Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751862Ab3EPRlu (ORCPT ); Thu, 16 May 2013 13:41:50 -0400 Received: from vserver.eikelenboom.it ([84.200.39.61]:41524 "EHLO smtp.eikelenboom.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750835Ab3EPRlt (ORCPT ); Thu, 16 May 2013 13:41:49 -0400 Date: Thu, 16 May 2013 19:41:42 +0200 From: Sander Eikelenboom Organization: Eikelenboom IT services X-Priority: 3 (Normal) Message-ID: <1139404719.20130516194142@eikelenboom.it> To: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org CC: Hans Verkuil , Mauro Carvalho Chehab Subject: [media] cx25821 regression from 3.9: BUG: bad unlock balance detected! MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2894 Lines: 55 Hi Hans / Mauro, With 3.10.0-rc1 (including the cx25821 changes from Hans), I get the bug below which wasn't present with 3.9. -- Sander [ 53.004968] ===================================== [ 53.004968] [ BUG: bad unlock balance detected! ] [ 53.004968] 3.10.0-rc1-20130516-jens+ #1 Not tainted [ 53.004968] ------------------------------------- [ 53.004968] motion/3328 is trying to release lock (&dev->lock) at: [ 53.004968] [] mutex_unlock+0x9/0x10 [ 53.004968] but there are no more locks to release! [ 53.004968] [ 53.004968] other info that might help us debug this: [ 53.004968] 1 lock held by motion/3328: [ 53.004968] #0: (&mm->mmap_sem){++++++}, at: [] vm_munmap+0x3e/0x70 [ 53.004968] [ 53.004968] stack backtrace: [ 53.004968] CPU: 1 PID: 3328 Comm: motion Not tainted 3.10.0-rc1-20130516-jens+ #1 [ 53.004968] Hardware name: Xen HVM domU, BIOS 4.3-unstable 05/16/2013 [ 53.004968] ffffffff819be5f9 ffff88002ac35c58 ffffffff819b9029 ffff88002ac35c88 [ 53.004968] ffffffff810e615e ffff88002ac35cb8 ffff88002b7c18a8 ffffffff819be5f9 [ 53.004968] 00000000ffffffff ffff88002ac35d28 ffffffff810eb17e ffffffff810e7ba5 [ 53.004968] Call Trace: [ 53.004968] [] ? mutex_unlock+0x9/0x10 [ 53.004968] [] dump_stack+0x19/0x1b [ 53.004968] [] print_unlock_imbalance_bug+0xfe/0x110 [ 53.004968] [] ? mutex_unlock+0x9/0x10 [ 53.004968] [] lock_release_non_nested+0x1ce/0x320 [ 53.004968] [] ? debug_check_no_locks_freed+0x105/0x1b0 [ 53.353529] [] ? mutex_unlock+0x9/0x10 [ 53.353529] [] lock_release+0xfc/0x250 [ 53.353529] [] __mutex_unlock_slowpath+0xb2/0x1f0 [ 53.353529] [] mutex_unlock+0x9/0x10 [ 53.353529] [] videobuf_waiton+0x55/0x230 [ 53.353529] [] ? tlb_finish_mmu+0x32/0x50 [ 53.353529] [] ? unmap_region+0xc6/0x100 [ 53.353529] [] ? kmem_cache_free+0x195/0x230 [ 53.353529] [] cx25821_free_buffer+0x49/0xa0 [ 53.353529] [] cx25821_buffer_release+0x9/0x10 [ 53.353529] [] videobuf_vm_close+0xc5/0x160 [ 53.353529] [] remove_vma+0x25/0x60 [ 53.353529] [] do_munmap+0x307/0x410 [ 53.353529] [] vm_munmap+0x4c/0x70 [ 53.353529] [] SyS_munmap+0x9/0x10 [ 53.353529] [] system_call_fastpath+0x16/0x1b -- 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/