linux-kernel - Re: [PATCH] Input: keyspan-remote: fix control-message timeouts

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Date:   Mon, 13 Jan 2020 19:26:12 +0100
From:   Greg KH <greg@...ah.com>
To:     Johan Hovold <johan@...nel.org>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-input@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable <stable@...r.kernel.org>
Subject: Re: [PATCH] Input: keyspan-remote: fix control-message timeouts

On Mon, Jan 13, 2020 at 06:17:15PM +0100, Johan Hovold wrote:
> The driver was issuing synchronous uninterruptible control requests
> without using a timeout. This could lead to the driver hanging on probe
> due to a malfunctioning (or malicious) device until the device is
> physically disconnected. While sleeping in probe the driver prevents
> other devices connected to the same hub from being added to (or removed
> from) the bus.
> 
> The USB upper limit of five seconds per request should be more than
> enough.
> 
> Fixes: 99f83c9c9ac9 ("[PATCH] USB: add driver for Keyspan Digital Remote")
> Cc: stable <stable@...r.kernel.org>     # 2.6.13
> Signed-off-by: Johan Hovold <johan@...nel.org>
> ---
>  drivers/input/misc/keyspan_remote.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>