Linux

Kernel panic with 2.6.32-26 security upgrade

Bug #687392 reported by Raphaël Pinson on 2010-12-08

This bug affects 6 people

Affects		Status	Importance	Assigned to	Milestone
	Linux	Confirmed	Undecided	Unassigned
	linux (Ubuntu)	Fix Released	Critical	Kai Nentwig

Bug Description

Upgrading to the latest kernel on Lucid (2.6.32-26.48) yields on kernel panic upon reboot with:

VFS: Unable to mount root fs on unknown-block(0,0)

This bug has been reported by other users on the forums, see http://ubuntuforums.org/showthread.php?t=1625986 for example.
This is a major issue since this version of the kernel fixes a major security vulnerability.

Revision history for this message

Raphaël Pinson (raphink) wrote on 2010-12-08:

Dmesg (from the working kernel, i.e. 2.6.32-22) Edit (48.2 KiB, text/plain)

Changed in linux (Ubuntu):
importance:	Undecided → Critical

Revision history for this message

Raphaël Pinson (raphink) wrote on 2010-12-08:

lspci -vvnn output Edit (29.3 KiB, text/plain)

Revision history for this message

Raphaël Pinson (raphink) wrote on 2010-12-08:

uname -a output Edit (127 bytes, text/plain)

Revision history for this message

Raphaël Pinson (raphink) wrote on 2010-12-08:

/proc/version_signature contents Edit (45 bytes, text/plain)

Revision history for this message

Tim Gardner (timg-tpi) wrote on 2010-12-14:

Can you narrow down when this regression started happening? There are a range of kernels still in the archive at http://archive.ubuntu.com/ubuntu/pool/main/l/linux/, e.g.,

http://archive.ubuntu.com/ubuntu/pool/main/l/linux/linux-image-2.6.32-23-server_2.6.32-23.37_amd64.deb
http://archive.ubuntu.com/ubuntu/pool/main/l/linux/linux-image-2.6.32-24-server_2.6.32-24.42_amd64.deb
http://archive.ubuntu.com/ubuntu/pool/main/l/linux/linux-image-2.6.32-25-server_2.6.32-25.45_amd64.deb
http://archive.ubuntu.com/ubuntu/pool/main/l/linux/linux-image-2.6.32-27-server_2.6.32-27.49_amd64.deb

Revision history for this message

Alexander Gordon Jahans (farsh-nuke) wrote on 2010-12-16:

When I upgraded to Maverick 10.10 something went wrong with the installation and the grub failed to boot, I think that's the same problem

Revision history for this message

Aaron Brady (bradya) wrote on 2011-01-05:

Hi,

This may be a grub1 problem; we were running this kernel version under grub1 (because that's what vmbuilder does) and KVM and had two machines fail to boot. Editing the "root" kernel parameter from the UUID to /dev/sda1 and booting allowed us to boot correctly. Upgrading to the latest kernel seemed to fix this regression.

Revision history for this message

Raphaël Pinson (raphink) wrote on 2011-01-05:

In our case, this is not a grub1 issue, we use grub2.

Revision history for this message

Vladimir Scherbaev (zemik) wrote on 2011-01-05:

I have seems kernel panic on 2.6.32-26 и 2.6.32-27:
Kernel Panic - not syncing: init not found. try passing init= option to the kernel

But 2.6.32-25 work fine.
If need I can attach any information.

Revision history for this message

Tim Gardner (timg-tpi) wrote on 2011-01-05:

#10

Raphaël Pinson - Can you tell me what was the last known good kernel that works for you?

Revision history for this message

Jeremy Foshee (jeremyfoshee) wrote on 2011-01-11:

#11

setting incomplete per TGardner's last request for information.

~JFo

Changed in linux (Ubuntu):
status:	New → Incomplete

Simon Bull (simon-d-bull) on 2011-01-16

Changed in linux:
status:	New → Confirmed

Revision history for this message

Simon Bull (simon-d-bull) wrote on 2011-01-16:

#12

Hi there - i can confirm this bug.

On two occasions I have had issues with the kernel and grub after an update. On both occasions it failed to mount root fs and also had many tty errors. For the record, the kernels in question for me were 2.6.32-26 as well as the 2.6.35-22 kernel.

Simon

Revision history for this message

Vladimir Scherbaev (zemik) wrote on 2011-04-02:

#13

All initrd images broken after another update. If I load with initrd for my kernel from other Ubuntu Server -- it's work.

After "update-initramfs -k all" -- all initrd's are broken.

Revision history for this message

Bob Harvey (bobharvey) wrote on 2011-05-07:

#14

PING - Is anything happening?

JAY (richalakhlani) on 2011-07-20

Changed in linux (Ubuntu):
status:	Incomplete → Confirmed
status:	Confirmed → Incomplete

Kai Nentwig (kai-nentwig) on 2011-08-02

Changed in linux (Ubuntu):
status:	Incomplete → New
status:	New → Confirmed
assignee:	nobody → Kai Nentwig (kai-nentwig)

Hamdy Arifin (onyxdua) on 2011-09-20

Changed in linux (Ubuntu):
status:	Confirmed → Fix Released

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