Re: [PATCH 1/3] x86: mm: disable KMSAN instrumentation for physaddr.c
From: Kirill A . Shutemov
Date: Fri Jun 21 2024 - 10:57:52 EST
On Fri, Jun 21, 2024 at 11:48:59AM +0200, Alexander Potapenko wrote:
> Enabling CONFIG_DEBUG_VIRTUAL=y together with KMSAN led to infinite
> recursion, because kmsan_get_metadata() ended up calling instrumented
> __pfn_valid() from arch/x86/mm/physaddr.c.
>
> Prevent it by disabling instrumentation of the whole file.
>
> Reported-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
> Closes: https://github.com/google/kmsan/issues/95
> Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
--
Kiryl Shutsemau / Kirill A. Shutemov