[Pkg-xen-devel] Bug#934786: xen-system-amd64: xen host crashes when calling "npm run build" in a vm (reproducible)

[Hans van Kranenburg]

Hi Mario,

On 8/14/19 11:00 PM, mario wrote:
> Package: xen-system-amd64
> Version: 4.8.5+shim4.10.2+xsa282-1+deb9u11
> Severity: important
> 
> hello everyone,
> 
> we have a vm with kernel 4.9.0-5-amd64 running dabian oldstable
> if we run an "npm run build" on one of the virtual machines, the whole xen-host system will restart (reset)
> there is no message, neither in the kernel nor in the syslog.
> 
> if we update the kernel of the virtual machine to 4.9.0-9-amd64, the problem is no longer there and the build runs without errors.
> 
> the kernel of the hosts system doesn't matter, even the latest 4.9.0-9-amd64 doesn't help.
> 
> we have a second server (with different hardware) also here i can crash the complete xen-server from the vm with all vms that are running.
> 
> the whole thing works reproducible by starting "npm run build" on this special vm
> 
> any idea how we can narrow that down and provide more information???

Interesting. Do you know if it's Xen crashing, or the dom0 Linux kernel?

The Xen wiki has some hints about debugging:
https://wiki.xen.org/wiki/Debugging_Xen

The first thing I would recommend is getting the server serial port
working properly so that you can see Xen messages there.

This bug was reported against Xen 4.8 (which is out of support and out
of security support now). I would highly recommend to first upgrade to
Xen 4.11 in current Debian stable and see if you can still reproduce
this problem.

If you no longer have this problem, or found a solution, please let know.

If there's no activity, I will close this issue in about a month.

Thanks,
Hans