From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S941354AbcIHNKm (ORCPT ); Thu, 8 Sep 2016 09:10:42 -0400 Received: from mx2.suse.de ([195.135.220.15]:54476 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S938787AbcIHNKc (ORCPT ); Thu, 8 Sep 2016 09:10:32 -0400 Message-ID: <1473339915.32073.3.camel@suse.com> Subject: Re: crash by cdc_acm driver in kernels 4.8-rc1/5 From: Oliver Neukum To: wim@djo.tudelft.nl Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Date: Thu, 08 Sep 2016 15:05:15 +0200 In-Reply-To: <20160908125850.GC28274@djo.tudelft.nl> References: <20160908115803.GA28274@djo.tudelft.nl> <1473337238.32073.2.camel@suse.com> <20160908125850.GC28274@djo.tudelft.nl> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.12.11 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2016-09-08 at 14:58 +0200, Wim Osterholt wrote: > On Thu, Sep 08, 2016 at 02:20:38PM +0200, Oliver Neukum wrote: > > > > > > The oops tells things that I didn't all write down, but it says > > > null pointer dereference at 00000246 > > > > That is the important part. I am sorry, but without the oops > > nobody can help you. Please capture it > > Sep 6 19:12:37 localhost kernel: usb 7-1: new full-speed USB device number 2 using uhci_hcd > Sep 6 19:12:37 localhost kernel: usb 7-1: New USB device found, idVendor=0572, idProduct=1340 > Sep 6 19:12:37 localhost kernel: usb 7-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 > Sep 6 19:12:37 localhost kernel: usb 7-1: Product: USB Modem > Sep 6 19:12:37 localhost kernel: usb 7-1: Manufacturer: Conexant > Sep 6 19:12:37 localhost kernel: usb 7-1: SerialNumber: 12345678 > Sep 6 19:12:38 localhost mtp-probe[13126]: checking bus 7, device 2: "/sys/devices/pci0000:00/0000:00:1d.3/usb7/7-1" > Sep 6 19:12:38 localhost mtp-probe[13126]: bus: 7, device: 2 was not an MTP device > Sep 6 19:12:38 localhost kernel: BUG: unable to handle kernel NULL pointer dereference at 00000246 > Sep 6 19:12:38 localhost kernel: IP: [] 0xe0a81a35 > Sep 6 19:12:38 localhost kernel: *pde = 00000000 > Sep 6 19:12:38 localhost kernel: Oops: 0000 [#1] SMP > Sep 6 19:12:38 localhost kernel: Modules linked in: cdc_acm(+) nouveau video drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm agpgart i2c_algo_bit lirc_serial(C) lirc_dev(O) cfg80211 rfkill binfmt_misc svgalib_helper(O) snd_pcm_oss snd_mixer_oss fbcon bitblit softcursor font tileblit sr9700 dm9601 usbnet usb_storage mii snd_hda_codec_generic tg3 snd_hda_intel snd_hda_codec ptp snd_hwdep pps_core gpio_ich snd_hda_core libphy ppdev firmware_class uhci_hcd pcspkr snd_pcm ohci_pci ohci_hcd lpc_ich ehci_pci snd_timer ehci_hcd mfd_core snd usbcore floppy soundcore wmi parport_pc usb_common parport acpi_cpufreq processor button > Sep 6 19:12:38 localhost kernel: CPU: 0 PID: 13127 Comm: udevd Tainted: G C O 4.8.0-rc5 #1 > Sep 6 19:12:38 localhost kernel: Hardware name: Hewlett-Packard HP xw4300 Workstation/0A00h, BIOS 786D3 v01.08 03/10/2006 > Sep 6 19:12:38 localhost kernel: task: df639c00 task.stack: df4d6000 > Sep 6 19:12:38 localhost kernel: EIP: 0060:[] EFLAGS: 00010202 CPU: 0 > Sep 6 19:12:38 localhost kernel: EAX: 00000000 EBX: def22000 ECX: 00000000 EDX: 00000124 > Sep 6 19:12:38 localhost kernel: ESI: def2227c EDI: dee04000 EBP: 00000246 ESP: df4d7ce8 > Sep 6 19:12:38 localhost kernel: DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 > Sep 6 19:12:38 localhost kernel: CR0: 80050033 CR2: 00000246 CR3: 19b4d000 CR4: 00000690 > Sep 6 19:12:38 localhost kernel: Stack: > Sep 6 19:12:38 localhost kernel: dee8ba00 dee8ba00 dee8b400 dee04000 df4b6380 df4b63b8 00000001 dee04070 > Sep 6 19:12:38 localhost kernel: daca2ec0 dee8ba1c 00000040 00000010 00000000 def2200c def2227c 00000000 > Sep 6 19:12:38 localhost kernel: dee20800 00000000 df639c00 dcdc37e0 c01f4347 00000246 00000246 dcdc37e0 > Sep 6 19:12:38 localhost kernel: Call Trace: > Sep 6 19:12:38 localhost kernel: [] ? 0xc01f4347 Hi, your stack trace is broken. Did you fail to install the System.map file? Regards Oliver