Re: [PATCH v4] mempool: Do not use ksize() for poisoning

[Vlastimil Babka]

On 11/1/22 18:15, Kees Cook wrote:
> On Mon, Oct 31, 2022 at 04:00:25PM +0100, Vlastimil Babka wrote:
> >  From a4a5a40852723dfadb2429bee1d5e1f9d3b75f39 Mon Sep 17 00:00:00 2001
> > From: Vlastimil Babka <vbabka@xxxxxxx>
> > Date: Mon, 31 Oct 2022 15:55:47 +0100
> > Subject: [PATCH] mempool: Do not use ksize() for poisoning-fix
> >
> > For slab mempools (not kmalloc), pool_data is not object size, but a
> > kmem_cache pointer; we need to extract the size via kmem_cache_size().
> >
> > Reported-by: Anders Roxell <anders.roxell@xxxxxxxxxx>
> > Link: https://lore.kernel.org/all/20221031105514.GB69385@mutt/
> > Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
> > Link: https://lore.kernel.org/oe-lkp/202210312110.1fe5d224-oliver.sang@xxxxxxxxx
> > Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx>
>
> Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
>
> Thanks again for fixing this. I don't see it in -next yet? Should I
> resend this directly, or how would be best to land it?

I think Andrew will add it from here, but maybe is waiting for Anders 
acknowledging that it fixes the bug for him?

> -Kees