From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_MUTT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 30201C31E5B for ; Mon, 17 Jun 2019 18:55:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0FDC22084D for ; Mon, 17 Jun 2019 18:55:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726243AbfFQSzV (ORCPT ); Mon, 17 Jun 2019 14:55:21 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:59742 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725772AbfFQSzV (ORCPT ); Mon, 17 Jun 2019 14:55:21 -0400 Received: from viro by ZenIV.linux.org.uk with local (Exim 4.92 #3 (Red Hat Linux)) id 1hcwmi-0004Gq-Rq; Mon, 17 Jun 2019 18:55:16 +0000 Date: Mon, 17 Jun 2019 19:55:16 +0100 From: Al Viro To: Linus Torvalds Cc: Christian Brauner , "Eric W. Biederman" , Linux List Kernel Mailing , linux-fsdevel , stable Subject: Re: [PATCH] fs/namespace: fix unprivileged mount propagation Message-ID: <20190617185516.GU17978@ZenIV.linux.org.uk> References: <20190617184711.21364-1-christian@brauner.io> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.11.3 (2019-02-01) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Mon, Jun 17, 2019 at 11:50:13AM -0700, Linus Torvalds wrote: > On Mon, Jun 17, 2019 at 11:47 AM Christian Brauner wrote: > > > > When propagating mounts across mount namespaces owned by different user > > namespaces it is not possible anymore to move or umount the mount in the > > less privileged mount namespace. > > I will wait a short while in the hope of getting Al's ack for this, > but since it looks about as good as it likely can be, I suspect I'll > just apply it later today even without such an ack.. Give me a bit; I'm busy digging myself from under the pile of mail accumulated in the last few weeks (bronchitis sucked, especially when it got to the point where one can't stay asleep for more than an hour or get more than about 5 hours per day total). I'm trying not to throw anything relevant out, but if I don't reply to something important today or tomorrow, please resend it my way - the pile had been 36Kmail (down to 24K now) ;-/