Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.6 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/v4.6-rc4-wily/ ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** 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/1567781 Title: unable to handle kernel NULL pointer dereference at 00000134 Status in linux package in Ubuntu: Incomplete Bug description: Problem is found in dmesg output: [ 11.660671] BUG: unable to handle kernel NULL pointer dereference at 00000134 [ 11.660688] IP: [<c17692b2>] mutex_lock+0x12/0x30 [ 11.660706] *pdpt = 0000000033ee5001 *pde = 0000000000000000 [ 11.660714] Oops: 0002 [#1] SMP [ 11.660723] Modules linked in: nfsd auth_rpcgss nfs_acl lockd parport_pc grace ppdev lp sunrpc parport autofs4 hid_generic hid_cherry pata_acpi usbhid hid psmouse gma500_gfx i2c_algo_bit r8169 drm_kms_helper drm sdhci_pci pata_sch sdhci mii video [ 11.660772] CPU: 1 PID: 242 Comm: plymouthd Not tainted 4.2.0-35-generic #40-Ubuntu [ 11.660779] Hardware name: CompuLab CM-iAM/SBC-FITPC2i/CM-iAM/SBC-FITPC2i, BIOS NAPA0001.86C.0000.D.1009141059 09/14/2010 [ 11.660785] task: f5cf08c0 ti: f2364000 task.ti: f2364000 [ 11.660792] EIP: 0060:[<c17692b2>] EFLAGS: 00010286 CPU: 1 [ 11.660798] EIP is at mutex_lock+0x12/0x30 [ 11.660804] EAX: 00000134 EBX: 00000134 ECX: 00000000 EDX: 80000000 [ 11.660810] ESI: 00000000 EDI: 00000000 EBP: f2365ea8 ESP: f2365ea4 [ 11.660815] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 11.660820] CR0: 80050033 CR2: 00000134 CR3: 31a1d540 CR4: 000006f0 [ 11.660824] Stack: [ 11.660828] f19f93a0 f2365ec0 f8586171 f326dea0 f1ad7000 00000000 f1a0a400 f2365ec8 [ 11.660842] f858621f f2365edc f845ff47 f1a0a400 f1a0a400 f1a0a400 f2365eec f84b6019 [ 11.660856] f2365f04 c11b2de4 f2365f04 f856a78a f74d59d0 00000000 00000000 f1a0a400 [ 11.660869] Call Trace: [ 11.660935] [<f8586171>] __drm_modeset_lock_all+0x91/0x130 [drm] [ 11.660986] [<f858621f>] drm_modeset_lock_all+0xf/0x30 [drm] [ 11.661018] [<f845ff47>] drm_fb_helper_restore_fbdev_mode_unlocked+0x17/0x50 [drm_kms_helper] [ 11.661048] [<f84b6019>] psb_driver_lastclose+0x19/0x50 [gma500_gfx] [ 11.661060] [<c11b2de4>] ? kfree+0x134/0x140 [ 11.661110] [<f856a78a>] drm_lastclose+0x2a/0x140 [drm] [ 11.661159] [<f856ab3f>] drm_release+0x29f/0x490 [drm] [ 11.661170] [<c11cd0af>] __fput+0xcf/0x210 [ 11.661179] [<c11cd22d>] ____fput+0xd/0x10 [ 11.661189] [<c10869af>] task_work_run+0x7f/0xa0 [ 11.661200] [<c1012035>] do_notify_resume+0x75/0x80 [ 11.661209] [<c176bbcb>] work_notifysig+0x16/0x1b [ 11.661215] Code: 00 00 c3 8d b6 00 00 00 00 31 c0 5d c3 8d b6 00 00 00 00 8d bf 00 00 00 00 55 89 e5 53 3e 8d 74 26 00 89 c3 e8 60 ef ff ff 89 d8 <f0> ff 08 79 05 e8 74 07 00 00 64 a1 c8 c0 bf c1 89 43 10 5b 5d [ 11.661311] EIP: [<c17692b2>] mutex_lock+0x12/0x30 SS:ESP 0068:f2365ea4 [ 11.661323] CR2: 0000000000000134 [ 11.661332] ---[ end trace 3bb80835d39a3e44 ]--- ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-35-generic 4.2.0-35.40 ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5 Uname: Linux 4.2.0-35-generic i686 ApportVersion: 2.19.1-0ubuntu5 Architecture: i386 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D2c', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Fri Apr 8 08:21:26 2016 HibernationDevice: RESUME=UUID=fda9b258-61a9-4bc5-974e-738538cee628 InstallationDate: Installed on 2013-07-09 (1003 days ago) InstallationMedia: Lubuntu 13.04 "Raring Ringtail" - Release i386 (20130423.1) MachineType: CompuLab CM-iAM/SBC-FITPC2i ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-35-generic root=UUID=41b7698f-f3fa-4940-8e13-9378c5021e90 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.2.0-35-generic N/A linux-backports-modules-4.2.0-35-generic N/A linux-firmware 1.149.3 RfKill: 0: phy0: Wireless LAN Soft blocked: yes Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to wily on 2015-12-23 (106 days ago) dmi.bios.date: 09/14/2010 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: NAPA0001.86C.0000.D.1009141059 dmi.board.name: CM-iAM/SBC-FITPC2i dmi.board.vendor: Intel Corporation dmi.board.version: 1.x dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 1 dmi.chassis.vendor: OEM dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrNAPA0001.86C.0000.D.1009141059:bd09/14/2010:svnCompuLab:pnCM-iAM/SBC-FITPC2i:pvrNotApplicable:rvnIntelCorporation:rnCM-iAM/SBC-FITPC2i:rvr1.x:cvnOEM:ct1:cvrN/A: dmi.product.name: CM-iAM/SBC-FITPC2i dmi.product.version: Not Applicable dmi.sys.vendor: CompuLab To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1567781/+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
