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Date: Sat, 2 Sep 2006 01:11:30 -0700
From: "Miles Lane" <miles.lane@...il.com>
To: "Andrew Morton" <akpm@...l.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: 2.6.18-rc5-mm1 -- possible circular locking dependency detected
=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.18-rc5-mm1 #6
-------------------------------------------------------
wpa_supplicant/4658 is trying to acquire lock:
(crypto_alg_sem){----}, at: [__crypto_lookup_template+20/168]
__crypto_lookup_template+0x14/0xa8
but task is already holding lock:
((crypto_chain).rwsem){----}, at:
[blocking_notifier_call_chain+14/45]
blocking_notifier_call_chain+0xe/0x2d
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 ((crypto_chain).rwsem){----}:
[add_lock_to_list+95/125] add_lock_to_list+0x5f/0x7d
[__lock_acquire+2327/2552] __lock_acquire+0x917/0x9f8
[lock_acquire+86/116] lock_acquire+0x56/0x74
[down_read+39/57] down_read+0x27/0x39
[blocking_notifier_call_chain+14/45]
blocking_notifier_call_chain+0xe/0x2d
[crypto_register_template+79/99] crypto_register_template+0x4f/0x63
[hmac_module_init+13/15] hmac_module_init+0xd/0xf
[init+141/531] init+0x8d/0x213
[kernel_thread_helper+7/16] kernel_thread_helper+0x7/0x10
[save_stack_trace+25/51] save_stack_trace+0x19/0x33
[save_trace+63/200] save_trace+0x3f/0xc8
[add_lock_to_list+95/125] add_lock_to_list+0x5f/0x7d
[__lock_acquire+2327/2552] __lock_acquire+0x917/0x9f8
[lock_acquire+86/116] lock_acquire+0x56/0x74
[down_read+39/57] down_read+0x27/0x39
[blocking_notifier_call_chain+14/45]
blocking_notifier_call_chain+0xe/0x2d
[crypto_register_template+79/99] crypto_register_template+0x4f/0x63
[hmac_module_init+13/15] hmac_module_init+0xd/0xf
[init+141/531] init+0x8d/0x213
[kernel_thread_helper+7/16] kernel_thread_helper+0x7/0x10
[<ffffffff>] 0xffffffff
-> #0 (crypto_alg_sem){----}:
[print_circular_bug_tail+48/100] print_circular_bug_tail+0x30/0x64
[__lock_acquire+2126/2552] __lock_acquire+0x84e/0x9f8
[lock_acquire+86/116] lock_acquire+0x56/0x74
[down_read+39/57] down_read+0x27/0x39
[__crypto_lookup_template+20/168] __crypto_lookup_template+0x14/0xa8
[crypto_lookup_template+14/37] crypto_lookup_template+0xe/0x25
[pg0+927817926/1051247616] cryptomgr_notify+0xc6/0x1e0 [cryptomgr]
[notifier_call_chain+24/50] notifier_call_chain+0x18/0x32
[blocking_notifier_call_chain+28/45]
blocking_notifier_call_chain+0x1c/0x2d
[crypto_alg_mod_lookup+347/481] crypto_alg_mod_lookup+0x15b/0x1e1
[crypto_alloc_base+21/96] crypto_alloc_base+0x15/0x60
[prism2_wep_init+50/107] prism2_wep_init+0x32/0x6b
[ieee80211_wx_set_encodeext+733/1345]
ieee80211_wx_set_encodeext+0x2dd/0x541
[pg0+928579102/1051247616] bcm43xx_wx_set_encodingext+0x1f/0x21 [bcm43xx]
[ioctl_standard_call+365/563] ioctl_standard_call+0x16d/0x233
[wireless_process_ioctl+87/799] wireless_process_ioctl+0x57/0x31f
[dev_ioctl+1072/1137] dev_ioctl+0x430/0x471
[sock_ioctl+437/458] sock_ioctl+0x1b5/0x1ca
[do_ioctl+36/102] do_ioctl+0x24/0x66
[vfs_ioctl+600/619] vfs_ioctl+0x258/0x26b
[sys_ioctl+70/99] sys_ioctl+0x46/0x63
[sysenter_past_esp+86/141] sysenter_past_esp+0x56/0x8d
[save_stack_trace+25/51] save_stack_trace+0x19/0x33
[save_trace+63/200] save_trace+0x3f/0xc8
[print_circular_bug_tail+48/100] print_circular_bug_tail+0x30/0x64
[__lock_acquire+2126/2552] __lock_acquire+0x84e/0x9f8
[lock_acquire+86/116] lock_acquire+0x56/0x74
[down_read+39/57] down_read+0x27/0x39
[__crypto_lookup_template+20/168] __crypto_lookup_template+0x14/0xa8
[crypto_lookup_template+14/37] crypto_lookup_template+0xe/0x25
[pg0+927817926/1051247616] cryptomgr_notify+0xc6/0x1e0 [cryptomgr]
[notifier_call_chain+24/50] notifier_call_chain+0x18/0x32
[blocking_notifier_call_chain+28/45]
blocking_notifier_call_chain+0x1c/0x2d
[crypto_alg_mod_lookup+347/481] crypto_alg_mod_lookup+0x15b/0x1e1
[crypto_alloc_base+21/96] crypto_alloc_base+0x15/0x60
[prism2_wep_init+50/107] prism2_wep_init+0x32/0x6b
[ieee80211_wx_set_encodeext+733/1345]
ieee80211_wx_set_encodeext+0x2dd/0x541
[pg0+928579102/1051247616] bcm43xx_wx_set_encodingext+0x1f/0x21 [bcm43xx]
[ioctl_standard_call+365/563] ioctl_standard_call+0x16d/0x233
[wireless_process_ioctl+87/799] wireless_process_ioctl+0x57/0x31f
[dev_ioctl+1072/1137] dev_ioctl+0x430/0x471
[sock_ioctl+437/458] sock_ioctl+0x1b5/0x1ca
[do_ioctl+36/102] do_ioctl+0x24/0x66
[vfs_ioctl+600/619] vfs_ioctl+0x258/0x26b
[sys_ioctl+70/99] sys_ioctl+0x46/0x63
[sysenter_past_esp+86/141] sysenter_past_esp+0x56/0x8d
[<ffffffff>] 0xffffffff
other info that might help us debug this:
2 locks held by wpa_supplicant/4658:
#0: (rtnl_mutex){--..}, at: [mutex_lock+25/32] mutex_lock+0x19/0x20
#1: ((crypto_chain).rwsem){----}, at:
[blocking_notifier_call_chain+14/45]
blocking_notifier_call_chain+0xe/0x2d
stack backtrace:
[dump_trace+105/439] dump_trace+0x69/0x1b7
[show_trace_log_lvl+21/40] show_trace_log_lvl+0x15/0x28
[show_trace+22/25] show_trace+0x16/0x19
[dump_stack+24/29] dump_stack+0x18/0x1d
[print_circular_bug_tail+89/100] print_circular_bug_tail+0x59/0x64
[__lock_acquire+2126/2552] __lock_acquire+0x84e/0x9f8
[lock_acquire+86/116] lock_acquire+0x56/0x74
[down_read+39/57] down_read+0x27/0x39
[__crypto_lookup_template+20/168] __crypto_lookup_template+0x14/0xa8
[crypto_lookup_template+14/37] crypto_lookup_template+0xe/0x25
[pg0+927817926/1051247616] cryptomgr_notify+0xc6/0x1e0 [cryptomgr]
[notifier_call_chain+24/50] notifier_call_chain+0x18/0x32
[blocking_notifier_call_chain+28/45] blocking_notifier_call_chain+0x1c/0x2d
[crypto_alg_mod_lookup+347/481] crypto_alg_mod_lookup+0x15b/0x1e1
[crypto_alloc_base+21/96] crypto_alloc_base+0x15/0x60
[prism2_wep_init+50/107] prism2_wep_init+0x32/0x6b
[ieee80211_wx_set_encodeext+733/1345] ieee80211_wx_set_encodeext+0x2dd/0x541
[pg0+928579102/1051247616] bcm43xx_wx_set_encodingext+0x1f/0x21 [bcm43xx]
[ioctl_standard_call+365/563] ioctl_standard_call+0x16d/0x233
[wireless_process_ioctl+87/799] wireless_process_ioctl+0x57/0x31f
[dev_ioctl+1072/1137] dev_ioctl+0x430/0x471
[sock_ioctl+437/458] sock_ioctl+0x1b5/0x1ca
[do_ioctl+36/102] do_ioctl+0x24/0x66
[vfs_ioctl+600/619] vfs_ioctl+0x258/0x26b
[sys_ioctl+70/99] sys_ioctl+0x46/0x63
[sysenter_past_esp+86/141] sysenter_past_esp+0x56/0x8d
DWARF2 unwinder stuck at sysenter_past_esp+0x56/0x8d
Leftover inexact backtrace:
[show_trace_log_lvl+21/40] show_trace_log_lvl+0x15/0x28
[show_trace+22/25] show_trace+0x16/0x19
[dump_stack+24/29] dump_stack+0x18/0x1d
[print_circular_bug_tail+89/100] print_circular_bug_tail+0x59/0x64
[__lock_acquire+2126/2552] __lock_acquire+0x84e/0x9f8
[lock_acquire+86/116] lock_acquire+0x56/0x74
[down_read+39/57] down_read+0x27/0x39
[__crypto_lookup_template+20/168] __crypto_lookup_template+0x14/0xa8
[crypto_lookup_template+14/37] crypto_lookup_template+0xe/0x25
[pg0+927817926/1051247616] cryptomgr_notify+0xc6/0x1e0 [cryptomgr]
[notifier_call_chain+24/50] notifier_call_chain+0x18/0x32
[blocking_notifier_call_chain+28/45] blocking_notifier_call_chain+0x1c/0x2d
[crypto_alg_mod_lookup+347/481] crypto_alg_mod_lookup+0x15b/0x1e1
[crypto_alloc_base+21/96] crypto_alloc_base+0x15/0x60
[prism2_wep_init+50/107] prism2_wep_init+0x32/0x6b
[ieee80211_wx_set_encodeext+733/1345] ieee80211_wx_set_encodeext+0x2dd/0x541
[pg0+928579102/1051247616] bcm43xx_wx_set_encodingext+0x1f/0x21 [bcm43xx]
[ioctl_standard_call+365/563] ioctl_standard_call+0x16d/0x233
[wireless_process_ioctl+87/799] wireless_process_ioctl+0x57/0x31f
[dev_ioctl+1072/1137] dev_ioctl+0x430/0x471
[sock_ioctl+437/458] sock_ioctl+0x1b5/0x1ca
[do_ioctl+36/102] do_ioctl+0x24/0x66
[vfs_ioctl+600/619] vfs_ioctl+0x258/0x26b
[sys_ioctl+70/99] sys_ioctl+0x46/0x63
[sysenter_past_esp+86/141] sysenter_past_esp+0x56/0x8d
=======================
--
VGER BF report: H 2.60902e-15
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