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Old 11-29-2007, 09:49 AM
"Elena of Valhalla"
Default Bug#453393: linux-image-2.6.18-5-686: kernel bug at lookup.c with unionfs (and squashfs)

Package: linux-image-2.6.18-5-686
Version: 2.6.18.dfsg.1-13
Severity: important

I have added an unionfs branch to an existing one mounted on /
it seems to work, but after a while the following message spontaneously
appears in the opened tty and in dmesg

------------[ cut here ]------------
kernel BUG at /build/buildd/linux-modules-extra-2.6-2.6.18/debian/build/build_i3
invalid opcode: 0000 [#1]
Modules linked in: squashfs loop nls_iso8859_1 nls_cp437 vfat fat dm_snapshot dm
_mirror dm_mod sd_mod snd_hda_intel snd_hda_codec rtc parport_pc parport snd_pcm
snd_timer snd soundcore psmouse pcspkr snd_page_alloc serio_raw shpchp pci_hotp
lug tsdev evdev ext2 mbcache usbhid ide_disk usb_storage scsi_mod ide_generic 81
39too 8139cp mii ehci_hcd uhci_hcd usbcore generic ide_core thermal processor fa
n unionfs
CPU: 0
EIP: 0060:[<de836fbb>] Not tainted VLI
EFLAGS: 00010202 (2.6.18-5-686 #1)
EIP is at unionfs_lookup_backend+0x1da/0x735 [unionfs]
eax: 00000001 ebx: dd7d2ae0 ecx: 00000002 edx: 00000002
esi: dd7d2b41 edi: de83a4a8 ebp: dd7d2b40 esp: ddd79d80
ds: 007b es: 007b ss: 0068
Process cron (pid: 2056, ti=ddd78000 task=ddbdeaa0 task.ti=ddd78000)
Stack: 00000001 00007231 00000000 ddcaccf0 00000002 00000002 00000000 ffffffff
00000000 00000001 00000000 00000008 0000000b dcef7e5c 00000008 00000292
ddb700c0 dd2c0844 ddd79e44 00000292 ddcaccf0 00000000 c016da85 ddcaccf0
Call Trace:
[<c016da85>] d_alloc+0x142/0x18f
[<c016537c>] do_lookup+0xa3/0x135
[<c0166f45>] __link_path_walk+0x865/0xd1d
[<c0116d0a>] find_busiest_group+0x177/0x46a
[<c0167446>] link_path_walk+0x49/0xbd
[<c012fbe1>] enqueue_hrtimer+0x4b/0x6a
[<c012fd27>] lock_hrtimer_base+0x19/0x35
[<c012fdc9>] hrtimer_try_to_cancel+0x3c/0x42
[<c012fdd9>] hrtimer_cancel+0xa/0x14
[<c027fb55>] do_nanosleep+0x43/0x6a
[<c012fee0>] hrtimer_nanosleep+0x3d/0xf0
[<c016780f>] do_path_lookup+0x20a/0x225
[<c0167f46>] __user_walk_fd+0x29/0x3f
[<c0161e99>] vfs_stat_fd+0x15/0x3c
[<c012fbe1>] enqueue_hrtimer+0x4b/0x6a
[<c012fd27>] lock_hrtimer_base+0x19/0x35
[<c012fdc9>] hrtimer_try_to_cancel+0x3c/0x42
[<c012fdd9>] hrtimer_cancel+0xa/0x14
[<c027fb55>] do_nanosleep+0x43/0x6a
[<c012fee0>] hrtimer_nanosleep+0x3d/0xf0
[<c0161f4d>] sys_stat64+0xf/0x23
[<c012fcf6>] hrtimer_wakeup+0x0/0x18
[<c0124657>] do_gettimeofday+0x31/0xce
[<c0120f0d>] sys_time+0xa/0x2e
[<c0102c7b>] syscall_call+0x7/0xb
Code: 28 00 00 00 00 e9 d8 02 00 00 8b 43 54 8b 40 28 03 44 24 38 80
7c 24 06 00 8b 00 74 0a 85 c0 0f 85 b4 02 00 00 eb 0c 85 c0 74 08 <0f>
0b 6c 00 26 a4 83 de 8b 54 24 0c 8b 42 54 8b 40 28 03 44 24
EIP: [<de836fbb>] unionfs_lookup_backend+0x1da/0x735 [unionfs] SS:ESP

-- System Information:
Debian Release: 4.0
APT prefers stable
APT policy: (500, 'stable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-5-686
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)

Versions of packages linux-image-2.6.18-5-686 depends on:
ii coreutils 5.97-5.3 The GNU core utilities
ii debconf [debconf-2.0] 1.5.11 Debian configuration management sy
ii initramfs-tools [linux-initra 0.85h tools for generating an initramfs
ii module-init-tools 3.3-pre4-2 tools for managing Linux kernel mo

Versions of packages linux-image-2.6.18-5-686 recommends:
pn libc6-i686 <none> (no description available)

-- debconf information:
* linux-image-2.6.18-5-686/postinst/create-kimage-link-2.6.18-5-686: true
shared/kernel-image/really-run-bootloader: true
linux-image-2.6.18-5-686/postinst/old-system-map-link-2.6.18-5-686: true
linux-image-2.6.18-5-686/preinst/elilo-initrd-2.6.18-5-686: true
linux-image-2.6.18-5-686/prerm/would-invalidate-boot-loader-2.6.18-5-686: true
linux-image-2.6.18-5-686/postinst/depmod-error-initrd-2.6.18-5-686: false
linux-image-2.6.18-5-686/prerm/removing-running-kernel-2.6.18-5-686: true
linux-image-2.6.18-5-686/postinst/depmod-error-2.6.18-5-686: false
* linux-image-2.6.18-5-686/preinst/lilo-initrd-2.6.18-5-686: false
linux-image-2.6.18-5-686/preinst/overwriting-modules-2.6.18-5-686: true
linux-image-2.6.18-5-686/preinst/bootloader-initrd-2.6.18-5-686: true
linux-image-2.6.18-5-686/postinst/old-dir-initrd-link-2.6.18-5-686: true
linux-image-2.6.18-5-686/postinst/old-initrd-link-2.6.18-5-686: true

Elena of Valhalla

homepage: http://www.trueelena.org
email: elena.valhalla@gmail.com

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