linux-kernel - Re: [PATCH hotfix 6.12 v2 4/8] mm: resolve faulty mmap

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Message-ID: <CAHk-=wgE8410gu3EabjNEHhOYh1dyYwt23J62S4a9SYcwZUFhw@mail.gmail.com>
Date: Mon, 28 Oct 2024 11:19:16 -1000
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Vlastimil Babka <vbabka@...e.cz>
Cc: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, "Liam R. Howlett" <Liam.Howlett@...cle.com>, 
	Mark Brown <broonie@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, 
	Jann Horn <jannh@...gle.com>, linux-kernel@...r.kernel.org, linux-mm@...ck.org, 
	Peter Xu <peterx@...hat.com>, linux-arm-kernel@...ts.infradead.org, 
	Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
	Aishwarya TCV <Aishwarya.TCV@....com>
Subject: Re: [PATCH hotfix 6.12 v2 4/8] mm: resolve faulty mmap_region() error
 path behaviour

On Mon, 28 Oct 2024 at 11:00, Vlastimil Babka <vbabka@...e.cz> wrote:
>
> VM_MTE_ALLOWED is also set by arm64's arch_calc_vm_flag_bits():
>
>         if (system_supports_mte() && (flags & MAP_ANONYMOUS))
>                 return VM_MTE_ALLOWED;

Yeah, but that should just move into arch_validate_flags() too.
There's no reason why that's done in a separate place.

                     Linus