Re: [PATCH 0/2] um: improve UML page fault handling

[Petr Tesařík]

Happy New Year, everyone!

I can fully understand that you all have had other priorities around
the year end; it was no different with me. ;-)

However, may I kindly ask for some feedback on my proposed fixes?

Petr T

On Fri, 15 Dec 2023 13:14:29 +0100
Petr Tesarik <petrtesarik@xxxxxxxxxxxxxxx> wrote:

> From: Petr Tesarik <petr.tesarik1@xxxxxxxxxxxxxxxxxxx>
> 
> Improve UML handling of segmentation faults in kernel mode. Although
> such page faults are generally caused by a kernel bug, it is annoying
> if they cause an infinite loop, or panic the kernel. More importantly,
> a robust implementation allows to write KUnit tests for various guard
> pages, preventing potential kernel self-protection regressions.
> 
> Petr Tesarik (2):
>   um: do not panic on kernel mode faults
>   um: oops on accessing an non-present page in the vmalloc area
> 
>  arch/um/kernel/trap.c | 19 ++++++++++++++-----
>  1 file changed, 14 insertions(+), 5 deletions(-)
>