From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Jones Subject: bluetooth lockdep trace. (.25rc5-git4) Date: Thu, 27 Mar 2008 12:21:56 -0400 Message-ID: <20080327162156.GA8098@codemonkey.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: netdev@vger.kernel.org Return-path: Received: from testure.choralone.org ([194.9.77.134]:45409 "EHLO testure.choralone.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756352AbYC0QWE (ORCPT ); Thu, 27 Mar 2008 12:22:04 -0400 Received: from c-66-30-206-50.hsd1.ma.comcast.net ([66.30.206.50] helo=gelk.kernelslacker.org) by testure.choralone.org with esmtpsa (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.69) (envelope-from ) id 1Jeunf-0007jz-Sx for netdev@vger.kernel.org; Thu, 27 Mar 2008 16:18:00 +0000 Received: from davej by gelk.kernelslacker.org with local (Exim 4.68) (envelope-from ) id 1JeurU-0006AA-KK for netdev@vger.kernel.org; Thu, 27 Mar 2008 12:21:56 -0400 Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: This came in this morning from a user of a slightly old kernel now, but I don't see anything obvious post rc5 that would fix this. Dave Mar 27 08:10:57 localhost kernel: ============================================= Mar 27 08:10:57 localhost kernel: [ INFO: possible recursive locking detected ] Mar 27 08:10:57 localhost kernel: 2.6.25-0.121.rc5.git4.fc9 #1 Mar 27 08:10:57 localhost kernel: --------------------------------------------- Mar 27 08:10:57 localhost kernel: obex-data-serve/3611 is trying to acquire lock: Mar 27 08:10:57 localhost kernel: (sk_lock-AF_BLUETOOTH){--..}, at: [] l2cap_sock_bind+0x29/0x108 [l2cap] Mar 27 08:10:57 localhost kernel: Mar 27 08:10:57 localhost kernel: but task is already holding lock: Mar 27 08:10:57 localhost kernel: (sk_lock-AF_BLUETOOTH){--..}, at: [] rfcomm_sock_connect+0x35/0xc2 [rfcomm] Mar 27 08:10:57 localhost kernel: Mar 27 08:10:57 localhost kernel: other info that might help us debug this: Mar 27 08:10:57 localhost kernel: 2 locks held by obex-data-serve/3611: Mar 27 08:10:57 localhost kernel: #0: (sk_lock-AF_BLUETOOTH){--..}, at: [] rfcomm_sock_connect+0x35/0xc2 [rfcomm] Mar 27 08:10:57 localhost kernel: #1: (rfcomm_mutex){--..}, at: [] rfcomm_dlc_open+0x28/0x294 [rfcomm] Mar 27 08:10:57 localhost kernel: Mar 27 08:10:57 localhost kernel: stack backtrace: Mar 27 08:10:57 localhost kernel: Pid: 3611, comm: obex-data-serve Not tainted 2.6.25-0.121.rc5.git4.fc9 #1 Mar 27 08:10:57 localhost kernel: [__lock_acquire+2287/3089] __lock_acquire+0x8ef/0xc11 Mar 27 08:10:57 localhost kernel: [sched_clock+8/11] ? sched_clock+0x8/0xb Mar 27 08:10:57 localhost kernel: [lock_acquire+106/144] lock_acquire+0x6a/0x90 Mar 27 08:10:57 localhost kernel: [] ? l2cap_sock_bind+0x29/0x108 [l2cap] Mar 27 08:10:57 localhost kernel: [lock_sock_nested+182/198] lock_sock_nested+0xb6/0xc6 Mar 27 08:10:57 localhost kernel: [] ? l2cap_sock_bind+0x29/0x108 [l2cap] Mar 27 08:10:57 localhost kernel: [security_socket_post_create+22/27] ? security_socket_post_create+0x16/0x1b Mar 27 08:10:57 localhost kernel: [__sock_create+388/472] ? __sock_create+0x184/0x1d8 Mar 27 08:10:57 localhost kernel: [] l2cap_sock_bind+0x29/0x108 [l2cap] Mar 27 08:10:57 localhost kernel: [kernel_bind+10/13] kernel_bind+0xa/0xd Mar 27 08:10:57 localhost kernel: [] rfcomm_dlc_open+0xc8/0x294 [rfcomm] Mar 27 08:10:57 localhost kernel: [lock_sock_nested+187/198] ? lock_sock_nested+0xbb/0xc6 Mar 27 08:10:57 localhost kernel: [] rfcomm_sock_connect+0x8b/0xc2 [rfcomm] Mar 27 08:10:57 localhost kernel: [sys_connect+96/125] sys_connect+0x60/0x7d Mar 27 08:10:57 localhost kernel: [__lock_acquire+1370/3089] ? __lock_acquire+0x55a/0xc11 Mar 27 08:10:57 localhost kernel: [sys_socketcall+140/392] sys_socketcall+0x8c/0x188 Mar 27 08:10:57 localhost kernel: [syscall_call+7/11] syscall_call+0x7/0xb Mar 27 08:10:57 localhost kernel: ======================= -- http://www.codemonkey.org.uk