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From: Larry Finger <Larry.Finger@lwfinger.net>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>, linux-staging@lists.linux.dev
Subject: kernel BUG in new r8188eu
Date: Fri, 30 Jul 2021 14:59:44 -0500	[thread overview]
Message-ID: <80042e9f-6811-38f3-010b-1c0951ba88db@lwfinger.net> (raw)

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

             reply	other threads:[~2021-07-30 19:59 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-30 19:59 Larry Finger [this message]
2021-07-31  5:37 ` Greg Kroah-Hartman
2021-07-31 16:18   ` Larry Finger
2021-07-31 18:53     ` Fabio Aiuto
2021-07-31 21:54       ` Larry Finger
2021-08-01  6:31     ` Greg Kroah-Hartman
2021-08-01 20:15       ` Larry Finger
2021-08-02 10:36         ` Greg Kroah-Hartman
2021-08-02 11:45           ` Fabio M. De Francesco
2021-08-02 14:38             ` Greg Kroah-Hartman
2021-08-02 14:40             ` Larry Finger
2021-08-02 15:46               ` Greg Kroah-Hartman
2021-08-02 14:49           ` Larry Finger

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