[ 85.948511] netpoll: netconsole: local port 6665 [ 85.948610] netpoll: netconsole: local IPv4 address 0.0.0.0 [ 85.948680] netpoll: netconsole: interface 'eno1' [ 85.948725] netpoll: netconsole: remote port 6666 [ 85.948771] netpoll: netconsole: remote IPv4 address 10.239.156.94 [ 85.948834] netpoll: netconsole: remote ethernet address 74:d0:2b:95:69:65 [ 85.948902] netpoll: netconsole: local IP 10.239.156.121 [ 85.948983] console [netcon0] enabled [ 85.949014] netconsole: network logging started [ 85.951515] console [netcon0] disabled [ 85.954311] netpoll: netconsole: local IP 10.239.156.121 [ 85.954383] console [netcon0] enabled [ 85.954423] netconsole: network logging started [ 168.665197] gem_userptr_blits: executing [ 168.665407] [drm:i915_gem_open] [ 168.665640] [drm:i915_gem_open] [ 168.666424] gem_userptr_blits: starting subtest create-destroy-sync [ 168.668910] BUG: unable to handle kernel NULL pointer dereference at 0000000c [ 168.669050] IP: [] mmu_notifier_unregister+0x10/0x97 [ 168.669163] *pde = 00000000 [ 168.669224] Oops: 0000 [#1] SMP [ 168.669299] Modules linked in: netconsole configfs ip6table_filter ip6_tables ebtable_nat ebtables nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc ipv6 dm_mod snd_hda_codec_hdmi b43 mac80211 cfg80211 rfkill iTCO_wdt iTCO_vendor_support ppdev snd_hda_codec_idt snd_hda_codec_generic dcdbas pcspkr i2c_i801 snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm firewire_ohci lpc_ich mfd_core firewire_core snd_timer crc_itu_t snd bcma soundcore wmi battery parport_pc parport tpm_tis tpm ac acpi_cpufreq joydev i915 button video drm_kms_helper drm cfbfillrect cfbimgblt cfbcopyarea [last unloaded: netconsole] [ 168.670837] CPU: 2 PID: 3547 Comm: kworker/2:2 Not tainted 3.17.0_drm-intel-fixes_bfe01a_20141009+ #310 [ 168.670984] Hardware name: Dell Inc. Latitude E6510/0JKDHD, BIOS A05 08/10/2010 [ 168.671134] Workqueue: events __i915_mm_struct_free__worker [i915] [ 168.671243] task: f58a9400 ti: c0076000 task.ti: c0076000 [ 168.671332] EIP: 0060:[] EFLAGS: 00010206 CPU: 2 [ 168.675325] EIP is at mmu_notifier_unregister+0x10/0x97 [ 168.679307] EAX: 00000003 EBX: f580a140 ECX: f682ab54 EDX: f580a140 [ 168.683307] ESI: 00000008 EDI: f5b37f00 EBP: 00000000 ESP: c0077f18 [ 168.687280] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [ 168.691237] CR0: 8005003b CR2: 0000000c CR3: 01fac000 CR4: 000007d0 [ 168.695202] Stack: [ 168.699116] f5b37f18 fffffffc f5b37f00 f8573d3d f59412a0 f5b37f18 f682ab40 c103fbdd [ 168.703205] c103007b 00000000 f682bd00 f59412a0 f682ab40 f59412b8 f682ab54 c103ff53 [ 168.707290] 00000008 f58a9400 f58a9400 c23cdd60 f59412a0 c103fd42 c0076000 c1042b1b [ 168.711399] Call Trace: [ 168.715426] [] ? __i915_mm_struct_free__worker+0x1a/0x3b [i915] [ 168.719533] [] ? process_one_work+0x163/0x2ab [ 168.723661] [] ? copy_process.part.39+0x80b/0x12ec [ 168.727814] [] ? worker_thread+0x211/0x2f4 [ 168.731984] [] ? process_scheduled_works+0x1d/0x1d [ 168.736166] [] ? kthread+0xa1/0xa6 [ 168.740340] [] ? ret_from_kernel_thread+0x21/0x30 [ 168.744516] [] ? kthread_freezable_should_stop+0x3b/0x3b [ 168.748720] Code: 5f 8b 1b 85 db 75 e4 8b 14 24 83 c4 08 b8 20 98 f9 c2 5b 5e 5f 5d e9 df 6c f8 ff 57 56 89 c6 53 8b 42 28 89 d3 85 c0 7f 02 0f 0b <83> 7e 04 00 74 58 b8 20 98 f9 c2 e8 98 6c f8 ff 89 c7 8b 46 08 [ 168.758209] EIP: [] mmu_notifier_unregister+0x10/0x97 SS:ESP 0068:c0077f18 [ 168.762785] CR2: 000000000000000c [ 168.767349] ---[ end trace 6620fa4b34e3f6ac ]--- [ 168.772001] BUG: unable to handle kernel paging request at ffffffec [ 168.774807] IP: [] kthread_data+0x6/0xa [ 168.777614] *pde = 02f5f067 *pte = 00000000 [ 168.780421] Oops: 0000 [#2] SMP [ 168.783203] Modules linked in: netconsole configfs ip6table_filter ip6_tables ebtable_nat ebtables nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc ipv6 dm_mod snd_hda_codec_hdmi b43 mac80211 cfg80211 rfkill iTCO_wdt iTCO_vendor_support ppdev snd_hda_codec_idt snd_hda_codec_generic dcdbas pcspkr i2c_i801 snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm firewire_ohci lpc_ich mfd_core firewire_core snd_timer crc_itu_t snd bcma soundcore wmi battery parport_pc parport tpm_tis tpm