Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423157AbWJTLjK (ORCPT ); Fri, 20 Oct 2006 07:39:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1423160AbWJTLjK (ORCPT ); Fri, 20 Oct 2006 07:39:10 -0400 Received: from xdsl-664.zgora.dialog.net.pl ([81.168.226.152]:54532 "EHLO tuxland.pl") by vger.kernel.org with ESMTP id S1423157AbWJTLjG (ORCPT ); Fri, 20 Oct 2006 07:39:06 -0400 From: Mariusz Kozlowski Organization: tuxland To: Andrew Morton Subject: Re: 2.6.19-rc2-mm2 Date: Fri, 20 Oct 2006 13:39:49 +0200 User-Agent: KMail/1.9.1 Cc: linux-kernel@vger.kernel.org References: <20061020015641.b4ed72e5.akpm@osdl.org> In-Reply-To: <20061020015641.b4ed72e5.akpm@osdl.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200610201339.49190.m.kozlowski@tuxland.pl> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3141 Lines: 84 Hello, I installed 2.6.19-rc2-mm2 without kernel debugging options enabled first. The output below is what I saw when the kernel started. Then I enabled debugging and system hangs with oops with no trace in the logs. It is not easily repeatable though. It happens from time to time. BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000 printing eip: ded5bc12 *pde = 00000000 Oops: 0000 [#1] PREEMPT last sysfs file: /class/pcmcia_socket/pcmcia_socket0/available_resources_setup_done Modules linked in: pcmcia firmware_class yenta_socket rsrc_nonstatic pcmcia_core CPU: 0 EIP: 0060:[] Not tainted VLI EFLAGS: 00010002 (2.6.19-rc2-mm2 #1) EIP is at get_pcmcia_device+0x1e/0x93 [pcmcia] eax: ddba2828 ebx: fffffff0 ecx: 00000000 edx: 00000000 esi: 00000000 edi: 00000000 ebp: 00000246 esp: ddac7f30 ds: 007b es: 007b ss: 0068 Process cardmgr (pid: 4807, ti=ddac6000 task=ddea7030 task.ti=ddac6000) Stack: 40000000 00000000 c00c6409 ddba2828 ded5c777 00000001 00000000 ddba2400 0000000c ddc4930c ded60040 dd5a21c0 bfc9a600 c00c6409 c01661d4 bfc9a600 dd5a21c0 dd5a21c0 00000004 ddac6000 c016622d 00000000 ddea7030 dd5a21c0 Call Trace: [] ds_ioctl+0x88b/0x89f [pcmcia] [] do_ioctl+0x64/0x6d [] vfs_ioctl+0x50/0x27b [] sys_ioctl+0x34/0x50 [] sysenter_past_esp+0x5f/0x85 ======================= Code: 3f e1 89 d8 e8 f6 7e b1 ff 31 c0 5b c3 55 57 56 53 89 d7 9c 5d fa 89 e2 81 e2 00 e0 ff ff 83 42 14 01 8b 90 44 01 00 00 8d 5a f0 <8b> 4b 10 0f 18 01 90 8d b0 44 01 00 00 39 d6 75 12 eb 37 89 c8 EIP: [] get_pcmcia_device+0x1e/0x93 [pcmcia] SS:ESP 0068:ddac7f30 <6>note: cardmgr[4807] exited with preempt_count 1 pccard: PCMCIA card inserted into slot 1 cs: memory probe 0xa0000000-0xa0ffffff: clean. When running without debug options enabled also these were seen amongst dmesg lines: [drm:radeon_cp_init] *ERROR* radeon_cp_init called without lock held [drm:drm_unlock] *ERROR* Process 5131 using kernel context 0 When debug options were enabled these above disappeared. System info: Linux orion 2.6.19-rc2-mm2 #2 PREEMPT Fri Oct 20 13:14:25 CEST 2006 i686 Intel(R) Pentium(R) 4 CPU 2.40GHz GNU/Linux Gnu C 4.1.1 Gnu make 3.81 binutils 2.16.1 util-linux 2.12r mount 2.12r module-init-tools 3.2.2 e2fsprogs 1.39 pcmcia-cs 3.2.8 nfs-utils 1.0.6 Linux C Library > libc.2.4 Dynamic linker (ldd) 2.4 Procps 3.2.6 Net-tools 1.60 Kbd 1.12 Sh-utils 5.94 udev 087 Modules Loaded orinoco_cs orinoco hermes pcmcia firmware_class yenta_socket rsrc_nonstatic pcmcia_core This time it _is_ -mm ;-) Regards, Mariusz Kozlowski - 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/