Re: [PATCH v3 24/34] s390/cpumf: Unpoison STCCTM output buffer

[Heiko Carstens]

On Thu, Dec 14, 2023 at 12:24:44AM +0100, Ilya Leoshkevich wrote:
> stcctm() uses the "Q" constraint for dest, therefore KMSAN does not
> understand that it fills multiple doublewords pointed to by dest, not
> just one. This results in false positives.
> 
> Unpoison the whole dest manually with kmsan_unpoison_memory().
> 
> Reported-by: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
> Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
> ---
>  arch/s390/include/asm/cpu_mf.h | 6 ++++++
>  1 file changed, 6 insertions(+)

Acked-by: Heiko Carstens <hca@xxxxxxxxxxxxx>