Bug#534690: marked as done (linux-image-2.6.30-1-686: unable to unmount a loop device)
Your message dated Thu, 25 Feb 2010 21:33:59 +0100
with message-id <20100225203359.GA3777@galadriel.inutil.org>
and subject line Re: Bug#534690: linux-image-2.6.30-1-686: unable to unmount a loop device
has caused the Debian Bug report #534690,
regarding linux-image-2.6.30-1-686: unable to unmount a loop device
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
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--
534690: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=534690
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message ---
- To: Debian Bug Tracking System <submit@bugs.debian.org>
- Subject: linux-image-2.6.30-1-686: unable to unmount a loop device
- From: Jakub Wilk <ubanus@users.sf.net>
- Date: Fri, 26 Jun 2009 13:50:01 +0200
- Message-id: <20090626115001.GA3651@cavendish.icomputing.pl>
Package: linux-image-2.6.30-1-686
Version: 2.6.30-1
Severity: normal
# lsmod | grep -c loop
0
# modprobe loop max_part=8
# dd if=/dev/zero of=/tmp/fs bs=1M count=1
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.00407344 s, 257 MB/s
# mke2fs -F -q /tmp/fs
# mkdir /tmp/mnt/
# mount -o loop /tmp/fs /tmp/mnt/
# umount /tmp/mnt/
[ 284.509864] BUG: unable to handle kernel NULL pointer dereference at 00000060
[ 284.509902] IP: [<c01f6f27>] blkdev_ioctl+0x25/0x842
[ 284.509929] *pde = 00000000
[ 284.509944] Oops: 0000 [#1] SMP
[ 284.509963] last sysfs file: /sys/devices/virtual/block/loop0/removable
[ 284.509980] Modules linked in: loop ext2 tun kvm_amd kvm binfmt_misc nf_conntrack_ipv6 ip6table_filter ip6_tables nvidiafb fb_ddc vgastate xt_MARK iptable_mangle iptable_nat nf_nat ipt_REJECT xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack iptable_filter ip_tables x_tables fuse snd_hda_codec_realtek tvaudio tda7432 tuner_simple tuner_types tuner arc4 ecb snd_hda_intel snd_hda_codec bttv ir_common snd_hwdep i2c_algo_bit v4l2_common videodev v4l1_compat snd_pcm videobuf_dma_sg snd_seq snd_timer snd_seq_device rt61pci crc_itu_t rt2x00pci snd videobuf_core btcx_risc rt2x00lib soundcore snd_page_alloc led_class input_polldev mac80211 tveeprom cfg80211 eeprom_93cx6 i2c_nforce2 i2c_core evdev processor button k8temp serio_raw psmouse ext3 jbd mbcache ide_gd_mod ide_cd_mod cdrom ata_generic libata scsi_mod ide_pci_generic amd74xx forcedeth ide_core ohci_hcd ehci_hcd usbcore floppy thermal fan thermal_sys [last unloaded: loop]
[ 284.510570]
[ 284.510581] Pid: 3328, comm: umount Not tainted (2.6.30-1-686 #1) M61SME-S2
[ 284.510600] EIP: 0060:[<c01f6f27>] EFLAGS: 00010287 CPU: 1
[ 284.510617] EIP is at blkdev_ioctl+0x25/0x842
[ 284.510630] EAX: 00000000 EBX: 0000125f ECX: 0000125f EDX: 00000000
[ 284.510645] ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: c3fefe08
[ 284.510662] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 284.510677] Process umount (pid: 3328, ti=c3fee000 task=c3d2e750 task.ti=c3fee000)
[ 284.510694] Stack:
[ 284.510704] c011dda9 c04ca6ec c3d2e750 c3cacc80 00000000 c3cacc80 c3cacc80 c04951c0
[ 284.510756] c031ce8e c38630c0 00000b00 c04951c0 00000000 00000212 00000000 c3d2e904
[ 284.510814] 00000001 00000246 3e1b71e2 00000042 c040c840 0000000c c017160e 0000000c
[ 284.510876] Call Trace:
[ 284.510886] [<c011dda9>] ? pick_next_task_fair+0x80/0x87
[ 284.510909] [<c031ce8e>] ? __schedule+0x719/0x746
[ 284.510931] [<c017160e>] ? release_pages+0x11c/0x124
[ 284.510953] [<c011cc82>] ? update_curr+0x58/0x178
[ 284.510973] [<c031cec0>] ? schedule+0x5/0x13
[ 284.510991] [<c031cfeb>] ? schedule_timeout+0x14/0xbd
[ 284.511011] [<c011cf9e>] ? check_preempt_wakeup+0x139/0x173
[ 284.511031] [<c031c6c7>] ? wait_for_common+0xc1/0x112
[ 284.511051] [<c0121ee3>] ? default_wake_function+0x0/0x8
[ 284.511075] [<c01a9eac>] ? ioctl_by_bdev+0x20/0x2f
[ 284.511096] [<f8463f90>] ? loop_clr_fd+0x186/0x1a2 [loop]
[ 284.511119] [<f8463fdb>] ? lo_release+0x2f/0x53 [loop]
[ 284.511141] [<c01aa955>] ? __blkdev_put+0x7a/0x10f
[ 284.511160] [<c01ba4dd>] ? vfs_quota_off+0x0/0xd
[ 284.511183] [<c018f4ad>] ? deactivate_super+0x4a/0x61
[ 284.511204] [<c019e6d5>] ? sys_umount+0x29a/0x2c0
[ 284.511225] [<c019e706>] ? sys_oldumount+0xb/0xe
[ 284.511243] [<c0103014>] ? sysenter_do_call+0x12/0x28
[ 284.511264] Code: 40 e9 30 57 f2 ff 55 89 d5 57 56 89 c6 53 89 cb 81 ec f0 00 00 00 81 f9 65 12 00 00 89 44 24 38 8b bc 24 04 01 00 00 89 44 24 10 <8b> 50 60 0f 84 cb 03 00 00 77 79 81 f9 60 12 00 00 0f 84 77 07
[ 284.511591] EIP: [<c01f6f27>] blkdev_ioctl+0x25/0x842 SS:ESP 0068:c3fefe08
[ 284.511618] CR2: 0000000000000060
[ 284.511631] ---[ end trace 35bc3eb2ec9cc947 ]---
Killed
-- Package-specific info:
** Version:
Linux version 2.6.30-1-686 (Debian 2.6.30-1) (waldi@debian.org) (gcc version 4.3.3 (Debian 4.3.3-11) ) #1 SMP Sun Jun 14 16:11:32 UTC 2009
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (900, 'unstable'), (500, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.30-1-686 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages linux-image-2.6.30-1-686 depends on:
ii debconf [debconf-2.0] 1.5.26 Debian configuration management sy
ii initramfs-tools [linux-initra 0.93.3 tools for generating an initramfs
ii module-init-tools 3.9-2 tools for managing Linux kernel mo
Versions of packages linux-image-2.6.30-1-686 recommends:
ii libc6-i686 2.9-18 GNU C Library: Shared libraries [i
Versions of packages linux-image-2.6.30-1-686 suggests:
ii lilo 1:22.8-7 LInux LOader - The Classic OS load
pn linux-doc-2.6.30 <none> (no description available)
-- debconf-show failed
--
Jakub Wilk
--- End Message ---
--- Begin Message ---
- To: Jakub Wilk <ubanus@users.sf.net>
- Cc: 534690-done@bugs.debian.org
- Subject: Re: Bug#534690: linux-image-2.6.30-1-686: unable to unmount a loop device
- From: Moritz Muehlenhoff <jmm@inutil.org>
- Date: Thu, 25 Feb 2010 21:33:59 +0100
- Message-id: <20100225203359.GA3777@galadriel.inutil.org>
- In-reply-to: <20090628075011.GA7976@cavendish.icomputing.pl>
- References: <20090626115001.GA3651@cavendish.icomputing.pl> <1246156257.7980.233.camel@deadeye> <20090628075011.GA7976@cavendish.icomputing.pl>
Version: 2.6.32-1
On Sun, Jun 28, 2009 at 09:50:11AM +0200, Jakub Wilk wrote:
> * Ben Hutchings <ben@decadent.org.uk>, 2009-06-28, 03:30:
> >>Package: linux-image-2.6.30-1-686
> >>Version: 2.6.30-1
> >>Severity: normal
> >>
> >># lsmod | grep -c loop
> >>0
> >>
> >># modprobe loop max_part=8
> >>
> >># dd if=/dev/zero of=/tmp/fs bs=1M count=1
> >>1+0 records in
> >>1+0 records out
> >>1048576 bytes (1.0 MB) copied, 0.00407344 s, 257 MB/s
> >>
> >># mke2fs -F -q /tmp/fs
> >>
> >># mkdir /tmp/mnt/
> >>
> >># mount -o loop /tmp/fs /tmp/mnt/
> >>
> >># umount /tmp/mnt/
> >
> >If I have understood this bug correctly, it is only triggered if the
> >max_part parameter to the loop module is not zero.
> That's right.
>
> >So until it is fixed you should be able to work around it by not
> >setting that parameter.
> >(But if you really need it, sorry, you'll have to wait.)
> I sometimes really need it. Probably I could manage this by
> reloading the module, but that's quite cumbersome.
>
> Thanks anyway.
I cannot reproduce the bug with current 2.6.32, closing.
Please reopen if you're still running into this.
Cheers,
Moritz
--- End Message ---
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