linux-kernel - kernel BUG in new r8188eu

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Message-ID: <80042e9f-6811-38f3-010b-1c0951ba88db@lwfinger.net>
Date:   Fri, 30 Jul 2021 14:59:44 -0500
From:   Larry Finger <Larry.Finger@...inger.net>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, linux-staging@...ts.linux.dev
Subject: kernel BUG in new r8188eu

Greg,

When I unplug the USB device with the driver loaded, I get the following BUG and 
my laptop freezes:

kernel: BUG: unable to handle page fault for address: ffffeb0200043248
kernel: #PF: supervisor read access in kernel mode
kernel: #PF: error_code(0x0000) - not-present page

The traceback points to a kfree() call. I do not understand this BUG. Can you 
explain what happens?

I think I know how to avoid the BUG, but that might be at the expense of a 
memory leak.

Thanks,

Larry