From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by smtp.subspace.kernel.org (Postfix) with ESMTPS id 42C1436F91C
	for <linux-kernel@vger.kernel.org>; Mon,  1 Jun 2026 11:16:54 +0000 (UTC)
Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18
ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;
	t=1780312615; cv=none; b=m0HGJxeVZ+y0M2XbQekoWwwCC8EBbLwlJH7Y5Q8ss94QnKRJcVfdSKHJ2AXJ41qbcMR40FYFwuAoVWhE8nKWt0E0ddfR1KgrFHHkt9UDxhQf56xh22AOgAEvveX++ZX+0myekz7CHjSPhGw0dAQEEriESZWUccLPkDI/VDjK80E=
ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org;
	s=arc-20240116; t=1780312615; c=relaxed/simple;
	bh=i8QgbPFyk7jHEQnOdw1TGHosDrVB73hJfXDbayiYKUM=;
	h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version:
	 Content-Type:Content-Disposition:In-Reply-To; b=nMbLA6VsvQOQUzQ/L+LzsMpy/5DMmHPKSPhCSCqDfF4HCg526JoABNr8gp+Er0pkmicabyRCLIVlGc1vgNsE35PTX/KINpeIuPsCyghXdHlRoswIAbTcnHVQ8Hkbs/Q3yNb9gDmjVOIKRzQkhurtBldQ3OQW6EShOz2kigStAL0=
ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Se3REjaw; arc=none smtp.client-ip=100.103.45.18
Authentication-Results: smtp.subspace.kernel.org;
	dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Se3REjaw"
Received: by smtp.kernel.org (Postfix) with ESMTPSA id A8F591F00893;
	Mon,  1 Jun 2026 11:16:51 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org;
	s=k20260515; t=1780312614;
	bh=OtwzM/l8y3UephO/mtNnc8CEWonyb3evNARkeGrVMCs=;
	h=Date:From:To:Cc:Subject:References:In-Reply-To;
	b=Se3REjaweR5q16QrSE2fTtEGtglkxumlmBsNUto7ugARGSpIeLcTdnFECTgZJGi5A
	 CScWKZseeSUrnqU2m8oToEDiJ1+ZULTViTTSBhnBgsUnPuuKosIeKUixojsliB8S9M
	 MMb0GEPOeJvW93sWkXrGegmBptY2n0LjOfqYyI7/xmARljawSAiPmemLLnY8aq6x2F
	 l25YhkU6fSYGA88eAmuWBWF4weNtf2j1c57dr1Ta548XhtCcx5mp5lUZeFXAopvXBq
	 moJjS4Ub02pEBKrJhkRWvlACBErJ8R8/Ekmq05DomL8VuPMrZDT9qNXSL5NNb1Ncbi
	 4GWMqppsEeBzA==
Date: Mon, 1 Jun 2026 12:16:49 +0100
From: Lorenzo Stoakes <ljs@kernel.org>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, 
	Christian Brauner <brauner@kernel.org>, David Hildenbrand <david@kernel.org>, 
	Jann Horn <jannh@google.com>, Kees Cook <kees@kernel.org>, Michal Hocko <mhocko@suse.com>, 
	linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] mm_access: simplify the security checks
Message-ID: <ah1pqCoH6guhnj8X@lucifer>
References: <ahrsfJE3NkKjShEX@redhat.com>
 <ahrvv-XGt8SiZUvW@redhat.com>
Precedence: bulk
X-Mailing-List: linux-kernel@vger.kernel.org
List-Id: <linux-kernel.vger.kernel.org>
List-Subscribe: <mailto:linux-kernel+subscribe@vger.kernel.org>
List-Unsubscribe: <mailto:linux-kernel+unsubscribe@vger.kernel.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <ahrvv-XGt8SiZUvW@redhat.com>

On Sat, May 30, 2026 at 04:10:07PM +0200, Oleg Nesterov wrote:
> On 05/30, Oleg Nesterov wrote:
> >
> > 2. With the change above may_access_mm() doesn't need the "mm" argument,
> >    so we do not need to call get_task_mm() beforehand, we can call it
> >    only if may_access_mm() suceeds.
> >
> > 2. With the change above, may_access_mm() doesn't need the "mm" argument,
> >    so we do not need to call get_task_mm() beforehand. We can call it
> >    only if may_access_mm() succeeds.
>
> OOPS. Somehow I wrote the same twice. Will fix the changelog and send V2
> in reply to this patch...

Sorry, pedantic side-note here but - in general in mm we prefer you don't send
new revision in-reply-to the prior one, as it makes them easier to miss! :)

>
> Oleg.
>

Cheers, Lorenzo