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Re: crash by cdc_acm driver in kernels 4.8-rc1/5

From Oliver Neukum <oneukum@suse.com>
Newsgroups linux.kernel
Subject Re: crash by cdc_acm driver in kernels 4.8-rc1/5
Date 2016-11-21 14:30 +0100
Message-ID <sFWPv-1GV-29@gated-at.bofh.it> (permalink)
References (6 earlier) <sE7P4-2Rf-17@gated-at.bofh.it> <sEa0y-4xX-45@gated-at.bofh.it> <sEk9z-2qc-5@gated-at.bofh.it> <sEr1n-78g-1@gated-at.bofh.it> <sEyvV-3yz-57@gated-at.bofh.it>
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On Thu, 2016-11-17 at 17:11 +0100, Wim Osterholt wrote:

> Nov 17 15:07:51 localhost kernel: Check point  10
> Nov 17 15:07:51 localhost kernel: BUG: unable to handle kernel NULL pointer dereference at 00000249
> Nov 17 15:07:51 localhost kernel: IP: [<e186ece2>] acm_probe+0x559/0xe53 [cdc_acm]
> Nov 17 15:07:51 localhost kernel: *pde = 00000000 
> Nov 17 15:07:51 localhost kernel: Oops: 0000 [#1] SMP

I don't understand it, bit please test the attached patch
with dynamic debugging for cdc-acm and the kernel log level
at maximum. And please repost "lsusb -v" for your device.

	Regards
		Oliver

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Thread

Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Wim Osterholt <wim@djo.tudelft.nl> - 2016-11-15 01:20 +0100
  Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Oliver Neukum <oneukum@suse.com> - 2016-11-15 12:20 +0100
  Re: crash by cdc_acm driver in kernels 4.8-rc1/5 poma <pomidorabelisima@gmail.com> - 2016-11-15 12:30 +0100
    Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Wim Osterholt <wim@djo.tudelft.nl> - 2016-11-15 14:30 +0100
      Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Oliver Neukum <oneukum@suse.com> - 2016-11-16 13:50 +0100
        Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Wim Osterholt <wim@djo.tudelft.nl> - 2016-11-16 16:10 +0100
          Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Wim Osterholt <wim@djo.tudelft.nl> - 2016-11-17 03:00 +0100
            Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Wim Osterholt <wim@djo.tudelft.nl> - 2016-11-17 10:20 +0100
              Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Wim Osterholt <wim@djo.tudelft.nl> - 2016-11-17 18:20 +0100
                Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Oliver Neukum <oneukum@suse.com> - 2016-11-21 14:30 +0100
                Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Wim Osterholt <wim@djo.tudelft.nl> - 2016-11-21 17:00 +0100
                Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Wim Osterholt <wim@djo.tudelft.nl> - 2016-11-21 21:30 +0100
                Re: crash by cdc_acm driver in kernels 4.8-rc1/5 poma <pomidorabelisima@gmail.com> - 2016-11-22 01:00 +0100
                Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Bjørn Mork <bjorn@mork.no> - 2016-11-22 19:00 +0100
                Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Wim Osterholt <wim@djo.tudelft.nl> - 2016-11-23 01:50 +0100
                Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Wim Osterholt <wim@djo.tudelft.nl> - 2016-11-22 16:40 +0100
                Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Bjørn Mork <bjorn@mork.no> - 2016-11-22 19:10 +0100
                Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Wim Osterholt <wim@djo.tudelft.nl> - 2016-11-23 02:00 +0100
                Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Bjørn Mork <bjorn@mork.no> - 2016-11-23 09:00 +0100
                Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Alan Stern <stern@rowland.harvard.edu> - 2016-11-23 16:10 +0100

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