We think that this seems to be an interplay between the kernel bug,
ohai, and Ruby 1.9.3. I was unable to reproduce the crash using the
opscode omnibus installer (http://www.opscode.com/blog/2012/06/29
/omnibus-chef-packaging/) which uses a bundled ruby 1.9.2, so you could
potentially try that as a
And another one from the debug kernel on EC2, with a slightly different
call stack:
[ 4389.480352] [ cut here ]
[ 4389.480884] kernel BUG at
/home/smb/precise-amd64/ubuntu-2.6/kernel/sched_fair.c:1239!
[ 4389.480894] invalid opcode: [#1] SMP
[ 4389.480902] CPU 0
[ 4
And we've just reproduced on EC2 with the debug kernel:
[248587.286290] [ cut here ]
[248587.286765] kernel BUG at
/home/smb/precise-amd64/ubuntu-2.6/kernel/sched_fair.c:1239!
[248587.286775] invalid opcode: [#1] SMP
[248587.286783] CPU 0
[248587.286786] Modules lin
We've got small EC2 instances (single processor) that haven't exhibited
this behaviour, but we get it with large EC2 instances (2 CPUs); the
VirtualBox machine I just reproduced it with was specifically set to 2
CPUS.
It seems to me that this bug might only occur on multi-cpu boxes?
** Summary ch
I've just reproduced this crash using the stock 3.2.0-24-39 kernel on
VirtualBox on OS X (Lion).
I created a 2-CPU VM using the latest VirtualBox (4.1.16 r78094), for
Ubuntu 64-bit, default 8GB disk. The steps I followed were:
* Install 64-bit 12.04 Server LTS, minimal install from ISO downloaded
We've also seen this on the -24.38 and -24.39 kernels now:
[56843.390534] BUG: unable to handle kernel NULL pointer dereference at
0010
[56843.390551] IP: [] rb_next+0x1/0x50
[56843.390566] PGD 1d20a7067 PUD 1d29a2067 PMD 0
[56843.390575] Oops: [#1] SMP
[56843.390583] CPU 1
[5
Triggered this again by running ohai in a continuous loop, took about 24
hours to occur:
[18438803.627371] BUG: unable to handle kernel NULL pointer dereference at
0010
[18438803.627388] IP: [] rb_next+0x1/0x50
[18438803.627402] PGD 1d0efa067 PUD 1d232d067 PMD 0
[18438803.627411] Oo
BTW Xen version from dmesg is:
Xen version: 3.4.3-2.6.18 (preserve-AD)
This is on EC2 so we have no control over this.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/999755
Title:
Kernel crash on
I've reproduced this by running the OHAI command from the OpsCode Chef
ohai gem (0.6.12) in a loop, although it took nearly 2 days before it
triggered. Basically I ran `gem install ohai; while true; do ohai; done`
in a screen session.
The stack trace is:
[18362917.357055] BUG: unable to handle k
