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Wed, 21 Jan 2026 19:37:11 -0800 (PST) Message-ID: <638f241a-6ffd-4827-b5a8-760550aea2a7@kernel.dk> Date: Wed, 21 Jan 2026 20:37:10 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCHSET v6] Inherited restrictions and BPF filtering for io_uring From: Jens Axboe To: io-uring@vger.kernel.org Cc: brauner@kernel.org, jannh@google.com, kees@kernel.org, linux-kernel@vger.kernel.org References: <20260119235456.1722452-1-axboe@kernel.dk> Content-Language: en-US In-Reply-To: <20260119235456.1722452-1-axboe@kernel.dk> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 1/19/26 4:54 PM, Jens Axboe wrote: > Hi, > > Followup to v5 here: > > https://lore.kernel.org/io-uring/20260118172328.1067592-1-axboe@kernel.dk/ > > Mostly just addressing a bit of feedback, feature wise this is all the > same as before. For details on the patches, see the v5 posting linked > above. For details on the changes, see the changes section below. > > Kernel branch can be found here: > > https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git/log/?h=io_uring-bpf-restrictions.3 > > and a liburing branch with support helpers, man page, and a fairly > substantial test case can be found here: > > https://git.kernel.org/pub/scm/linux/kernel/git/axboe/liburing.git/log/?h=bpf-restrictions > > Feedback welcome! > > Changes since v5: > - Disallow setting or appending filters for no_new_privs, unless the > user is also CAP_SYS_ADMIN (Aleksa) > - Add support for filtering of IORING_OP_OPENAT/OPENAT2, in terms of > being able to deny certain resolve or creation flags. > - Change layout of io_uring_bpf_ctx slightly, for easier/faster clearing > of unused members. > - Expand liburing test cases to cover both the no_new_privs situation, > and testing the OPENAT/OPENAT2 filters. > > include/linux/io_uring.h | 14 +- > include/linux/io_uring_types.h | 13 + > include/linux/sched.h | 1 + > include/uapi/linux/io_uring.h | 10 + > include/uapi/linux/io_uring/bpf_filter.h | 62 ++++ > io_uring/Kconfig | 5 + > io_uring/Makefile | 1 + > io_uring/bpf_filter.c | 436 +++++++++++++++++++++++ > io_uring/bpf_filter.h | 48 +++ > io_uring/io_uring.c | 48 +++ > io_uring/io_uring.h | 1 + > io_uring/net.c | 9 + > io_uring/net.h | 6 + > io_uring/openclose.c | 9 + > io_uring/openclose.h | 3 + > io_uring/register.c | 91 +++++ > io_uring/tctx.c | 42 ++- > kernel/fork.c | 5 + > 18 files changed, 794 insertions(+), 10 deletions(-) Any comments on this one? -- Jens Axboe