linux-kernel - Re: [PATCH 1/4] mm: kvrealloc: disable KASAN when switching to vmalloc

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Message-ID: <Zqltn2PH1oZ7cEqJ@pollux.localdomain>
Date: Wed, 31 Jul 2024 00:47:59 +0200
From: Danilo Krummrich <dakr@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: urezki@...il.com, hch@...radead.org, vbabka@...e.cz, mhocko@...e.com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 1/4] mm: kvrealloc: disable KASAN when switching to
 vmalloc

On Tue, Jul 30, 2024 at 02:15:08PM -0700, Andrew Morton wrote:
> On Tue, 30 Jul 2024 20:49:41 +0200 Danilo Krummrich <dakr@...nel.org> wrote:
> 
> > Disable KASAN accessibility checks when switching from a kmalloc buffer
> > to a vmalloc buffer.
> 
> This text tells us "what", which was utterly evident from a cursory
> read of the code.
> 
> Please tell us the "why".  Completely.

As mentioned in the other reply. Since this is a fixup series for stuff that's
in mm-unstable already, and hence gets squashed in later on, I treated this more
like the list of changes one would also append when sending the next version of
a series.

If you expect such fixup commits to have the same detail than regular ones, I'll
surely add those details and resend. Please let me know.

> 
> > Fixes: 923a26b4c679 ("mm: kvmalloc: align kvrealloc() with krealloc()")
> 
> For those who are following along, this patch in mm-unstable so this
> patch will be squished into the above.
>