Re: [PATCH v2 18/33] lib/string: Add KMSAN support to strlcpy() and strlcat()

[Ilya Leoshkevich]

On Fri, 2023-12-08 at 17:50 +0100, Alexander Potapenko wrote:
> On Tue, Nov 21, 2023 at 11:02 PM Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
> wrote:
> > 
> > Currently KMSAN does not fully propagate metadata in strlcpy() and
> > strlcat(), because they are built with -ffreestanding and call
> > memcpy(). In this combination memcpy() calls are not instrumented.
> 
> Is this something specific to s390?

Nice catch - I can't reproduce this behavior anymore. Even if I go
back to the clang version that first introduced KMSAN on s390x, the
memset() instrumentation with -ffreestanding is still there. I should
have written down more detailed notes after investigating this, but
here we are. I will drop this patch as well as 10/33.

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