2.6.28 bug occured during losetup -d /dev/loop0

[wolfgang]

Hi,

losetup -d /dev/loop0 was hanging and I got
the the messages appended in dmesg.out.

I hope this information might be useful. If
it happends again I will try to collect
more information.

regards

  W. Rohrmoser


 
If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.
 
Linux medion 2.6.28-medion #1 PREEMPT Sun Jan 18 14:45:17 CET 2009 i686 GNU/Linux
 
Gnu C                  4.3.2
Gnu make               3.81
binutils               2.18.0.20080103
util-linux             2.13.1.1
mount                  2.13.1.1
module-init-tools      3.4
e2fsprogs              1.41.3
reiserfsprogs          3.6.19
PPP                    2.4.4
Linux C Library        2.7
Dynamic linker (ldd)   2.7
Procps                 3.2.7
Net-tools              1.60
Console-tools          0.2.3
Sh-utils               6.10
udev                   125
Modules Loaded         loop xt_multiport iptable_filter ip_tables x_tables binfmt_misc nvidia i2c_core ppdev lp nfsd exportfs nfs lockd sunrpc deflate zlib_deflate ctr twofish twofish_common camellia serpent blowfish des_generic cbc aes_i586 aes_generic xcbc rmd160 sha256_generic sha1_generic md5 crypto_null ext3 jbd fuse dm_crypt dm_snapshot dm_mirror dm_region_hash dm_log dm_mod snd_pcm_oss snd_mixer_oss usbhid gspca_zc3xx gspca_main videodev v4l1_compat snd_cmipci snd_pcm snd_page_alloc snd_opl3_lib snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi snd_seq_dummy rtc_cmos rtc_core rtc_lib snd_seq_oss snd_seq_midi_event pcspkr snd_seq snd_timer snd_seq_device snd uhci_hcd soundcore ohci_hcd ohci1394 ehci_hcd 8139too mii ieee1394 sym53c8xx scsi_transport_spi usbcore ide_cd_mod fan 8250_pnp 8250 serial_core parport_pc parport thermal processor button thermal_sys intel_agp agpgart
lp0: using parport0 (interrupt-driven).
lp0: console ready
ppdev: user-space parallel port driver
warning: `avahi-daemon' uses 32-bit capabilities (legacy support in use)
nvidia: module license 'NVIDIA' taints kernel.
nvidia 0000:01:00.0: PCI INT A -> Link[LNKA] -> GSI 11 (level, low) -> IRQ 11
NVRM: loading NVIDIA Linux x86 Kernel Module  96.43.09  Mon Oct 27 14:23:30 PST 2008
agpgart-intel 0000:00:00.0: AGP 2.0 bridge
agpgart-intel 0000:00:00.0: putting AGP V2 device into 4x mode
nvidia 0000:01:00.0: putting AGP V2 device into 4x mode
ip_tables: (C) 2000-2006 Netfilter Core Team
loop: module loaded
EXT3-fs warning: maximal mount count reached, running e2fsck is recommended
kjournald starting.  Commit interval 5 seconds
EXT3 FS on dm-0, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
EXT3-fs warning: maximal mount count reached, running e2fsck is recommended
kjournald starting.  Commit interval 5 seconds
EXT3 FS on dm-0, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
BUG: unable to handle kernel NULL pointer dereference at 00000004
IP: [<c0141c1e>] mempool_free+0xa/0x81
*pde = 00000000 
Oops: 0000 [#1] PREEMPT 
last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:02:00.1/pools
Modules linked in: loop xt_multiport iptable_filter ip_tables x_tables binfmt_misc nvidia(P) i2c_core ppdev lp nfsd exportfs nfs lockd sunrpc deflate zlib_deflate ctr twofish twofish_common camellia serpent blowfish des_generic cbc aes_i586 aes_generic xcbc rmd160 sha256_generic sha1_generic md5 crypto_null ext3 jbd fuse dm_crypt dm_snapshot dm_mirror dm_region_hash dm_log dm_mod snd_pcm_oss snd_mixer_oss usbhid gspca_zc3xx gspca_main videodev v4l1_compat snd_cmipci snd_pcm snd_page_alloc snd_opl3_lib snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi snd_seq_dummy rtc_cmos rtc_core rtc_lib snd_seq_oss snd_seq_midi_event pcspkr snd_seq snd_timer snd_seq_device snd uhci_hcd soundcore ohci_hcd ohci1394 ehci_hcd 8139too mii ieee1394 sym53c8xx scsi_transport_spi usbcore ide_cd_mod fan 8250_pnp 8250 serial_core parport_pc parport thermal processor button thermal_sys intel_agp agpgart

Pid: 27368, comm: loop0 Tainted: P           (2.6.28-medion #1)  
EIP: 0060:[<c0141c1e>] EFLAGS: 00010286 CPU: 0
EIP is at mempool_free+0xa/0x81
EAX: c75069c0 EBX: 00000000 ECX: 00000000 EDX: 00000000
ESI: c75069c0 EDI: 00101800 EBP: 00000000 ESP: d0a0bf5c
 DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
Process loop0 (pid: 27368, ti=d0a0a000 task=e36d83b0 task.ti=d0a0a000)
Stack:
 f0f5661a 00000000 c017b558 00000000 f0ebe917 d0a0bfb4 d2b7a908 d2b7a800
 c3370480 00001000 00000000 c77b751c f0ebe3ed 00000000 00000001 00000001
 00000000 00000000 00000000 d0a0bfb4 00145400 00000000 d2b7a800 c11fa900
Call Trace:
 [<f0f5661a>] crypt_endio+0x0/0xc7 [dm_crypt]
 [<c017b558>] bio_endio+0x27/0x29
 [<f0ebe917>] loop_thread+0x3ac/0x3e2 [loop]
 [<f0ebe3ed>] do_lo_send_aops+0x0/0x17e [loop]
 [<f0ebe56b>] loop_thread+0x0/0x3e2 [loop]
 [<c012570c>] kthread+0x36/0x5a
 [<c01256d6>] kthread+0x0/0x5a
 [<c0104423>] kernel_thread_helper+0x7/0x10
Code: 53 9d 89 e0 25 00 e0 ff ff ff 48 14 f6 40 08 08 74 05 e8 67 c0 17 00 31 c0 83 c4 0c 5b 5e 5f 5d c3 56 53 89 c6 89 d3 85 c0 74 74 <8b> 42 04 3b 02 7d 65 9c 59 fa 89 e0 25 00 e0 ff ff ff 40 14 8b 
EIP: [<c0141c1e>] mempool_free+0xa/0x81 SS:ESP 0068:d0a0bf5c
---[ end trace f619812d1cd509ee ]---