10668b1>] __do_softirq+0x91/0x130
  [<c10669ad>] do_softirq+0x5d/0x70
  [<c1066bd5>] irq_exit+0x75/0x80
  [<c1042166>] smp_apic_timer_interrupt+0x56/0x90
  [<c159927f>] apic_timer_interrupt+0x2f/0x34
  [<c159817d>] _raw_spin_lock+0x3d/0x50
  [<c10fa92a>] __d_lookup+0xca/0x160
  [<c10f095d>] do_lookup+0x3d/0x1c0
  [<c10f2706>] link_path_walk+0x3a6/0xa40
  [<c10f2ea4>] path_walk+0x44/0xa0
  [<c10f2fd1>] do_path_lookup+0x51/0x60
  [<c10f3acc>] user_path_at+0x3c/0x80
  [<c10e6e0a>] sys_faccessat+0x9a/0x180
  [<c10e6f10>] sys_access+0x20/0x30
  [<c1598e25>] syscall_call+0x7/0xb
irq event stamp: 5463
hardirqs last  enabled at (5463): [<c1066d22>] local_bh_enable+0x62/0xe0
hardirqs last disabled at (5461): [<c1066ce4>] local_bh_enable+0x24/0xe0
softirqs last  enabled at (5462): [<c152addd>] get_counters+0x7d/0x160
softirqs last disabled at (5460): [<c152ad86>] get_counters+0x26/0x160

other info that might help us debug this:
2 locks held by ip6tables-resto/3098:
 #0:  (sk_lock-AF_INET6){+.+.+.}, at: [<c150ea18>] ipv6_getsockopt+0x98/0xe0
 #1:  (&xt[i].mutex){+.+.+.}, at: [<c149f8fc>] xt_find_table_lock+0x2c/0xe0

stack backtrace:
Pid: 3098, comm: ip6tables-resto Not tainted 2.6.36-rc1 #1
Call Trace:
 [<c1594e46>] ? printk+0x18/0x1a
 [<c108be3c>] print_usage_bug+0x15c/0x1a0
 [<c108c225>] mark_lock+0x3a5/0x5b0
 [<c108cbb0>] ? check_usage_backwards+0x0/0xe0
 [<c108df94>] __lock_acquire+0x9f4/0x1850
 [<c11df263>] ? rb_insert_color+0xd3/0x110
 [<c10e1fdf>] ? __kmalloc+0x6f/0xf0
 [<c108ee54>] lock_acquire+0x64/0x80
 [<c152ae2c>] ? get_counters+0xcc/0x160
 [<c159817d>] _raw_spin_lock+0x3d/0x50
 [<c152ae2c>] ? get_counters+0xcc/0x160
 [<c152ae2c>] get_counters+0xcc/0x160
 [<c152c37d>] do_ip6t_get_ctl+0x1ad/0x2d0
 [<c159691a>] ? mutex_lock_interruptible_nested+0x23a/0x3c0
 [<c148fd35>] nf_sockopt+0x105/0x180
 [<c1066d0a>] ? local_bh_enable+0x4a/0xe0
 [<c148fdd4>] nf_getsockopt+0x24/0x30
 [<c150ea33>] ipv6_getsockopt+0xb3/0xe0
 [<c1516bab>] rawv6_getsockopt+0x3b/0x170
 [<c10c8efa>] ? might_fault+0x5a/0xb0
 [<c1468692>] sock_common_getsockopt+0x22/0x30
 [<c1466bcc>] sys_getsockopt+0x4c/0xa0
 [<c14680bc>] sys_socketcall+0xfc/0x270
 [<c1029010>] sysenter_do_call+0x12/0x36


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