From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932748AbcI2N0S (ORCPT ); Thu, 29 Sep 2016 09:26:18 -0400 Received: from x127155.tudelft.net ([131.180.127.155]:56990 "EHLO djo.tudelft.nl" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753461AbcI2N0Q (ORCPT ); Thu, 29 Sep 2016 09:26:16 -0400 Date: Thu, 29 Sep 2016 15:26:12 +0200 From: Wim Osterholt To: Oliver Neukum Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Wim Osterholt Subject: Re: crash by cdc_acm driver in kernels 4.8-rc1/5 Message-ID: <20160929132612.GA7313@djo.tudelft.nl> Reply-To: wim@djo.tudelft.nl References: <20160912024340.GA16266@djo.tudelft.nl> <1474376714.4358.28.camel@suse.com> <20160920154520.GA12174@djo.tudelft.nl> <1474460477.2675.19.camel@suse.com> <20160921164122.GB18823@djo.tudelft.nl> <1474555250.30534.1.camel@suse.com> <20160927163414.GA21487@djo.tudelft.nl> <1475054164.4635.7.camel@suse.com> <20160928150856.GA1424@djo.tudelft.nl> <1475076210.4635.18.camel@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1475076210.4635.18.camel@suse.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 28, 2016 at 05:23:30PM +0200, Oliver Neukum wrote: > > > > HP src # sync > > HP src # [ 3744.914184] BUG: unable to handle kernel NULL pointer dereference at 00000249 > > The last view lines before that please with the debugging level ramped > up to 9 please. Recompiled again, double checked if it was really the new module. That doesn't seem to make any difference at all. [ 549.238494] sysrq: SysRq : Changing Loglevel [ 549.265916] sysrq: Loglevel set to 9 [ 549.363794] usbcore: registered new interface driver cdc_acm [ 549.429906] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters [ 550.941964] usb 6-1: new full-speed USB device number 2 using uhci_hcd [ 551.148944] usb 6-1: New USB device found, idVendor=0572, idProduct=1340 [ 551.149975] usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 551.153974] usb 6-1: Product: USB Modem [ 551.157969] usb 6-1: Manufacturer: Conexant [ 551.161969] usb 6-1: SerialNumber: 12345678 [ 551.171006] cdc_acm:acm_probe: cdc_acm 6-1:1.0: interfaces are valid [ 551.173997] BUG: unable to handle kernel NULL pointer dereference at 00000249 [ 551.177957] IP: [] acm_probe+0x52d/0xced [cdc_acm] [ 551.177957] *pde = 00000000 [ 551.177957] Oops: 0000 [#1] SMP [ 551.177957] Modules linked in: cdc_acm nouveau video drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm agpgart i2c_algo_bit cfg80211 rfkill binfmt_misc svgalib_helper(O) snd_pcm_oss snd_mixer_oss fbcon bitblit softcursor font tileblit sr9700 snd_hda_codec_generic dm9601 snd_hda_intel usbnet usb_storage mii snd_hda_codec snd_hwdep tg3 snd_hda_core ptp pps_core snd_pcm gpio_ich libphy snd_timer lpc_ich ppdev firmware_class pcspkr mfd_core snd ohci_pci ohci_hcd uhci_hcd wmi floppy parport_pc soundcore ehci_pci parport acpi_cpufreq ehci_hcd button processor [ 551.177957] CPU: 0 PID: 725 Comm: kworker/0:2 Tainted: G O 4.8.0-rc8 #1 .... Regards, Wim.