Messages in this thread | | | Date | Thu, 29 Jun 2023 13:27:10 +0000 | Subject | [PATCH v2 0/1] Add a sysctl to disable io_uring system-wide | From | Matteo Rizzo <> |
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Over the last few years we've seen many critical vulnerabilities in io_uring[1] which could be exploited by an unprivileged process to gain control over the kernel. This patch introduces a new sysctl which disables the creation of new io_uring instances system-wide.
The goal of this patch is to give distros, system admins, and cloud providers a way to reduce the risk of privilege escalation through io_uring where disabling it with seccomp or at compile time is not practical. For example a distro or cloud provider might want to disable io_uring by default and have users enable it again if they need to run a program that requires it. The new sysctl is designed to let a user with root on the machine enable and disable io_uring systemwide at runtime without requiring a kernel recompilation or a reboot.
[1] Link: https://goo.gle/limit-iouring
--- v2: * Documentation style fixes * Add a third level that only disables io_uring for unprivileged processes
Matteo Rizzo (1): Add a new sysctl to disable io_uring system-wide
Documentation/admin-guide/sysctl/kernel.rst | 19 +++++++++++++ io_uring/io_uring.c | 30 +++++++++++++++++++++ 2 files changed, 49 insertions(+)
-- 2.41.0.162.gfafddb0af9-goog
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