From: sashiko-bot@kernel.org
To: "Yaohan Li" <shunsheng1218@gmail.com>
Cc: linux-usb@vger.kernel.org
Subject: Re: [PATCH] usb: typec: tcpci: free IRQ before unregistering TCPM port
Date: Wed, 04 Nov 2026 10:02:32 +0000 [thread overview]
Message-ID: <sashiko-outbox-197022@kernel.org> (raw)
In-Reply-To: <179378589227.74015.8259496684787732118@gmail.com>
> tcpci_remove() unregisters the TCPM port before the managed threaded
> IRQ has been released. The IRQ handler can still queue work on the
> TCPM port worker after unregister has destroyed that worker, causing
> a use-after-free.
>
> Free and synchronize the managed IRQ before calling
> tcpci_unregister_port(). This ensures no new alert callback can
> queue work after the TCPM worker has been torn down.
>
> A KASAN test using a simulated I2C TCPCI device reproduced the
> race while unregistering the port. The corresponding teardown
> sequence produced no report after the change.
>
> Fixes: ae8a2ca8a2215 ("usb: typec: Group all TCPCI/TCPM code together")
> Assisted-by: ZCode:GLM-4
> Signed-off-by: Yaohan Li <shunsheng1218@gmail.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/179378589227.74015.8259496684787732118@gmail.com?part=1
prev parent reply other threads:[~2026-11-04 10:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-04 9:51 [PATCH] usb: typec: tcpci: free IRQ before unregistering TCPM port Yaohan Li
2026-11-04 10:02 ` sashiko-bot [this message]
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