From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161030AbVJHAxg (ORCPT ); Fri, 7 Oct 2005 20:53:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161028AbVJHAxg (ORCPT ); Fri, 7 Oct 2005 20:53:36 -0400 Received: from zproxy.gmail.com ([64.233.162.203]:24208 "EHLO zproxy.gmail.com") by vger.kernel.org with ESMTP id S1161026AbVJHAxe convert rfc822-to-8bit (ORCPT ); Fri, 7 Oct 2005 20:53:34 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=PWKDcCJKRmPrXhIPd4toRjsOjI/YnwOo5SgKgjHo2BUAG7EOgXagKJ9wM414c09ohJbQi5pziBtyZMTqlnykIHN9pAv/6KqqYtg74D71LpCKWvDezsgGqVgUByMED1ew3nG85FQweIrlDhbHsyFLyrfEYqbTrGMtwuIOvy77kjg= Message-ID: Date: Fri, 7 Oct 2005 17:53:34 -0700 From: Joshua Hudson Reply-To: Joshua Hudson To: linux-kernel@vger.kernel.org Subject: How to interpret a kernel bug output from dmesg? MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I got this. Probably I caused it. Kernel is 2.6.13, slightly modified (weird new psuedo filesystem). Problem is I don't know how to read it. I wouldn't recommend looking for it yourself: I doubt you will find anything. Yes, I compiled with DEBUG_DCACHE (or something similar, uncommented the debug define at the top of dcache.c). I ran dmesg -c just before the ls that crashed, and dmesg right afterwards. Nothing else present. ------------[ cut here ]------------ kernel BUG at include/linux/dcache.h:294! invalid operand: 0000 [#1] PREEMPT Modules linked in: CPU: 0 EIP: 0060:[] Not tainted VLI EFLAGS: 00010246 (2.6.13c1) EIP is at __link_path_walk+0xd03/0xe60 eax: 00000000 ebx: ce054014 ecx: 00000001 edx: cdd392fc esi: ce1b7000 edi: ce1ffecc ebp: ce1b7f10 esp: ce1b7e24 ds: 007b es: 007b ss: 0068 Process ls (pid: 258, threadinfo=ce1b7000 task=ce2eaae0) Stack: 00000001 ce1b7e50 ce1b7e48 cdd392fc ce1b7e5c ce1b7e54 c02ac704 00000000 00000000 cfee48c0 ce1ffecc 00017c88 00000002 ce054012 c0169a73 ce1b7f10 ce1b7f50 ce1b7ebc ce1b7e7c c01608c7 ce00b294 ce054000 ce00b294 cfee48c0 Call Trace: [] dput+0x33/0x280 [] link_path_walk+0x47/0xe0 [] path_lookup+0x8c/0x160 [] __user_walk+0x33/0x60 [] vfs_lstat+0x1c/0x60 [] sys_lstat64+0x1b/0x40 [] sys_fcntl+0x2d/0x60 [] syscall_call+0x7/0xb Code: 2a ff 02 89 55 00 b8 01 00 00 00 e8 78 de fa ff 8b 46 08 a8 08 75 0d 89 3c 24 e8 29 93 00 00 e9 75 ff ff ff e8 8f 22 11 00 eb ec <0f> 0b 26 01 8e e6 27 c0 eb cc e8 7e 22 11 00 e9 97 fe ff ff 8b <6>note: ls[258] exited with preempt_count 1