[Bug 16711] New: Oops with 2.6.36-rc1

[Bug 16711] New: Oops with 2.6.36-rc1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=16711

           Summary: Oops with 2.6.36-rc1
           Product: File System
           Version: 2.5
    Kernel Version: 2.6.36-rc1
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: ext4
        AssignedTo: fs_ext4@kernel-bugs.osdl.org
        ReportedBy: devnull@plzk.org
                CC: akpm@linux-foundation.org, eparis@redhat.com
        Regression: Yes


The ubuntu/debian build of 2.6.36-rc1 from [1] doesn't boot on my macbook
v.2.1. It's most likely not an EXT4 bug but I have no idea where to put it and
cc people that probably know better. I am linking to a crappy cellphone shot of
the oops, please see [2].

Unfortunately, due to the kernel-package in ubuntu being broken once again, I
can't build myself, hence no bisecting. All I can say is that 2.6.35-rc2 from
the same ppa works.

Let me know if additional info is needed.

Regards,
Tobias

[1] http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.36-rc1-maverick/
[2] http://img841.imageshack.us/img841/6654/imag0030l.jpg

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[Bug 16711] Oops with 2.6.36-rc1

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Eric Sandeen <sandeen@redhat.com> changed:

           What    |Removed                     |Added
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                 CC|                            |sandeen@redhat.com




--- Comment #1 from Eric Sandeen <sandeen@redhat.com>  2010-08-21 16:28:12 ---
Not an ext4 or even filesystem bug; looks like it was going down an apparmor
path (aa_alloc_task_context) when it oopsed.  Unfortunately I don't know how to
move a bug off the filesystem component.

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[Bug 16711] Oops with 2.6.36-rc1

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https://bugzilla.kernel.org/show_bug.cgi?id=16711


Tobias <devnull@plzk.org> changed:

           What    |Removed                     |Added
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                 CC|                            |john.johansen@canonical.com




--- Comment #2 from Tobias <devnull@plzk.org>  2010-08-23 10:18:37 ---
Apologies, I obviously can't read a trace. I guess I could move this to another
category, but have no idea where to.

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[Bug 16711] Oops with 2.6.36-rc1

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https://bugzilla.kernel.org/show_bug.cgi?id=16711





--- Comment #3 from John Johansen <john.johansen@canonical.com>  2010-08-24 23:59:41 ---
Tobias,

can you try booting with the kernel parameter of apparmor=0

If apparmor is causing the problem then, this wil disable apparmor and cause
the kernel to fall back to just DAC.

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[Bug 16711] Oops with 2.6.36-rc1

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https://bugzilla.kernel.org/show_bug.cgi?id=16711





--- Comment #4 from Tobias <devnull@plzk.org>  2010-08-25 07:52:43 ---
Both rc1 and rc2 seem to oops regardless of apparmor being enabled or not.

Please see [1] for a boot attempt of rc1 with apparmor disabled and [2] for a
failed rc2 boot. I am actually not sure if apparmor was disabled on this rc2
boot, I tried several times and can only say that this is not the only trace
that scrolls by, just the last one that stays on screen.

Sorry for the horrible pics btw.

[1]http://img819.imageshack.us/img819/221/imag0033qx.jpg
[2]http://img842.imageshack.us/img842/4300/imag0037ij.jpg

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[Bug 16711] Oops with 2.6.36-rc1

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https://bugzilla.kernel.org/show_bug.cgi?id=16711





--- Comment #5 from John Johansen <john.johansen@canonical.com>  2010-08-25 16:14:50 ---
Tobias,

thanks for testing.  It looks like apparmor is disabled in both.  Can you
provide some more detail about your setup?

--- Comment #6 from John Johansen <john.johansen@canonical.com>  2010-08-26 09:35:12 ---
Tobias,

Can you clarify how the kernel packaging in ubuntu is broken, so we can look
into fixing it.

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[Bug 16711] Oops with 2.6.36-rc1

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https://bugzilla.kernel.org/show_bug.cgi?id=16711





--- Comment #7 from Tobias <devnull@plzk.org>  2010-08-26 10:27:44 ---
Created an attachment (id=28011)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=28011)
lspci

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[Bug 16711] Oops with 2.6.36-rc1

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--- Comment #8 from Tobias <devnull@plzk.org>  2010-08-26 10:29:21 ---
John,

wrt #5: This is a Macbook 2.1, I replaced RAM and HDD a while back. lscpi
output attached. I have an OSX install on it that it never used, and Ubuntu
10.04. Ubuntu install consists of an unencrypted /boot partition and an
encrypted partition where LVM provides / and /home. 

fdisk -l shows:

/dev/sda1               1          26      204819+  ee  GPT
/dev/sda2   *          26        5248    41943040   af  HFS / HFS+
/dev/sda3            5248        5308      487424   83  Linux
/dev/sda4            5308       60802   445750272   ef  EFI (FAT-12/16/32)

mount:

/dev/mapper/vg-root on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev type devtmpfs (rw,mode=0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode=0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
none on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
/dev/mapper/vg-home on /home type ext4 (rw)
/dev/sda3 on /boot type ext3 (rw)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc
(rw,noexec,nosuid,nodev)
gvfs-fuse-daemon on /home/tobias/.gvfs type fuse.gvfs-fuse-daemon
(rw,nosuid,nodev,user=tobias)

That said this is a stock setup.

wrt #6: I think I am running into the same issue as described in [1]. People
are saying it is fixed in maverick, so I am hoping for an upgrade or backport
to lucid.
What puzzles me is that the exact issue (trying to build a -git kernel) was
reported to lkml from a maverick user [2], and the thread suggests that there
are kernel patches available to fix this. Now I am unsure where if
kernel-package or source itself are broken.

Please let me know if there are things I can do to be of help (things that
break my setup are no option unfortunately).

[1] https://bugs.launchpad.net/ubuntu/+source/kernel-package/+bug/58307
[2] http://marc.info/?t=128247993200002&r=1&w=2

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[Bug 16711] Oops with 2.6.36-rc1

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https://bugzilla.kernel.org/show_bug.cgi?id=16711





--- Comment #9 from Tobias <devnull@plzk.org>  2010-09-01 08:42:21 ---
FWIW, -rc3 does not oops during boot, so I guess this has been fixed. I am
still getting ioctl errors related to dm, and screen resolution min gnome is
wrong, but those are different issues as far as I understand.

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[Bug 16711] Oops with 2.6.36-rc1

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Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
                 CC|                            |alan@lxorguk.ukuu.org.uk
         Resolution|                            |OBSOLETE




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