I just had this happen to me. I'll attach the relevant part of the syslog. If there's any more info that I could give that would help just let me know. Using Kernel 5.3.0-10-generic from Eoan.
Oct 5 18:02:26 kernel: [493310.092229] BUG: kernel NULL pointer dereference, address: 00000000000002ac Oct 5 18:02:26 kernel: [493310.092235] #PF: supervisor read access in kernel mode Oct 5 18:02:26 kernel: [493310.092237] #PF: error_code(0x0000) - not-present page Oct 5 18:02:26 kernel: [493310.092239] PGD 0 P4D 0 Oct 5 18:02:26 kernel: [493310.092244] Oops: 0000 [#1] SMP NOPTI Oct 5 18:02:26 kernel: [493310.092248] CPU: 0 PID: 2063 Comm: kworker/u32:3 Not tainted 5.3.0-10-generic #11-Ubuntu Oct 5 18:02:26 kernel: [493310.092250] Hardware name: Micro-Star International Co., Ltd MS-7C02/B450 TOMAHAWK (MS-7C02), BIOS 1.50 01/25/2019 Oct 5 18:02:26 kernel: [493310.092266] Workqueue: events_unbound commit_work [drm_kms_helper] Oct 5 18:02:26 kernel: [493310.092409] RIP: 0010:dc_stream_log+0x12/0xc0 [amdgpu] Oct 5 18:02:26 kernel: [493310.092414] Code: 83 f1 01 0f b6 c9 e8 8d 92 35 d3 e9 71 ff ff ff 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 f2 bf 04 00 00 00 48 89 e5 53 <8b> 86 ac 02 00 00 48 89 f3 8b 8e 0c 01 00 00 50 8b 86 28 01 00 00 Oct 5 18:02:26 kernel: [493310.092418] RSP: 0018:ffffb81e08617b80 EFLAGS: 00010202 Oct 5 18:02:26 kernel: [493310.092422] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000002 Oct 5 18:02:26 kernel: [493310.092424] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 Oct 5 18:02:26 kernel: [493310.092427] RBP: ffffb81e08617b88 R08: 0000000000000000 R09: 0000000000000001 Oct 5 18:02:26 kernel: [493310.092430] R10: ffff9c49fea173c8 R11: 0000000000000000 R12: ffff9c43047a0000 Oct 5 18:02:26 kernel: [493310.092432] R13: ffff9c49f2e00000 R14: ffff9c43047a0000 R15: ffff9c49e90c0000 Oct 5 18:02:26 kernel: [493310.092436] FS: 0000000000000000(0000) GS:ffff9c49fea00000(0000) knlGS:0000000000000000 Oct 5 18:02:26 kernel: [493310.092439] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Oct 5 18:02:26 kernel: [493310.092441] CR2: 00000000000002ac CR3: 00000007ecba0000 CR4: 00000000003406f0 Oct 5 18:02:26 kernel: [493310.092445] DR0: 000000001004c7c0 DR1: 0000000010183c60 DR2: 00000000100f14a0 Oct 5 18:02:26 kernel: [493310.092447] DR3: 00000000100efd10 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Oct 5 18:02:26 kernel: [493310.092449] Call Trace: Oct 5 18:02:26 kernel: [493310.092611] dc_commit_state+0x7e/0xb0 [amdgpu] Oct 5 18:02:26 kernel: [493310.092745] amdgpu_dm_atomic_commit_tail+0x3bf/0xfb0 [amdgpu] Oct 5 18:02:26 kernel: [493310.092753] ? cpumask_next_and+0x1e/0x20 Oct 5 18:02:26 kernel: [493310.092759] ? free_one_page+0xb7/0x4b0 Oct 5 18:02:26 kernel: [493310.092764] ? __switch_to_asm+0x40/0x70 Oct 5 18:02:26 kernel: [493310.092767] ? __switch_to_asm+0x34/0x70 Oct 5 18:02:26 kernel: [493310.092770] ? __switch_to_asm+0x40/0x70 Oct 5 18:02:26 kernel: [493310.092773] ? __switch_to_asm+0x34/0x70 Oct 5 18:02:26 kernel: [493310.092776] ? __switch_to_asm+0x40/0x70 Oct 5 18:02:26 kernel: [493310.092779] ? __switch_to_asm+0x34/0x70 Oct 5 18:02:26 kernel: [493310.092782] ? __switch_to_asm+0x40/0x70 Oct 5 18:02:26 kernel: [493310.092785] ? __switch_to_asm+0x34/0x70 Oct 5 18:02:26 kernel: [493310.092788] ? __switch_to_asm+0x40/0x70 Oct 5 18:02:26 kernel: [493310.092791] ? __switch_to_asm+0x34/0x70 Oct 5 18:02:26 kernel: [493310.092794] ? __switch_to_asm+0x40/0x70 Oct 5 18:02:26 kernel: [493310.092797] ? __switch_to_asm+0x34/0x70 Oct 5 18:02:26 kernel: [493310.092801] ? select_idle_sibling+0x1f/0x70 Oct 5 18:02:26 kernel: [493310.092804] ? select_task_rq_fair+0x379/0x5c0 Oct 5 18:02:26 kernel: [493310.092807] ? _cond_resched+0x19/0x30 Oct 5 18:02:26 kernel: [493310.092810] ? wait_for_completion_timeout+0x3a/0x120 Oct 5 18:02:26 kernel: [493310.092824] commit_tail+0x41/0x70 [drm_kms_helper] Oct 5 18:02:26 kernel: [493310.092836] ? commit_tail+0x41/0x70 [drm_kms_helper] Oct 5 18:02:26 kernel: [493310.092848] commit_work+0x12/0x20 [drm_kms_helper] Oct 5 18:02:26 kernel: [493310.092852] process_one_work+0x1db/0x380 Oct 5 18:02:26 kernel: [493310.092855] worker_thread+0x4d/0x400 Oct 5 18:02:26 kernel: [493310.092860] kthread+0x104/0x140 Oct 5 18:02:26 kernel: [493310.092863] ? process_one_work+0x380/0x380 Oct 5 18:02:26 kernel: [493310.092866] ? kthread_park+0x80/0x80 Oct 5 18:02:26 kernel: [493310.092870] ret_from_fork+0x22/0x40 Oct 5 18:02:26 kernel: [493310.092873] Modules linked in: ppp_mppe ppp_async nf_conntrack_pptp nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c snd_seq_dummy ccm binfmt_misc edac_mce_amd kvm_amd snd_hda_codec_realtek snd_hda_codec_generic kvm ledtrig_audio irqbypass snd_hda_codec_hdmi snd_hda_intel snd_usb_audio snd_hda_codec snd_usbmidi_lib snd_hda_core mc snd_hwdep snd_pcm ath9k_htc ath9k_common snd_seq_midi crct10dif_pclmul amdgpu ath9k_hw snd_seq_midi_event snd_rawmidi crc32_pclmul ath amd_iommu_v2 gpu_sched mac80211 ghash_clmulni_intel snd_seq ttm snd_seq_device drm_kms_helper snd_timer drm aesni_intel snd cfg80211 i2c_algo_bit aes_x86_64 fb_sys_fops syscopyarea crypto_simd sysfillrect sysimgblt libarc4 ccp serio_raw wmi_bmof cryptd joydev glue_helper soundcore input_leds k10temp mac_hid sch_fq_codel nct6775 hwmon_vid parport_pc ppdev lp parport ip_tables x_tables autofs4 uas usb_storage hid_generic usbhid hid i2c_piix4 r8169 realtek ahci libahci wmi gpio_amdpt gpio_generic Oct 5 18:02:26 kernel: [493310.092927] CR2: 00000000000002ac Oct 5 18:02:26 kernel: [493310.092930] ---[ end trace dc5b51ddd231d2ed ]--- Oct 5 18:02:26 kernel: [493310.093055] RIP: 0010:dc_stream_log+0x12/0xc0 [amdgpu] Oct 5 18:02:26 kernel: [493310.093059] Code: 83 f1 01 0f b6 c9 e8 8d 92 35 d3 e9 71 ff ff ff 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 f2 bf 04 00 00 00 48 89 e5 53 <8b> 86 ac 02 00 00 48 89 f3 8b 8e 0c 01 00 00 50 8b 86 28 01 00 00 Oct 5 18:02:26 kernel: [493310.093061] RSP: 0018:ffffb81e08617b80 EFLAGS: 00010202 Oct 5 18:02:26 kernel: [493310.093063] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000002 Oct 5 18:02:26 kernel: [493310.093065] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 Oct 5 18:02:26 kernel: [493310.093066] RBP: ffffb81e08617b88 R08: 0000000000000000 R09: 0000000000000001 Oct 5 18:02:26 kernel: [493310.093068] R10: ffff9c49fea173c8 R11: 0000000000000000 R12: ffff9c43047a0000 Oct 5 18:02:26 kernel: [493310.093070] R13: ffff9c49f2e00000 R14: ffff9c43047a0000 R15: ffff9c49e90c0000 Oct 5 18:02:26 kernel: [493310.093072] FS: 0000000000000000(0000) GS:ffff9c49fea00000(0000) knlGS:0000000000000000 Oct 5 18:02:26 kernel: [493310.093074] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Oct 5 18:02:26 kernel: [493310.093076] CR2: 00000000000002ac CR3: 00000007ecba0000 CR4: 00000000003406f0 Oct 5 18:02:26 kernel: [493310.093078] DR0: 000000001004c7c0 DR1: 0000000010183c60 DR2: 00000000100f14a0 Oct 5 18:02:26 kernel: [493310.093080] DR3: 00000000100efd10 DR6: 00000000ffff0ff0 DR7: 0000000000000600 -- 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/1827822 Title: kernel null pointer dereference Status in linux package in Ubuntu: Confirmed Bug description: System started freezing up a couple days ago. After the latest one, I looked at the syslog file and found what appears to be a kernel bug report. May 5 18:06:03 corbin-goul kernel: [ 4650.769677] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 May 5 18:06:03 corbin-goul kernel: [ 4650.769694] IP: rm_hole+0x19/0x70 [drm] May 5 18:06:03 corbin-goul kernel: [ 4650.769696] PGD 0 P4D 0 May 5 18:06:03 corbin-goul kernel: [ 4650.769698] Oops: 0002 [#1] SMP PTI May 5 18:06:03 corbin-goul kernel: [ 4650.769700] Modules linked in: nls_iso8859_1 snd_hda_codec_realtek snd_hda_codec_hdmi intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_generic snd_hda_intel snd _hda_codec kvm snd_hda_core snd_hwdep snd_pcm irqbypass mei_me intel_cstate mei intel_rapl_perf snd_seq_midi input_leds snd_seq_midi_event serio_raw snd_rawmidi snd_seq snd_seq_device snd_timer lpc_ich snd shpchp soundcore mac_hid s ch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq a sync_xor async_tx xor raid6_pq libcrc32c raid0 multipath linear raid1 hid_generic usbhid hid crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc i915 May 5 18:06:03 corbin-goul kernel: [ 4650.769733] aesni_intel i2c_algo_bit aes_x86_64 crypto_simd drm_kms_helper glue_helper cryptd syscopyarea sysfillrect sysimgblt r8169 fb_sys_fops ahci mii drm libahci sata_inic162x video May 5 18:06:03 corbin-goul kernel: [ 4650.769743] CPU: 0 PID: 8713 Comm: kworker/0:0 Not tainted 4.15.0-48-generic #51-Ubuntu May 5 18:06:03 corbin-goul kernel: [ 4650.769744] Hardware name: Gigabyte Technology Co., Ltd. H87M-D3H/H87M-D3H, BIOS F3 04/24/2013 May 5 18:06:03 corbin-goul kernel: [ 4650.769770] Workqueue: events __i915_gem_free_work [i915] May 5 18:06:03 corbin-goul kernel: [ 4650.769778] RIP: 0010:rm_hole+0x19/0x70 [drm] May 5 18:06:03 corbin-goul kernel: [ 4650.769779] RSP: 0018:ffff95fb81f2bd20 EFLAGS: 00010202 May 5 18:06:03 corbin-goul kernel: [ 4650.769780] RAX: 0000000000000000 RBX: ffff89d51f1382c0 RCX: 0000000000000000 May 5 18:06:03 corbin-goul kernel: [ 4650.769781] RDX: 0000000000000000 RSI: ffff89d765cf8b40 RDI: ffff89d51f138318 May 5 18:06:03 corbin-goul kernel: [ 4650.769782] RBP: ffff95fb81f2bd28 R08: ffff89d5e7b71bc0 R09: 0000000000000000 May 5 18:06:03 corbin-goul kernel: [ 4650.769783] R10: ffff95fb81f2bde0 R11: 0000000000000001 R12: ffff89d765cf8b00 May 5 18:06:03 corbin-goul kernel: [ 4650.769784] R13: 0000000000000000 R14: ffff89d51f1382e0 R15: ffff89d75f6c37c8 May 5 18:06:03 corbin-goul kernel: [ 4650.769786] FS: 0000000000000000(0000) GS:ffff89d77e200000(0000) knlGS:0000000000000000 May 5 18:06:03 corbin-goul kernel: [ 4650.769787] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 May 5 18:06:03 corbin-goul kernel: [ 4650.769788] CR2: 0000000000000008 CR3: 00000002eac0a002 CR4: 00000000001606f0 May 5 18:06:03 corbin-goul kernel: [ 4650.769789] Call Trace: May 5 18:06:03 corbin-goul kernel: [ 4650.769797] drm_mm_remove_node+0x29d/0x360 [drm] May 5 18:06:03 corbin-goul kernel: [ 4650.769801] ? __internal_add_timer+0x1f/0x60 May 5 18:06:03 corbin-goul kernel: [ 4650.769816] i915_vma_remove+0x3a/0x100 [i915] May 5 18:06:03 corbin-goul kernel: [ 4650.769830] i915_vma_unbind+0x1cd/0x370 [i915] May 5 18:06:03 corbin-goul kernel: [ 4650.769843] i915_vma_close+0x7d/0xa0 [i915] May 5 18:06:03 corbin-goul kernel: [ 4650.769856] __i915_gem_free_objects+0xa3/0x2c0 [i915] May 5 18:06:03 corbin-goul kernel: [ 4650.769867] __i915_gem_free_work+0x60/0x90 [i915] May 5 18:06:03 corbin-goul kernel: [ 4650.769870] process_one_work+0x1de/0x410 May 5 18:06:03 corbin-goul kernel: [ 4650.769872] worker_thread+0x32/0x410 May 5 18:06:03 corbin-goul kernel: [ 4650.769874] kthread+0x121/0x140 May 5 18:06:03 corbin-goul kernel: [ 4650.769876] ? process_one_work+0x410/0x410 May 5 18:06:03 corbin-goul kernel: [ 4650.769878] ? kthread_create_worker_on_cpu+0x70/0x70 May 5 18:06:03 corbin-goul kernel: [ 4650.769881] ret_from_fork+0x35/0x40 May 5 18:06:03 corbin-goul kernel: [ 4650.769882] Code: 00 00 00 45 31 d2 eb bb 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 53 48 8b 57 30 48 8b 47 38 48 89 fb 48 8d 7f 58 <48> 89 42 08 48 89 10 48 b8 00 01 00 00 00 00 ad de 48 89 47 d8 May 5 18:06:03 corbin-goul kernel: [ 4650.769909] RIP: rm_hole+0x19/0x70 [drm] RSP: ffff95fb81f2bd20 May 5 18:06:03 corbin-goul kernel: [ 4650.769910] CR2: 0000000000000008 May 5 18:06:03 corbin-goul kernel: [ 4650.769912] ---[ end trace 4488bf4278af9827 ]--- ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-48-generic 4.15.0-48.51 ProcVersionSignature: Ubuntu 4.15.0-48.51-generic 4.15.18 Uname: Linux 4.15.0-48-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ken 2604 F.... pulseaudio /dev/snd/controlC1: ken 2604 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Sun May 5 18:18:41 2019 HibernationDevice: RESUME=UUID=d9769aee-0f6e-4d98-8376-a6ba3aa6edf8 InstallationDate: Installed on 2018-10-18 (199 days ago) InstallationMedia: Ubuntu-Server 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) IwConfig: lo no wireless extensions. enp2s0 no wireless extensions. MachineType: Gigabyte Technology Co., Ltd. H87M-D3H ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-48-generic root=/dev/mapper/system-Ubuntu--18.04.1 ro RelatedPackageVersions: linux-restricted-modules-4.15.0-48-generic N/A linux-backports-modules-4.15.0-48-generic N/A linux-firmware 1.173.5 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/24/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F3 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: H87M-D3H dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF3:bd04/24/2013:svnGigabyteTechnologyCo.,Ltd.:pnH87M-D3H:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnH87M-D3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To be filled by O.E.M. dmi.product.name: H87M-D3H dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: Gigabyte Technology Co., Ltd. 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