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Date: Fri, 23 Sep 2016 12:04:31 +0200
From: Wim Osterholt <wim@djo.tudelft.nl>
To: Oliver Neukum <oneukum@suse.com>
Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
        Wim Osterholt <wim@djo.tudelft.nl>
Subject: Re: crash by cdc_acm driver in kernels 4.8-rc1/5
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On Thu, Sep 22, 2016 at 04:40:50PM +0200, Oliver Neukum wrote:
> 
> dmesg -c
> echo 9 > /proc/sysrq-trigger
> modprobe cdc_acm
> echo "module cdc_acm +mpf" > /sys/kernel/debug/dynamic_debug/control
> 
> [plug your device in]
> 
> and provide the full output of dmesg after that.

That is not possible under a 4.8 kernel.

'Fixing recursive fault but reboot is needed!' and frozen it is.


Regards, Wim.