Linux-Fsdevel Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Stefano Garzarella <sgarzare@redhat.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: io-uring@vger.kernel.org,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Kees Cook <keescook@chromium.org>, Jeff Moyer <jmoyer@redhat.com>,
	Kernel Hardening <kernel-hardening@lists.openwall.com>,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	Aleksa Sarai <asarai@suse.de>, Sargun Dhillon <sargun@sargun.me>,
	Stefan Hajnoczi <stefanha@redhat.com>,
	Christian Brauner <christian.brauner@ubuntu.com>,
	Jann Horn <jannh@google.com>
Subject: [PATCH v3 0/3] io_uring: add restrictions to support untrusted applications and guests
Date: Tue, 28 Jul 2020 18:00:58 +0200	[thread overview]
Message-ID: <20200728160101.48554-1-sgarzare@redhat.com> (raw)

v3:
 - added IORING_RESTRICTION_SQE_FLAGS_ALLOWED and
   IORING_RESTRICTION_SQE_FLAGS_REQUIRED
 - removed IORING_RESTRICTION_FIXED_FILES_ONLY opcode
 - enabled restrictions only when the rings start

RFC v2: https://lore.kernel.org/io-uring/20200716124833.93667-1-sgarzare@redhat.com

RFC v1: https://lore.kernel.org/io-uring/20200710141945.129329-1-sgarzare@redhat.com

Following the proposal that I send about restrictions [1], I wrote this series
to add restrictions in io_uring.

I also wrote helpers in liburing and a test case (test/register-restrictions.c)
available in this repository:
https://github.com/stefano-garzarella/liburing (branch: io_uring_restrictions)

Just to recap the proposal, the idea is to add some restrictions to the
operations (sqe opcode and flags, register opcode) to safely allow untrusted
applications or guests to use io_uring queues.

The first patch changes io_uring_register(2) opcodes into an enumeration to
keep track of the last opcode available.

The second patch adds IOURING_REGISTER_RESTRICTIONS opcode and the code to
handle restrictions.

The third patch adds IORING_SETUP_R_DISABLED flag to start the rings disabled,
allowing the user to register restrictions, buffers, files, before to start
processing SQEs.

Comments and suggestions are very welcome.

Thank you in advance,
Stefano

[1] https://lore.kernel.org/io-uring/20200609142406.upuwpfmgqjeji4lc@steredhat/

Stefano Garzarella (3):
  io_uring: use an enumeration for io_uring_register(2) opcodes
  io_uring: add IOURING_REGISTER_RESTRICTIONS opcode
  io_uring: allow disabling rings during the creation

 fs/io_uring.c                 | 167 ++++++++++++++++++++++++++++++++--
 include/uapi/linux/io_uring.h |  60 +++++++++---
 2 files changed, 207 insertions(+), 20 deletions(-)

-- 
2.26.2


             reply	other threads:[~2020-07-28 16:01 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-28 16:00 Stefano Garzarella [this message]
2020-07-28 16:00 ` [PATCH v3 1/3] io_uring: use an enumeration for io_uring_register(2) opcodes Stefano Garzarella
2020-07-28 16:01 ` [PATCH v3 2/3] io_uring: add IOURING_REGISTER_RESTRICTIONS opcode Stefano Garzarella
2020-07-28 16:01 ` [PATCH v3 3/3] io_uring: allow disabling rings during the creation Stefano Garzarella
2020-08-06  7:49 ` [PATCH v3 0/3] io_uring: add restrictions to support untrusted applications and guests Stefano Garzarella

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200728160101.48554-1-sgarzare@redhat.com \
    --to=sgarzare@redhat.com \
    --cc=asarai@suse.de \
    --cc=axboe@kernel.dk \
    --cc=christian.brauner@ubuntu.com \
    --cc=io-uring@vger.kernel.org \
    --cc=jannh@google.com \
    --cc=jmoyer@redhat.com \
    --cc=keescook@chromium.org \
    --cc=kernel-hardening@lists.openwall.com \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=sargun@sargun.me \
    --cc=stefanha@redhat.com \
    --cc=viro@zeniv.linux.org.uk \
    --subject='Re: [PATCH v3 0/3] io_uring: add restrictions to support untrusted applications and guests' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).