Re: Linux 6.1.52 regression: Intel QAT kernel panic (memory corruption)

[Giovanni Cabiddu]

On Thu, Sep 14, 2023 at 10:27:22PM -0700, Kyle Sanderson wrote:
> Hello Intel QAT Maintainers,
> 
> It looks like QAT has regressed again. The present symptom is just
> straight up memory corruption. I was running Canonical 6.1.0-1017-oem
> and it doesn't happen, with 6.1.0-1020-oem and 6.1.0-1021-oem it does.
> I don't know what these map to upstream, however with NixOS installed
> the same corruption failure occurs on 6.1.52. The stack traces give
> illegal instructions and all kinds of badness across all modules when
> the device is simply present on the system, resulting in a hung
> system, or a multitude of processes crashing and the system failing to
> start. Disabling the device in the system BIOS results in a working
> system, and no extreme corruption. kmem_cache_alloc_node is the common
> fixture in the traces (I don't have a serial line), but I suspect
> that's not where the problem is. The corruption this time happens
> without block crypto being involved, and simply booting the installer
> from a USB stick.
This is probably be related to [1].
Versions from 6.1.39 to 6.1.52 are affected. Fixed in v6.1.53.

[1] https://www.spinics.net/lists/stable/msg678947.html

Regards,

-- 
Giovanni