Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.17 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.17-rc7 ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1773906 Title: Upgraded artful kernel oopses with null pointer dereference on pkt_setup_dev on insertion of mobile usb stick Status in linux package in Ubuntu: Incomplete Bug description: On insertion of a Huawei E173 mobile internet USB stick the artful kernel now oopses: BUG: unable to handle kernel NULL pointer dereference at 00000000000003d0 [ 633.710837] IP: pkt_setup_dev+0x2af/0x650 [pktcdvd] Issue seems to be related to the setup of the cdrom-like device hosted on the stick together with the UMTS modem. May possibly be due to some race as the usb stick configuration keeps changing until the device is properly switched to operate as a modem. Some of the times, UMTS modem remains detected notwithstanding the issue. After the issue, the system has problems in shutting down, though. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: linux-image-generic 4.13.0.43.46 ProcVersionSignature: Ubuntu 4.13.0-43.48-generic 4.13.16 Uname: Linux 4.13.0-43-generic x86_64 ApportVersion: 2.20.7-0ubuntu3.8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: callegar 2654 F.... pulseaudio /dev/snd/controlC1: callegar 2654 F.... pulseaudio CurrentDesktop: KDE Date: Tue May 29 08:27:52 2018 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=c7dd5aac-abad-4cd0-9cac-552d49960853 InstallationDate: Installed on 2013-12-12 (1628 days ago) InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MachineType: Notebook W740SU ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-43-generic root=/dev/mapper/zagar_ssd--vg-root ro quiet splash resume=/dev/zagar_ssd-vg/swap_1 acpi_backlight=vendor vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.13.0-43-generic N/A linux-backports-modules-4.13.0-43-generic N/A linux-firmware 1.169.3 SourcePackage: linux UpgradeStatus: Upgraded to artful on 2017-10-26 (214 days ago) dmi.bios.date: 10/02/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 4.6.5 dmi.board.asset.tag: Tag 12345 dmi.board.name: W740SU dmi.board.vendor: Notebook dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Notebook dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd10/02/2013:svnNotebook:pnW740SU:pvrNotApplicable:rvnNotebook:rnW740SU:rvrNotApplicable:cvnNotebook:ct9:cvrN/A: dmi.product.family: Not Applicable dmi.product.name: W740SU dmi.product.version: Not Applicable dmi.sys.vendor: Notebook To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1773906/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
