linux-kernel - Re: [PATCH] audit,io_uring: io_uring openat triggers audit reference count underflow

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Message-Id: <20231013-karierte-mehrzahl-6a938035609e@brauner>
Date:   Fri, 13 Oct 2023 17:44:36 +0200
From:   Christian Brauner <brauner@...nel.org>
To:     Dan Clash <daclash@...ux.microsoft.com>
Cc:     Christian Brauner <brauner@...nel.org>,
        linux-kernel@...r.kernel.org, paul@...l-moore.com, axboe@...nel.dk,
        linux-fsdevel@...r.kernel.org, dan.clash@...rosoft.com,
        audit@...r.kernel.org, io-uring@...r.kernel.org
Subject: Re: [PATCH] audit,io_uring: io_uring openat triggers audit reference count underflow

On Thu, 12 Oct 2023 14:55:18 -0700, Dan Clash wrote:
> An io_uring openat operation can update an audit reference count
> from multiple threads resulting in the call trace below.
> 
> A call to io_uring_submit() with a single openat op with a flag of
> IOSQE_ASYNC results in the following reference count updates.
> 
> These first part of the system call performs two increments that do not race.
> 
> [...]

Picking this up as is. Let me know if this needs another tree.

---

Applied to the vfs.misc branch of the vfs/vfs.git tree.
Patches in the vfs.misc branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs.misc

[1/1] audit,io_uring: io_uring openat triggers audit reference count underflow
      https://git.kernel.org/vfs/vfs/c/c6f4350ced79