From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 C70996AB8; Wed, 24 Jul 2024 01:36:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721785008; cv=none; b=HIIqGenPBb4vdXFS+buO5Co4KkCoScaIHKoIjTtJzobZDbDvTVkDH7io1I2NyYrYW4Pu+UKBb/v5oq+qypLeN4wbAtCp/VYvktTn5i0KkMPwY1Dznk/hT05faJfFka8ecssvChv3tKu2AFRLkN0Y3mlt96AZ8A8sIL7jMmMJUPM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721785008; c=relaxed/simple; bh=DSoHkrticSUz3ExlaqEpt/d/4CHtbkEtdwE/BGTS6J0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=lY87Ed8OJLiO8EtCZIdxIfEQwcHY6HpOAbAF2d50V9Z5RoqCLcGJClSNTdUMwZcMrcf6COj+If6Za3l0FiBlkt/Upvthr5rdzzujOfDfIXagz+RU8XCXHyHmLo7TfpoF/jGPngPwqtjnqQ9Q0AZ/y5PgBonn0N9cv7tywCHrO/s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=boIcptl7; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="boIcptl7" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=DSoHkrticSUz3ExlaqEpt/d/4CHtbkEtdwE/BGTS6J0=; b=boIcptl7aenWh5FcQpx98Kn4H9 ezYw2FaUz+kLWIOdii+AkfQVUCjtcXkmGcVOnl8trncEV1+jZ99OsoJAVjjBYDmwzExbnRYl4uNRe s5zHiPs7OyDYDSGPcZW6xMN9J9Qu8O2RgliHN8NJxap470usxy/ePBuRcsBUf2aLSnxuaT6r7eFmE rh5o1bkWtDQN9S8imx2TNAc8q5eTJ5xFjCtq3ATUyuSwaP3FmZqF1yCvMJjM9cwOomtF9CGuxtKhL YFmRNxm6Jzi7A3E7knLTsf2/GVH6zTsQE3dv5Pbp0RJsVNy4nBOjvvWndj4Eze2J+G1QJo/M/vHud wCwxOZYA==; Received: from hch by bombadil.infradead.org with local (Exim 4.97.1 #2 (Red Hat Linux)) id 1sWQvq-0000000E1iF-2eD9; Wed, 24 Jul 2024 01:36:42 +0000 Date: Tue, 23 Jul 2024 18:36:42 -0700 From: Christoph Hellwig To: Matthew Wilcox Cc: Andrew Morton , Mary Strodl , Christian Gmeiner , Christoph Hellwig , Mary Strodl , linux-kernel@vger.kernel.org, urezki@gmail.com, linux-mm@kvack.org, lee@kernel.org, andi.shyti@kernel.org, linux-i2c@vger.kernel.org, s.hauer@pengutronix.de Subject: Re: [PATCH 1/3] mm: vmalloc: export __vmalloc_node_range Message-ID: References: <20240718143103.82e33c556b2d1b6145ae43e0@linux-foundation.org> <20240718143924.43e22f68cf639b064a83f118@linux-foundation.org> <20240723170043.4f17a3d0b6280e57561ba1f5@linux-foundation.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Wed, Jul 24, 2024 at 01:16:02AM +0100, Matthew Wilcox wrote: > That we're running arbitrary x86 code (provided by the manufacturer) > inside the kernel where it can undermine every security guarantee we > provide? .. and by exporting the interface allow arbitrary other code including exploit code to allocate writable and executable memory?