Re: [PATCH v6 2/2] slub: Introduce CONFIG_SLUB_RCU_DEBUG

[Andrey Konovalov]

On Fri, Aug 2, 2024 at 11:35 PM Jann Horn <jannh@xxxxxxxxxx> wrote:
>
> > Ah, notice another thing: this test might fail of someone enables
> > CONFIG_SLUB_RCU_DEBUG with HW_TAGS, right? I think we need another
> > check here.
>
> Why? I realize that HW_TAGS can't detect UAF in a TYPESAFE_BY_RCU slab
> after an object has been reused, but here we do no other allocations,
> so the object should still be free. And the kmalloc_uaf test also
> doesn't check for HW_TAGS.

Ah, right, all should be good, I got myself confused, sorry.