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: Re: [PATCH v3 0/3] io_uring: add restrictions to support untrusted applications and guests
Date: Thu, 6 Aug 2020 09:49:29 +0200 [thread overview]
Message-ID: <20200806074929.bl6utxrmmx3hf2y2@steredhat> (raw)
In-Reply-To: <20200728160101.48554-1-sgarzare@redhat.com>
Gentle ping.
I'll rebase on master, but if there are any things that I can improve,
I'll be happy to do.
Thanks,
Stefano
On Tue, Jul 28, 2020 at 06:00:58PM +0200, Stefano Garzarella wrote:
> 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
>
prev parent reply other threads:[~2020-08-06 11:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-28 16:00 [PATCH v3 0/3] io_uring: add restrictions to support untrusted applications and guests Stefano Garzarella
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 ` Stefano Garzarella [this message]
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