Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753906Ab0H0B4q (ORCPT ); Thu, 26 Aug 2010 21:56:46 -0400 Received: from mail-ww0-f44.google.com ([74.125.82.44]:48118 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753151Ab0H0B4o (ORCPT ); Thu, 26 Aug 2010 21:56:44 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=HQlP0NcrV77HMm5C/hyb+bghqgI+pwSEX6UqTKTBRV/03PbuphPcaHCfXemyLCWaOq vyPxNPdukEsU1MzBg7aBHt1QWt+5BJMGCJ2czgM2DuExSEHdUAQKr2WxchB0iiZUqTW+ eLQjw5T36HfTaqvuhAp+bnuFzc3OYXzcgpLCI= MIME-Version: 1.0 Date: Thu, 26 Aug 2010 21:56:42 -0400 Message-ID: Subject: 2.6.36-rc2-git4 - INFO: possible circular locking dependency detected From: Miles Lane To: LKML , Johannes Berg Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4982 Lines: 105 [ INFO: possible circular locking dependency detected ] 2.6.36-rc2-git4 #12 ------------------------------------------------------- kworker/0:3/3630 is trying to acquire lock: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x12/0x14 but task is already holding lock: (rfkill_global_mutex){+.+.+.}, at: [] rfkill_switch_all+0x24/0x49 [rfkill] which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (rfkill_global_mutex){+.+.+.}: [] lock_acquire+0x120/0x15b [] __mutex_lock_common+0x54/0x52e [] mutex_lock_nested+0x34/0x39 [] rfkill_register+0x2b/0x29c [rfkill] [] wiphy_register+0x1ae/0x270 [cfg80211] [] ieee80211_register_hw+0x1b4/0x3cf [mac80211] [] iwl_ucode_callback+0x9e9/0xae3 [iwlagn] [] request_firmware_work_func+0x54/0x6f [] kthread+0x8c/0x94 [] kernel_thread_helper+0x4/0x10 -> #1 (cfg80211_mutex){+.+.+.}: [] lock_acquire+0x120/0x15b [] __mutex_lock_common+0x54/0x52e [] mutex_lock_nested+0x34/0x39 [] cfg80211_get_dev_from_ifindex+0x1b/0x7c [cfg80211] [] cfg80211_wext_giwscan+0x58/0x990 [cfg80211] [] ioctl_standard_iw_point+0x1a8/0x272 [] ioctl_standard_call+0x91/0xa7 [] T.723+0xbd/0x12c [] wext_handle_ioctl+0x31/0x6d [] dev_ioctl+0x63d/0x67a [] sock_ioctl+0x48/0x21d [] do_vfs_ioctl+0x4ba/0x509 [] sys_ioctl+0x51/0x74 [] system_call_fastpath+0x16/0x1b -> #0 (rtnl_mutex){+.+.+.}: [] __lock_acquire+0xa93/0xd9a [] lock_acquire+0x120/0x15b [] __mutex_lock_common+0x54/0x52e [] mutex_lock_nested+0x34/0x39 [] rtnl_lock+0x12/0x14 [] cfg80211_rfkill_set_block+0x1a/0x7b [cfg80211] [] rfkill_set_block+0x80/0xd5 [rfkill] [] __rfkill_switch_all+0x3f/0x6f [rfkill] [] rfkill_switch_all+0x38/0x49 [rfkill] [] rfkill_op_handler+0x105/0x136 [rfkill] [] process_one_work+0x248/0x403 [] worker_thread+0x139/0x214 [] kthread+0x8c/0x94 [] kernel_thread_helper+0x4/0x10 other info that might help us debug this: 3 locks held by kworker/0:3/3630: #0: (events){+.+.+.}, at: [] process_one_work+0x178/0x403 #1: ((rfkill_op_work).work){+.+...}, at: [] process_one_work+0x178/0x403 #2: (rfkill_global_mutex){+.+.+.}, at: [] rfkill_switch_all+0x24/0x49 [rfkill] stack backtrace: Pid: 3630, comm: kworker/0:3 Not tainted 2.6.36-rc2-git4 #12 Call Trace: [] print_circular_bug+0xa8/0xb7 [] __lock_acquire+0xa93/0xd9a [] ? __bfs+0x23/0x1d8 [] ? rtnl_lock+0x12/0x14 [] lock_acquire+0x120/0x15b [] ? rtnl_lock+0x12/0x14 [] ? rtnl_lock+0x12/0x14 [] __mutex_lock_common+0x54/0x52e [] ? rtnl_lock+0x12/0x14 [] ? rfkill_switch_all+0x24/0x49 [rfkill] [] ? mark_lock+0x2d/0x233 [] ? rfkill_op_handler+0x0/0x136 [rfkill] [] mutex_lock_nested+0x34/0x39 [] rtnl_lock+0x12/0x14 [] cfg80211_rfkill_set_block+0x1a/0x7b [cfg80211] [] rfkill_set_block+0x80/0xd5 [rfkill] [] __rfkill_switch_all+0x3f/0x6f [rfkill] [] rfkill_switch_all+0x38/0x49 [rfkill] [] rfkill_op_handler+0x105/0x136 [rfkill] [] process_one_work+0x248/0x403 [] ? process_one_work+0x178/0x403 [] worker_thread+0x139/0x214 [] ? worker_thread+0x0/0x214 [] kthread+0x8c/0x94 [] kernel_thread_helper+0x4/0x10 [] ? restore_args+0x0/0x30 [] ? kthread+0x0/0x94 [] ? kernel_thread_helper+0x0/0x10 wlan0: deauthenticating from 00:1b:2f:0e:ed:ba by local choice (reason=3) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/