From: Alan Stern <stern@rowland.harvard.edu>
To: CJ <firefly0158@163.com>
Cc: gregkh@linuxfoundation.org, kees@kernel.org,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [BUG] usb: dummy_hcd: general protection fault in set_link_state on unbind
Date: Thu, 17 Sep 2026 11:08:52 -0400 [thread overview]
Message-ID: <bfaf8216-d618-4062-b3f7-ae4da2fccd3b@rowland.harvard.edu> (raw)
In-Reply-To: <34667d49.9099.1a09f41e473.Coremail.firefly0158@163.com>
On Thu, Sep 17, 2026 at 04:00:00PM +0800, CJ wrote:
>
> Hi,
>
>
> I am reporting a general protection fault in the dummy_hcd link-state handling,
> triggered by a syzkaller USB reproducer. The issue is reproducible with HEAD
> commit cee9395acd8043be0644b25c34bfa86623f2b935 (v7.3-rc1, Linux 7.3.0-rc1).
>
>
> The reproducer connects a synthetic HID USB device through dummy_hcd and then
> unbinds the dummy_hcd.0 platform device by writing its name to the driver's
> unbind attribute. The failure happens during the teardown that follows.
This patch:
https://lore.kernel.org/linux-usb/18ec3122-7566-49e5-9964-1028857405b1@mail.kernel.org/
was submitted at the end of July but it hasn't been merged yet. Does it
fix the problem?
Alan Stern
prev parent reply other threads:[~2026-09-17 15:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-17 8:00 CJ
2026-09-17 8:07 ` Greg KH
2026-09-17 15:08 ` Alan Stern [this message]
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