Re: [PATCH] lib/string: Fix UBSAN misaligned access in sized_strscpy

[Andy Shevchenko]

On Tue, Feb 24, 2026 at 05:04:27PM +0000, Fuad Tabba wrote:
> sized_strscpy() performs word-at-a-time writes to the destination
> buffer. If the destination buffer is not aligned to unsigned long,
> direct assignment causes UBSAN misaligned-access errors.
> 
> Use put_unaligned() to safely write the words to the destination.

Have you measured the performance impact?
Have you read the comment near to

        if (IS_ENABLED(CONFIG_KMSAN))

?

-- 
With Best Regards,
Andy Shevchenko