linux-kernel - Re: [PATCH v3 1/4] mm: establish mm/vma_exec.c for shared exec/mm VMA functionality

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Message-ID: <202504290953.70A8F99@keescook>
Date: Tue, 29 Apr 2025 09:53:56 -0700
From: Kees Cook <kees@...nel.org>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	"Liam R . Howlett" <Liam.Howlett@...cle.com>,
	Vlastimil Babka <vbabka@...e.cz>, Jann Horn <jannh@...gle.com>,
	Pedro Falcato <pfalcato@...e.de>,
	David Hildenbrand <david@...hat.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
	Suren Baghdasaryan <surenb@...gle.com>, linux-mm@...ck.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/4] mm: establish mm/vma_exec.c for shared exec/mm
 VMA functionality

On Mon, Apr 28, 2025 at 04:28:14PM +0100, Lorenzo Stoakes wrote:
> There is functionality that overlaps the exec and memory mapping
> subsystems. While it properly belongs in mm, it is important that exec
> maintainers maintain oversight of this functionality correctly.
> 
> We can establish both goals by adding a new mm/vma_exec.c file which
> contains these 'glue' functions, and have fs/exec.c import them.
> 
> As a part of this change, to ensure that proper oversight is achieved, add
> the file to both the MEMORY MAPPING and EXEC & BINFMT API, ELF sections.
> 
> scripts/get_maintainer.pl can correctly handle files in multiple entries
> and this neatly handles the cross-over.
> 
> Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>

(I realize I didn't actually send tags...)

Reviewed-by: Kees Cook <kees@...nel.org>

-- 
Kees Cook