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From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: "Serge E. Hallyn" <serge@hallyn.com>
Cc: Serge Hallyn <serge.hallyn@ubuntu.com>,
	Djalal Harouni <tixxdz@gmail.com>, Chris Mason <clm@fb.com>,
	tytso@mit.edu, Serge Hallyn <serge.hallyn@canonical.com>,
	Josh Triplett <josh@joshtriplett.org>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Andy Lutomirski <luto@kernel.org>,
	Seth Forshee <seth.forshee@canonical.com>,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-security-module@vger.kernel.org,
	Dongsu Park <dongsu@endocode.com>,
	David Herrmann <dh.herrmann@googlemail.com>,
	Miklos Szeredi <mszeredi@redhat.com>,
	Alban Crequy <alban.crequy@gmail.com>,
	Al Viro <viro@ZenIV.linux.org.uk>
Subject: Re: [RFC 1/1] shiftfs: uid/gid shifting bind mount
Date: Tue, 17 May 2016 06:23:17 -0400	[thread overview]
Message-ID: <1463480597.2509.0.camel@HansenPartnership.com> (raw)
In-Reply-To: <20160517034712.GA10436@mail.hallyn.com>

On Mon, 2016-05-16 at 22:47 -0500, Serge E. Hallyn wrote:
> On Mon, May 16, 2016 at 10:28:32PM -0400, James Bottomley wrote:
> > On Mon, 2016-05-16 at 19:41 +0000, Serge Hallyn wrote:
> > > Hey James,
> > > 
> > > I probably did something wrong - but i applied your patch onto
> > > 4.6,
> > > compiled in shiftfs, did
> > > 
> > > mount -t shiftfs -o uidmap=0:100000:65536,gidmap=0:100000:65536
> > > /home/ubuntu /mnt
> > > 
> > > and ls segfaults and gives me kernel syslog msgs like:
> > 
> > Hm, it looks to be something IMA related, since the SUSE default is
> > no
> > IMA and this BUG in the filesystem is to do with the IMA version of
> > i_readcount_dec.  I'll recompile my kernel to see if I can
> > reproduce. 
> >  Just in case, what's the underlying filesystem on /home/ubuntu?
> 
> It was ext4

Thanks.  I've got it to reproduce with CONFIG_IMA set ... just
debugging now.

James

  reply	other threads:[~2016-05-17 10:23 UTC|newest]

Thread overview: 82+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-12 19:06 [RFC 0/1] shiftfs: uid/gid shifting filesystem James Bottomley
2016-05-12 19:07 ` [RFC 1/1] shiftfs: uid/gid shifting bind mount James Bottomley
2016-05-16 19:41   ` Serge Hallyn
2016-05-17  2:28     ` James Bottomley
2016-05-17  3:47       ` Serge E. Hallyn
2016-05-17 10:23         ` James Bottomley [this message]
2016-05-17 20:59           ` James Bottomley
2016-05-19  2:28             ` Serge E. Hallyn
2016-05-19 10:53               ` James Bottomley
2017-02-04 19:18 [RFC 0/1] shiftfs: uid/gid shifting filesystem (s_user_ns version) James Bottomley
2017-02-04 19:19 ` [RFC 1/1] shiftfs: uid/gid shifting bind mount James Bottomley
2017-02-05  7:51   ` Amir Goldstein
2017-02-06  1:18     ` James Bottomley
2017-02-06  6:59       ` Amir Goldstein
2017-02-06 14:41         ` James Bottomley
2017-02-14 23:03       ` Vivek Goyal
2017-02-14 23:45         ` James Bottomley
2017-02-15 14:17           ` Vivek Goyal
2017-02-16 15:51             ` James Bottomley
2017-02-16 16:42               ` Vivek Goyal
2017-02-16 16:58                 ` James Bottomley
2017-02-17  1:57                   ` Eric W. Biederman
2017-02-17  8:39                     ` Djalal Harouni
2017-02-17 17:19                     ` James Bottomley
2017-02-20  4:24                       ` Eric W. Biederman
2017-02-22 12:01                         ` James Bottomley
2017-02-06  3:25   ` J. R. Okajima
2017-02-06  6:38     ` Amir Goldstein
2017-02-06 16:29       ` James Bottomley
2017-02-06  6:46     ` James Bottomley
2017-02-06 14:50       ` Theodore Ts'o
2017-02-06 15:18         ` James Bottomley
2017-02-06 15:38           ` lkml
2017-02-06 17:32             ` James Bottomley
2017-02-06 21:52           ` J. Bruce Fields
2017-02-07  0:10             ` James Bottomley
2017-02-07  1:35               ` J. Bruce Fields
2017-02-07 19:01                 ` James Bottomley
2017-02-07 19:47                   ` Christoph Hellwig
2017-02-06 16:24       ` J. R. Okajima
2017-02-21  0:48         ` James Bottomley
2017-02-21  2:57           ` J. R. Okajima
2017-02-21  4:07             ` James Bottomley
2017-02-21  4:34               ` J. R. Okajima
2017-02-07  9:19   ` Christoph Hellwig
2017-02-07  9:39     ` Djalal Harouni
2017-02-07  9:53       ` Christoph Hellwig
2017-02-07 16:37     ` James Bottomley
2017-02-07 17:59       ` Amir Goldstein
2017-02-07 18:10         ` Christoph Hellwig
2017-02-07 19:02           ` James Bottomley
2017-02-07 19:49             ` Christoph Hellwig
2017-02-07 20:05               ` James Bottomley
2017-02-07 21:01                 ` Amir Goldstein
2017-02-07 22:25                   ` Christoph Hellwig
2017-02-07 23:42                     ` James Bottomley
2017-02-08  6:44                       ` Amir Goldstein
2017-02-08 11:45                         ` Konstantin Khlebnikov
2017-02-08 14:57                         ` James Bottomley
2017-02-08 15:15                         ` James Bottomley
2017-02-08  1:54               ` Josh Triplett
2017-02-08 15:22                 ` James Bottomley
2017-02-09 10:36                   ` Josh Triplett
2017-02-09 15:34                     ` James Bottomley
2017-02-13 10:15                       ` Eric W. Biederman
2017-02-15  9:33                         ` Djalal Harouni
2017-02-15  9:37                           ` Eric W. Biederman
2017-02-15 10:04                             ` Djalal Harouni
2017-02-07 18:20         ` James Bottomley
2017-02-07 19:48           ` Djalal Harouni
2017-02-15 20:34   ` Vivek Goyal
2017-02-16 15:56     ` James Bottomley
2017-02-17  2:55       ` Al Viro
2017-02-17 17:34         ` James Bottomley
2017-02-17 20:35           ` Vivek Goyal
2017-02-19  3:24             ` James Bottomley
2017-02-20 19:26               ` Vivek Goyal
2017-02-21  0:38                 ` James Bottomley
2017-02-17  2:29   ` Al Viro
2017-02-17 17:24     ` James Bottomley
2017-02-17 17:51       ` Al Viro
2017-02-17 20:27         ` Vivek Goyal
2017-02-17 20:50         ` James Bottomley

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