From: sashiko-bot@kernel.org
To: "Markus Probst" <markus.probst@posteo.de>
Cc: linux-serial@vger.kernel.org, ojeda@kernel.org
Subject: Re: [PATCH 2/5] rust: serdev: Replace `active` mutex with receive pause
Date: Sun, 06 Sep 2026 16:09:51 +0000 [thread overview]
Message-ID: <20260906160952.034971F00A3A@smtp.kernel.org> (raw)
In-Reply-To: <20260906-rust_serdev_probe_refactor-v1-2-69cdae0074ec@posteo.de>
> There are currently 2 race conditions:
> - in probe if `Driver::probe` returns Err
> - in unbind
> . In those cases the driver data will be set to NULL before the serdev
> device was closed. If data is received while the driver data is dropped,
> the `receive_buf_callback` might try to access the `active` mutex on a
> null pointer.
>
> Removing the need for `receive_buf_callback` to lock the `active` mutex
> fixes these.
>
> Fixes: 99f59aa82341 ("rust: add basic serial device bus abstractions")
> Reported-by: Sashiko Bot <sashiko-bot@kernel.org>
> Closes: https://lore.kernel.org/linux-serial/20260905000836.C8FC91F00A3D@smtp.kernel.org/
> Closes: https://lore.kernel.org/linux-serial/20260903222159.70A911F000E9@smtp.kernel.org/
> Signed-off-by: Markus Probst <markus.probst@posteo.de>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260906-rust_serdev_probe_refactor-v1-0-69cdae0074ec@posteo.de?part=2
next prev parent reply other threads:[~2026-09-06 16:09 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-06 15:55 [PATCH 0/5] rust: serdev: Refactor Markus Probst
2026-09-06 15:55 ` [PATCH 1/5] tty: serdev: Export functions to pause receive_buf callback calls Markus Probst
2026-09-06 16:08 ` sashiko-bot
2026-09-06 15:55 ` [PATCH 2/5] rust: serdev: Replace `active` mutex with receive pause Markus Probst
2026-09-06 16:09 ` sashiko-bot [this message]
2026-09-06 15:55 ` [PATCH 3/5] rust: serdev: Simplify callbacks Markus Probst
2026-09-06 16:13 ` sashiko-bot
2026-09-06 15:55 ` [PATCH 4/5] rust: Add `Device::drvdata_borrow_mut` Markus Probst
2026-09-06 16:08 ` sashiko-bot
2026-09-06 15:55 ` [PATCH 5/5] rust: serdev: Pause receive callback before calling unbind Markus Probst
2026-09-06 16:11 ` sashiko-bot
2026-09-06 16:20 ` Danilo Krummrich
2026-09-06 17:36 ` Markus Probst
2026-09-06 20:13 ` Gary Guo
2026-09-06 22:51 ` Markus Probst
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