linux-kernel - Re: [PATCH RFC 11/35] mm: sanity-check maximum folio size in folio_set

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Message-ID: <5566D681-ED92-41A8-AF46-216AC8F62174@nvidia.com>
Date: Thu, 21 Aug 2025 16:36:49 -0400
From: Zi Yan <ziy@...dia.com>
To: David Hildenbrand <david@...hat.com>
Cc: linux-kernel@...r.kernel.org, Alexander Potapenko <glider@...gle.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Brendan Jackman <jackmanb@...gle.com>, Christoph Lameter <cl@...two.org>,
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 dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
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 Jason Gunthorpe <jgg@...dia.com>, Jens Axboe <axboe@...nel.dk>,
 Johannes Weiner <hannes@...xchg.org>, John Hubbard <jhubbard@...dia.com>,
 kasan-dev@...glegroups.com, kvm@...r.kernel.org,
 "Liam R. Howlett" <Liam.Howlett@...cle.com>,
 Linus Torvalds <torvalds@...ux-foundation.org>, linux-arm-kernel@...s.com,
 linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org,
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 Vlastimil Babka <vbabka@...e.cz>, wireguard@...ts.zx2c4.com, x86@...nel.org
Subject: Re: [PATCH RFC 11/35] mm: sanity-check maximum folio size in
 folio_set_order()

On 21 Aug 2025, at 16:06, David Hildenbrand wrote:

> Let's sanity-check in folio_set_order() whether we would be trying to
> create a folio with an order that would make it exceed MAX_FOLIO_ORDER.
>
> This will enable the check whenever a folio/compound page is initialized
> through prepare_compound_head() / prepare_compound_page().
>
> Signed-off-by: David Hildenbrand <david@...hat.com>
> ---
>  mm/internal.h | 1 +
>  1 file changed, 1 insertion(+)
>

Reviewed-by: Zi Yan <ziy@...dia.com>

Best Regards,
Yan, Zi