Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754656AbbKQTZo (ORCPT ); Tue, 17 Nov 2015 14:25:44 -0500 Received: from mail-wm0-f51.google.com ([74.125.82.51]:32963 "EHLO mail-wm0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754509AbbKQTZi (ORCPT ); Tue, 17 Nov 2015 14:25:38 -0500 MIME-Version: 1.0 In-Reply-To: <20151117192141.GD108807@ubuntu-hedt> References: <1447778351-118699-1-git-send-email-seth.forshee@canonical.com> <20151117170556.GV22011@ZenIV.linux.org.uk> <20151117172551.GA108807@ubuntu-hedt> <20151117175506.GW22011@ZenIV.linux.org.uk> <20151117183444.GB108807@ubuntu-hedt> <20151117192141.GD108807@ubuntu-hedt> Date: Tue, 17 Nov 2015 21:25:37 +0200 Message-ID: Subject: Re: [PATCH v3 0/7] User namespace mount updates From: Octavian Purdila To: Seth Forshee Cc: Richard Weinberger , Al Viro , "Eric W. Biederman" , linux-bcache@vger.kernel.org, device-mapper development , "linux-raid@vger.kernel.org" , "linux-mtd@lists.infradead.org" , linux-fsdevel , LSM , selinux@tycho.nsa.gov, Serge Hallyn , Andy Lutomirski , LKML , "Theodore Ts'o" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1719 Lines: 37 On Tue, Nov 17, 2015 at 9:21 PM, Seth Forshee wrote: > > On Tue, Nov 17, 2015 at 08:12:31PM +0100, Richard Weinberger wrote: > > On Tue, Nov 17, 2015 at 7:34 PM, Seth Forshee > > wrote: > > > On Tue, Nov 17, 2015 at 05:55:06PM +0000, Al Viro wrote: > > >> On Tue, Nov 17, 2015 at 11:25:51AM -0600, Seth Forshee wrote: > > >> > > >> > Shortly after that I plan to follow with support for ext4. I've been > > >> > fuzzing ext4 for a while now and it has held up well, and I'm currently > > >> > working on hand-crafted attacks. Ted has commented privately (to others, > > >> > not to me personally) that he will fix bugs for such attacks, though I > > >> > haven't seen any public comments to that effect. > > >> > > >> _Static_ attacks, or change-image-under-mounted-fs attacks? > > > > > > Right now only static attacks, change-image-under-mounted-fs attacks > > > will be next. > > > > Do we *really* need to enable unprivileged mounting of kernel filesystems? > > What about just enabling fuse and implement ext4 and friends as fuse > > filesystems? > > Using the approaching Linux Kernel Libary[1] this is easy. > > I haven't looked at this project, but I'm guessing that programs must be > written specifically to make use of it? I.e. you can't just use the > mount syscall, and thus all existing software still doesn't work? > The projects includes a lklfuse program that uses fuse to mount a fileystem image. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/