Red Hat Bugzilla – Bug 441616
Kernel panic on 126.96.36.199-50.fc8 and 188.8.131.52-60.fc8 on VMWare machine.
Last modified: 2009-01-09 01:21:23 EST
Description of problem:
Kernel panic with kernels 184.108.40.206-50.fc8 and 220.127.116.11-60.fc8 on a VMWare
machine with SCSI virtual drives.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Upgrade past 18.104.22.168-34
Kernel panic about "No init found" and to try adding it to the command line.
This is right after it write-protects certain kernel data.
It looks like the SCSI driver isn't showing up - the working kernel in verbose
mode tells me that it initialized the BT-958. It crashes right before that
should happen - the "good" boot says "Write protecting the kernel read-only
data" and then loads up the ohci_hcd driver followed by the SCSI subsystem
Is the initrd's init script loading the BT driver?
See http://fedoraproject.org/wiki/KernelCommonProblems for how to examine the
I cannot tell offhand, but I am seeing a big problem!
I checked the initrd files for:
It looks like after 34, the "init" file has been corrupted!? They both have a
bunch of nulls at the beginning instead of "#!/bin/nash" and all the other setups.
rpm -qa | grep kernel | xargs rpm -V says nothing
rpm -qa | grep kernel | xargs rpm -v -V | grep initrd also has nothing
Very odd. Any ideas???
You could try booting the working kernel and rebuilding the initrds for the
newer ones. (but make backups first)
I tried that, no luck. If I try to use the older initrd on the newer kernel, the
keys don't match so it won't load kernel modules. I tried to re-build the initrd
by copying the /etc/init script from the working copy. I got the same error
about it not finding init (and again, it didn't load the BusLogic modules).
However, this doesn't explain the NULLs at the beginning of the "init" in two
initrd files that rpm thinks is fine.
(In reply to comment #4)
> I tried that, no luck. If I try to use the older initrd on the newer kernel, the
> keys don't match so it won't load kernel modules.
You need to tell mkinitrd which kernel you are building the initrd for.
I was able to get mkinitrd to work. However, I would like to understand why (a)
rpm didn't complain about the file, (b) why when I rebuilt it by hand it didn't
work, and (c) what happened to make me need to run it manually for every new
rpm can't verify the initrd file because it gets custom-built for each installation.
Newest update (22.214.171.124-85.fc8) still fails. Again, a manual "mkinitrd" run
solved the issue, but to do that I need a previous kernel that runs and is still
I think I have found the issue. It was with Zerotools (1) which zeros out files when they are unlinked, a very useful feature when working with virtual machines. On a whim yesterday, I reverted back to the previous kernel and then erased the RPMs for the newest. I removed the Zerotools yum wrapper and did "yum upgrade". The new kernel booted fine.
It looks like either yum or mkinitrd is doing something odd with the disk I/O, possibly unlinking the file and then assuming it is still valid (2). If that's the case, this could be a problem on other file systems where you cannot assume data is retained after unlink. However, I looked through the mkinitrd script and the last 15-20 lines seem to be where that action is and it looks fine by me. So I'm leaving it up to the powers-that-be to decide if this really is a mkinitrd bug or not.
(2) http://www.koltsoff.com/pub/zerotools/#toc17 "Problem Cases"
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