Re: [PATCH] NFC: pn533: fix bulk-message timeout

[Greg Kroah-Hartman]

On Mon, Jan 13, 2020 at 06:23:58PM +0100, Johan Hovold wrote:
> The driver was doing a synchronous uninterruptible bulk-transfer 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.
> 
> An arbitrary limit of five seconds should be more than enough.
> 
> Fixes: dbafc28955fa ("NFC: pn533: don't send USB data off of the stack")
> Cc: stable <stable@xxxxxxxxxxxxxxx>     # 4.18
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
> ---
>  drivers/nfc/pn533/usb.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)


Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>