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Re: [PATCH v3 0/7] User namespace mount updates

From Seth Forshee <seth.forshee@canonical.com>
Newsgroups linux.kernel
Subject Re: [PATCH v3 0/7] User namespace mount updates
Date 2015-11-17 20:30 +0100
Message-ID <qvU6Z-N7-13@gated-at.bofh.it> (permalink)
References (1 earlier) <qvRVv-7TO-11@gated-at.bofh.it> <qvSeT-81H-29@gated-at.bofh.it> <qvSHV-8dG-19@gated-at.bofh.it> <qvTkC-f2-3@gated-at.bofh.it> <qvTXk-J9-9@gated-at.bofh.it>
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On Tue, Nov 17, 2015 at 08:12:31PM +0100, Richard Weinberger wrote:
> On Tue, Nov 17, 2015 at 7:34 PM, Seth Forshee
> <seth.forshee@canonical.com> 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?

> [1] https://lkml.org/lkml/2015/11/3/706
> -- 
> Thanks,
> //richard
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Thread

[PATCH v3 0/7] User namespace mount updates Seth Forshee <seth.forshee@canonical.com> - 2015-11-17 17:50 +0100
  [PATCH v3 1/7] block_dev: Support checking inode permissions in lookup_bdev() Seth Forshee <seth.forshee@canonical.com> - 2015-11-17 17:50 +0100
  [PATCH v3 2/7] block_dev: Check permissions towards block device inode when mounting Seth Forshee <seth.forshee@canonical.com> - 2015-11-17 17:50 +0100
  [PATCH v3 3/7] mtd: Check permissions towards mtd block device inode when mounting Seth Forshee <seth.forshee@canonical.com> - 2015-11-17 17:50 +0100
  Re: [PATCH v3 0/7] User namespace mount updates Al Viro <viro@ZenIV.linux.org.uk> - 2015-11-17 18:10 +0100
    Re: [PATCH v3 0/7] User namespace mount updates Seth Forshee <seth.forshee@canonical.com> - 2015-11-17 18:30 +0100
      Re: [PATCH v3 0/7] User namespace mount updates "Serge E. Hallyn" <serge@hallyn.com> - 2015-11-17 18:50 +0100
      Re: [PATCH v3 0/7] User namespace mount updates Al Viro <viro@ZenIV.linux.org.uk> - 2015-11-17 19:00 +0100
        Re: [PATCH v3 0/7] User namespace mount updates Seth Forshee <seth.forshee@canonical.com> - 2015-11-17 19:40 +0100
          Re: [PATCH v3 0/7] User namespace mount updates Richard Weinberger <richard.weinberger@gmail.com> - 2015-11-17 20:20 +0100
            Re: [PATCH v3 0/7] User namespace mount updates Octavian Purdila <octavian.purdila@intel.com> - 2015-11-17 20:30 +0100
              Re: [PATCH v3 0/7] User namespace mount updates Richard Weinberger <richard@nod.at> - 2015-11-17 21:20 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Octavian Purdila <octavian.purdila@intel.com> - 2015-11-17 23:10 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Seth Forshee <seth.forshee@canonical.com> - 2015-11-19 16:30 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Octavian Purdila <octavian.purdila@intel.com> - 2015-11-19 17:20 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Seth Forshee <seth.forshee@canonical.com> - 2015-11-19 17:40 +0100
                Re: [PATCH v3 0/7] User namespace mount updates "Serge E. Hallyn" <serge.hallyn@ubuntu.com> - 2015-11-20 18:40 +0100
            Re: [PATCH v3 0/7] User namespace mount updates Richard Weinberger <richard@nod.at> - 2015-11-17 20:30 +0100
            Re: [PATCH v3 0/7] User namespace mount updates Seth Forshee <seth.forshee@canonical.com> - 2015-11-17 20:30 +0100
          Re: [PATCH v3 0/7] User namespace mount updates Theodore Ts'o <tytso@mit.edu> - 2015-11-18 20:20 +0100
            Re: [PATCH v3 0/7] User namespace mount updates Seth Forshee <seth.forshee@canonical.com> - 2015-11-18 20:30 +0100
            Re: [PATCH v3 0/7] User namespace mount updates Serge Hallyn <serge.hallyn@ubuntu.com> - 2015-11-18 20:40 +0100
        Re: [PATCH v3 0/7] User namespace mount updates Austin S Hemmelgarn <ahferroin7@gmail.com> - 2015-11-17 20:10 +0100
          Re: [PATCH v3 0/7] User namespace mount updates Seth Forshee <seth.forshee@canonical.com> - 2015-11-17 20:20 +0100
            Re: [PATCH v3 0/7] User namespace mount updates Austin S Hemmelgarn <ahferroin7@gmail.com> - 2015-11-17 22:00 +0100
              Re: [PATCH v3 0/7] User namespace mount updates Seth Forshee <seth.forshee@canonical.com> - 2015-11-17 22:40 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Austin S Hemmelgarn <ahferroin7@gmail.com> - 2015-11-18 13:30 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Seth Forshee <seth.forshee@canonical.com> - 2015-11-18 15:30 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Al Viro <viro@ZenIV.linux.org.uk> - 2015-11-18 16:00 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Seth Forshee <seth.forshee@canonical.com> - 2015-11-18 16:10 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Al Viro <viro@ZenIV.linux.org.uk> - 2015-11-18 16:20 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Richard Weinberger <richard.weinberger@gmail.com> - 2015-11-18 16:30 +0100
                Re: [PATCH v3 0/7] User namespace mount updates James Morris <jmorris@namei.org> - 2015-11-19 08:50 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Richard Weinberger <richard@nod.at> - 2015-11-19 09:00 +0100
                Re: [PATCH v3 0/7] User namespace mount updates "Serge E. Hallyn" <serge.hallyn@ubuntu.com> - 2015-11-19 15:30 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Richard Weinberger <richard@nod.at> - 2015-11-19 16:10 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Colin Walters <walters@verbum.org> - 2015-11-19 15:40 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Richard Weinberger <richard@nod.at> - 2015-11-19 15:50 +0100
                Re: [PATCH v3 0/7] User namespace mount updates "Richard W.M. Jones" <rjones@redhat.com> - 2015-11-19 16:20 +0100
                Re: [PATCH v3 0/7] User namespace mount updates "Serge E. Hallyn" <serge.hallyn@ubuntu.com> - 2015-11-19 16:00 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Nikolay Borisov <kernel@kyup.com> - 2015-11-18 16:40 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Austin S Hemmelgarn <ahferroin7@gmail.com> - 2015-11-18 16:40 +0100
          Re: [PATCH v3 0/7] User namespace mount updates Al Viro <viro@ZenIV.linux.org.uk> - 2015-11-17 20:40 +0100
            Re: [PATCH v3 0/7] User namespace mount updates Austin S Hemmelgarn <ahferroin7@gmail.com> - 2015-11-17 21:40 +0100
              Re: [PATCH v3 0/7] User namespace mount updates Al Viro <viro@ZenIV.linux.org.uk> - 2015-11-17 22:10 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Seth Forshee <seth.forshee@canonical.com> - 2015-11-17 23:10 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Austin S Hemmelgarn <ahferroin7@gmail.com> - 2015-11-18 13:50 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Seth Forshee <seth.forshee@canonical.com> - 2015-11-18 15:40 +0100
                Re: [PATCH v3 0/7] User namespace mount updates Austin S Hemmelgarn <ahferroin7@gmail.com> - 2015-11-18 16:40 +0100
            Re: [PATCH v3 0/7] User namespace mount updates bfields@fieldses.org (J. Bruce Fields) - 2015-11-18 19:50 +0100

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