linux-kernel - Re: [PATCH v2] HID: magicmouse: fix crash when disconnecting Magic Trackpad 2

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Date:   Wed, 26 May 2021 12:44:37 +0200 (CEST)
From:   Jiri Kosina <jikos@...nel.org>
To:     José Expósito <jose.exposito89@...il.com>
cc:     benjamin.tissoires@...hat.com, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] HID: magicmouse: fix crash when disconnecting Magic
 Trackpad 2

On Mon, 10 May 2021, José Expósito wrote:

> When the Apple Magic Trackpad 2 is connected over USB it registers four
> hid_device report descriptors, however, the driver only handles the one
> with type HID_TYPE_USBMOUSE and ignores the other three, thus, no driver
> data is attached to them.
> 
> When the device is disconnected, the remove callback is called for the
> four hid_device report descriptors, crashing when the driver data is
> NULL.
> 
> Check that the driver data is not NULL before using it in the remove
> callback.

Applied, thank you.

-- 
Jiri Kosina
SUSE Labs