linux-kernel - [PATCH v3 0/7] User namespace mount updates

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Date:	Tue, 17 Nov 2015 10:39:03 -0600
From:	Seth Forshee <seth.forshee@...onical.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-bcache@...r.kernel.org, dm-devel@...hat.com,
	linux-raid@...r.kernel.org, linux-mtd@...ts.infradead.org,
	linux-fsdevel@...r.kernel.org,
	linux-security-module@...r.kernel.org, selinux@...ho.nsa.gov
Cc:	Alexander Viro <viro@...iv.linux.org.uk>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Andy Lutomirski <luto@...capital.net>,
	linux-kernel@...r.kernel.org,
	Seth Forshee <seth.forshee@...onical.com>
Subject: [PATCH v3 0/7] User namespace mount updates

Hi Eric,

Here's another update to my patches for user namespace mounts, based on
your for-testing branch. These patches add safeguards necessary to allow
unprivileged mounts and update SELinux and Smack to safely handle
device-backed mounts from unprivileged users.

The v2 posting received very little in the way of feedback, so changes
are minimal. I've made a trivial style change to the Smack changes at
Casey's request, and I've added Stephen's ack for the SELinux changes.

Thanks,
Seth

Andy Lutomirski (1):
  fs: Treat foreign mounts as nosuid

Seth Forshee (6):
  block_dev: Support checking inode permissions in lookup_bdev()
  block_dev: Check permissions towards block device inode when mounting
  mtd: Check permissions towards mtd block device inode when mounting
  selinux: Add support for unprivileged mounts from user namespaces
  userns: Replace in_userns with current_in_userns
  Smack: Handle labels consistently in untrusted mounts

 drivers/md/bcache/super.c      |  2 +-
 drivers/md/dm-table.c          |  2 +-
 drivers/mtd/mtdsuper.c         |  6 +++++-
 fs/block_dev.c                 | 18 +++++++++++++++---
 fs/exec.c                      |  2 +-
 fs/namespace.c                 | 13 +++++++++++++
 fs/quota/quota.c               |  2 +-
 include/linux/fs.h             |  2 +-
 include/linux/mount.h          |  1 +
 include/linux/user_namespace.h |  6 ++----
 kernel/user_namespace.c        |  6 +++---
 security/commoncap.c           |  4 ++--
 security/selinux/hooks.c       | 25 ++++++++++++++++++++++++-
 security/smack/smack_lsm.c     | 29 +++++++++++++++++++----------
 14 files changed, 89 insertions(+), 29 deletions(-)

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