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SubjectRe: [PATCH v6 2/2] kasan: Add memzero int for unaligned size at DEBUG
On Mon, Jul 5, 2021 at 1:18 PM Marco Elver <elver@google.com> wrote:
>
> On Mon, 5 Jul 2021 at 13:12, Andrey Konovalov <andreyknvl@gmail.com> wrote:
> [...]
> > > + /*
> > > + * Explicitly initialize the memory with the precise object size to
> > > + * avoid overwriting the SLAB redzone. This disables initialization in
> > > + * the arch code and may thus lead to performance penalty. The penalty
> > > + * is accepted since SLAB redzones aren't enabled in production builds.
> > > + */
> > > + if (__slub_debug_enabled() &&
> >
> > What happened to slub_debug_enabled_unlikely()? Was it renamed? Why? I
> > didn't receive patch #1 of v6 (nor of v5).
>
> Somebody had the same idea with the helper:
> https://lkml.kernel.org/r/YOKsC75kJfCZwySD@elver.google.com
> and Matthew didn't like the _unlikely() prefix.
>
> Which meant we should just move the existing helper introduced in the
> merge window.
>
> Patch 1/2: https://lkml.kernel.org/r/20210705103229.8505-2-yee.lee@mediatek.com

Got it. Thank you, Marco!

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