Re: [Xen-devel] [BUG] gdbsx crashes Xen

[Carl Patenaude Poulin <carl.patenaudepoulin@xxxxxxxxxxxxxx>]

Hi all,

Sorry for the delay. I've managed to get some serial console output.

https://gist.github.com/lilred/50285e1f33ab1c881ea0

I am not on Broadwell hardware. I'm using a PowerEdge R300 machine,

with a Xeon x5460 CPU.

Best

On Thu, Feb 11, 2016 at 11:35 AM, Andrew Cooper <andrew.cooper3@xxxxxxxxxx> wrote:

On 11/02/16 16:25, Carl Patenaude Poulin wrote:

Hey folks,

With gdbsx running, Running `gdb -ex "target remote localhost:9999"

crashes Xen and reboots the server.

Example session: http://i.imgur.com/UXh3RCy.png

Minimal reproduction: https://github.com/lilred/xen-crash-repro

Top line of `xl dmesg`:

    Xen version 4.6.0 (root@xxxxxxxxxxxx) (gcc (Ubuntu 5.2.1-22ubuntu2) 5.2.1 20151010) debug=y Mon Dec 28 21:34:16 EST 2015

Output of `lsb_release -a`:

    No LSB modules are available.

    Distributor ID: Ubuntu

    Description:    Ubuntu 15.10

    Release:        15.10

    Codename:       wily

I can provide more information if you tell me what to look for. Also,

I would LOVE a work-around.

At the very minimum, you need to set up a serial console and capture the panic log.

Are you on Broadwell hardware by any chance?  I fixed a SMAP violation in that hypercall a little while ago.

~Andrew

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