Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755780AbeAJQyk (ORCPT + 1 other); Wed, 10 Jan 2018 11:54:40 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:36879 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752043AbeAJQyh (ORCPT ); Wed, 10 Jan 2018 11:54:37 -0500 Date: Wed, 10 Jan 2018 08:54:33 -0800 From: Christoph Hellwig To: Paolo Bonzini Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, Jens Axboe , hch@infradead.org Subject: Re: [PATCH v2] block: silently forbid sending any ioctl to a partition Message-ID: <20180110165433.GA3084@infradead.org> References: <20180110155452.26563-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180110155452.26563-1-pbonzini@redhat.com> User-Agent: Mutt/1.9.1 (2017-09-22) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: On Wed, Jan 10, 2018 at 04:54:52PM +0100, Paolo Bonzini wrote: > After the first few months, the message has not led to many bug reports. > It's been almost five years now, and in practice the main source of > it seems to be MTIOCGET that someone is using to detect tape devices. > While we could whitelist it just like CDROM_GET_CAPABILITY, this patch > just removes the message altogether. > > The patch also removes the "safe but not very useful" ioctl whitelist, > as suggested by Christoph. I doubt anything is using most of those > ioctls _in general_, let alone on a partition. > > Signed-off-by: Paolo Bonzini Nice, thanks! Reviewed-by: Christoph Hellwig