Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753414AbYCLFxb (ORCPT ); Wed, 12 Mar 2008 01:53:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751833AbYCLFxX (ORCPT ); Wed, 12 Mar 2008 01:53:23 -0400 Received: from www262.sakura.ne.jp ([202.181.97.72]:58539 "EHLO www262.sakura.ne.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751381AbYCLFxX (ORCPT ); Wed, 12 Mar 2008 01:53:23 -0400 Message-Id: <200803120546.m2C5kE8L082233@www262.sakura.ne.jp> Subject: Re: [2.6.25-rc5-mm1] BUG() at mnt_want_write(). From: Tetsuo Handa To: Dave Hansen Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, Christoph Hellwig MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-2022-JP" Content-Transfer-Encoding: 7bit Date: Wed, 12 Mar 2008 14:46:14 +0900 References: <200803120137.m2C1bffL037440@www262.sakura.ne.jp> <1205291010.9828.60.camel@nimitz.home.sr71.net> In-Reply-To: <1205291010.9828.60.camel@nimitz.home.sr71.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6391 Lines: 166 Hello. The file causing BUG seems to be "proc/sys/kernel/real-root-dev", which is not starting with '/'. I think the vfsmount used for name resolution is pointing invalid address. Regards. ---------- dmesg ---------- input: ImPS/2 Generic Wheel Mouse as /class/input/input1 do_sys_open: /dev/ram do_sys_open: /initrd.image RAMDISK: cramfs filesystem found at block 0 RAMDISK: Loading 1060KiB [1 disk] into ram disk... done. VFS: Mounted root (cramfs filesystem) readonly. do_sys_open: / do_sys_open: /old do_sys_open: /dev/console do_sys_open: /etc/ld.so.preload do_sys_open: /etc/ld.so.cache do_sys_open: /lib/tls/i686/mmx/cmov/libc.so.6 do_sys_open: /lib/tls/i686/mmx/libc.so.6 do_sys_open: /lib/tls/i686/cmov/libc.so.6 do_sys_open: /lib/tls/i686/libc.so.6 do_sys_open: /lib/tls/mmx/cmov/libc.so.6 do_sys_open: /lib/tls/mmx/libc.so.6 do_sys_open: /lib/tls/cmov/libc.so.6 do_sys_open: /lib/tls/libc.so.6 do_sys_open: /linuxrc do_sys_open: /etc/ld.so.preload do_sys_open: /etc/ld.so.cache do_sys_open: /lib/tls/i686/mmx/cmov/libblkid.so.1 do_sys_open: /lib/tls/i686/mmx/libblkid.so.1 do_sys_open: /lib/tls/i686/cmov/libblkid.so.1 do_sys_open: /lib/tls/i686/libblkid.so.1 do_sys_open: /lib/tls/mmx/cmov/libblkid.so.1 do_sys_open: /lib/tls/mmx/libblkid.so.1 do_sys_open: /lib/tls/cmov/libblkid.so.1 do_sys_open: /lib/tls/libblkid.so.1 do_sys_open: /lib/i686/mmx/cmov/libblkid.so.1 do_sys_open: /lib/i686/mmx/libblkid.so.1 do_sys_open: /lib/i686/cmov/libblkid.so.1 do_sys_open: /lib/i686/libblkid.so.1 do_sys_open: /lib/mmx/cmov/libblkid.so.1 do_sys_open: /lib/mmx/libblkid.so.1 do_sys_open: /lib/cmov/libblkid.so.1 do_sys_open: /lib/libblkid.so.1 do_sys_open: /lib/tls/libuuid.so.1 do_sys_open: /lib/libuuid.so.1 do_sys_open: /lib/tls/libc.so.6 do_sys_open: /dev/null do_sys_open: /etc/blkid.tab mount used greatest stack depth: 2632 bytes left do_sys_open: /etc/ld.so.preload do_sys_open: /etc/ld.so.cache do_sys_open: /lib/tls/i686/mmx/cmov/libc.so.6 do_sys_open: /lib/tls/i686/mmx/libc.so.6 do_sys_open: /lib/tls/i686/cmov/libc.so.6 do_sys_open: /lib/tls/i686/libc.so.6 do_sys_open: /lib/tls/mmx/cmov/libc.so.6 do_sys_open: /lib/tls/mmx/libc.so.6 do_sys_open: /lib/tls/cmov/libc.so.6 do_sys_open: /lib/tls/libc.so.6 do_sys_open: proc/sys/kernel/real-root-dev do_sys_open: proc/sys/kernel/real-root-dev do_sys_open: /etc/ld.so.preload do_sys_open: /etc/ld.so.cache do_sys_open: /lib/tls/i686/mmx/cmov/libblkid.so.1 do_sys_open: /lib/tls/i686/mmx/libblkid.so.1 do_sys_open: /lib/tls/i686/cmov/libblkid.so.1 do_sys_open: /lib/tls/i686/libblkid.so.1 do_sys_open: /lib/tls/mmx/cmov/libblkid.so.1 do_sys_open: /lib/tls/mmx/libblkid.so.1 do_sys_open: /lib/tls/cmov/libblkid.so.1 do_sys_open: /lib/tls/libblkid.so.1 do_sys_open: /lib/i686/mmx/cmov/libblkid.so.1 do_sys_open: /lib/i686/mmx/libblkid.so.1 do_sys_open: /lib/i686/cmov/libblkid.so.1 do_sys_open: /lib/i686/libblkid.so.1 do_sys_open: /lib/mmx/cmov/libblkid.so.1 do_sys_open: /lib/mmx/libblkid.so.1 do_sys_open: /lib/cmov/libblkid.so.1 do_sys_open: /lib/libblkid.so.1 do_sys_open: /lib/tls/libuuid.so.1 do_sys_open: /lib/libuuid.so.1 do_sys_open: /lib/tls/libc.so.6 do_sys_open: /dev/null do_sys_open: /etc/blkid.tab do_sys_open: bin/root linuxrc used greatest stack depth: 2344 bytes left debug: unmapping init memory c048d000..c051f000 Write protecting the kernel text: 2348k Write protecting the kernel read-only data: 1052k do_sys_open: /dev/console do_sys_open: /etc/ld.so.preload do_sys_open: /etc/ld.so.cache do_sys_open: /lib/tls/i686/mmx/cmov/libc.so.6 do_sys_open: /lib/tls/i686/mmx/libc.so.6 do_sys_open: /lib/tls/i686/cmov/libc.so.6 do_sys_open: /lib/tls/i686/libc.so.6 do_sys_open: /lib/tls/mmx/cmov/libc.so.6 do_sys_open: /lib/tls/mmx/libc.so.6 do_sys_open: /lib/tls/cmov/libc.so.6 do_sys_open: /lib/tls/libc.so.6 do_sys_open: /sbin/init do_sys_open: /linuxrc.conf initrd-tools: 0.1.81.1 do_sys_open: bin/root do_sys_open: /etc/ld.so.preload do_sys_open: /etc/ld.so.cache do_sys_open: /lib/tls/i686/mmx/cmov/libblkid.so.1 do_sys_open: /lib/tls/i686/mmx/libblkid.so.1 do_sys_open: /lib/tls/i686/cmov/libblkid.so.1 do_sys_open: /lib/tls/i686/libblkid.so.1 do_sys_open: /lib/tls/mmx/cmov/libblkid.so.1 do_sys_open: /lib/tls/mmx/libblkid.so.1 do_sys_open: /lib/tls/cmov/libblkid.so.1 do_sys_open: /lib/tls/libblkid.so.1 do_sys_open: /lib/i686/mmx/cmov/libblkid.so.1 do_sys_open: /lib/i686/mmx/libblkid.so.1 do_sys_open: /lib/i686/cmov/libblkid.so.1 do_sys_open: /lib/i686/libblkid.so.1 do_sys_open: /lib/mmx/cmov/libblkid.so.1 do_sys_open: /lib/mmx/libblkid.so.1 do_sys_open: /lib/cmov/libblkid.so.1 do_sys_open: /lib/libblkid.so.1 do_sys_open: /lib/tls/libuuid.so.1 do_sys_open: /lib/libuuid.so.1 do_sys_open: /lib/tls/libc.so.6 do_sys_open: /etc/mtab do_sys_open: proc/sys/kernel/real-root-dev BUG: unable to handle kernel paging request at df368fe8 IP: [] mnt_want_write+0x41/0x5f *pde = 1f884163 *pte = 1f368160 Oops: 0002 [#1] SMP DEBUG_PAGEALLOC last sysfs file: Modules linked in: Pid: 1, comm: init Not tainted (2.6.25-rc5-mm1 #2) EIP: 0060:[] EFLAGS: 00010286 CPU: 0 EIP is at mnt_want_write+0x41/0x5f EAX: 00000000 EBX: c1453460 ECX: 00000001 EDX: df368f78 ESI: df365f78 EDI: 00000000 EBP: df8e1ef0 ESP: df8e1ee4 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Process init (pid: 1, ti=df8e1000 task=df8f8020 task.ti=df8e1000) Stack: ffffffeb 00000200 df8e1f20 df8e1f7c c0173481 ffffa7fe 00000000 ffffff9c c053482b 00008242 00000000 00000002 00008241 df365f78 df56af50 df365f78 df56af50 92aaee34 0000000d df911010 00000300 00000000 00000000 c016a9ca Call Trace: [] ? do_filp_open+0x233/0x52f [] ? get_unused_fd_flags+0xb3/0xbe [] ? do_sys_open+0x50/0xd0 [] ? sys_open+0x16/0x18 [] ? syscall_call+0x7/0xb ======================= Code: 8d 1c 02 89 d8 e8 d3 b4 1c 00 89 f0 e8 7e ff ff ff 85 c0 74 07 bf e2 ff ff ff eb 1f 8b 53 2c 39 f2 74 15 85 d2 74 0e 8b 43 28 90 <01> 42 70 c7 43 28 00 00 00 00 89 73 2c ff 43 28 89 d8 e8 cf b5 EIP: [] mnt_want_write+0x41/0x5f SS:ESP 0068:df8e1ee4 ---[ end trace c340a6739d39d70a ]--- Kernel panic - not syncing: Attempted to kill init! -- 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/