Public bug reported:
Ubuntu 16.04 keeps freezing, i.e. becoming completely unresponsive,
sporadically (e.g. ~once a day).
I can see "unable to handle kernel NULL" pointer dereference. The
repeated appearance of "i915" makes me think it might be related to my
graphics card, but I'm well outside my comfort zone.
Apologies if I have not provided sufficient info. I'm new to Linux and
Ubuntu. This keeps happening so I can take extra steps next time if
necess.
/var/log/syslog contains:
grep -a "Aug 14 19:40" /data/2017-08-14.Ubuntu.Syslog
Aug 14 19:40:00 neil-notebook pulseaudio[2208]: [pulseaudio] shm.c: shm_open()
failed: No such file or directory
Aug 14 19:40:59 neil-notebook kernel: [69057.319465] BUG: unable to handle
kernel NULL pointer dereference at 0000000000000018
Aug 14 19:40:59 neil-notebook kernel: [69057.320393] IP:
gen8_ppgtt_alloc_page_directories.isra.38+0x124/0x270 [i915]
Aug 14 19:40:59 neil-notebook kernel: [69057.321301] PGD 0
Aug 14 19:40:59 neil-notebook kernel: [69057.321302]
Aug 14 19:40:59 neil-notebook kernel: [69057.323052] Oops: 0002 [#1] SMP
Aug 14 19:40:59 neil-notebook kernel: [69057.323928] Modules linked in:
nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype br_netfilter
xt_CHECKSUM iptable_mangle aufs ipt_MASQUERADE nf_nat_masquerade_ipv4
iptable_nat nf_nat_ipv4 nf_nat libcrc32c nf_conntrack_ipv4 nf_defrag_ipv4
xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 ccm xt_tcpudp bridge stp
llc ebtable_filter ebtables rfcomm ip6table_filter ip6_tables iptable_filter
ip_tables x_tables bnep snd_hda_codec_hdmi nls_iso8859_1 hp_wmi sparse_keymap
intel_rapl x86_pkg_temp_thermal arc4 intel_powerclamp coretemp crct10dif_pclmul
crc32_pclmul ghash_clmulni_intel pcbc aesni_intel iwlmvm aes_x86_64 crypto_simd
glue_helper mac80211 cryptd snd_soc_rt298 intel_cstate intel_rapl_perf
snd_soc_rt286 snd_soc_ssm4567 snd_soc_rl6347a joydev uvcvideo input_leds
snd_soc_core serio_raw
Aug 14 19:40:59 neil-notebook kernel: [69057.329492] videobuf2_vmalloc
snd_compress videobuf2_memops videobuf2_v4l2 ac97_bus snd_hda_codec_realtek
videobuf2_core snd_pcm_dmaengine iwlwifi intel_pch_thermal
snd_hda_codec_generic videodev media snd_seq_midi snd_seq_midi_event btusb
btrtl btbcm snd_rawmidi snd_hda_intel btintel cfg80211 bluetooth snd_hda_codec
lpc_ich snd_hda_core snd_hwdep snd_seq snd_pcm mei_me snd_seq_device mei shpchp
processor_thermal_device intel_soc_dts_iosf snd_timer snd snd_soc_sst_acpi
dw_dmac snd_soc_sst_match int3403_thermal soundcore int3402_thermal
int3400_thermal i2c_designware_platform mac_hid acpi_thermal_rel
i2c_designware_core int340x_thermal_zone spi_pxa2xx_platform hp_wireless
int3406_thermal 8250_dw tpm_crb dw_dmac_core acpi_pad kvm irqbypass parport_pc
ppdev lp parport autofs4 i915 i2c_algo_bit drm_kms_helper
Aug 14 19:40:59 neil-notebook kernel: [69057.335797] psmouse syscopyarea
sysfillrect sysimgblt fb_sys_fops ahci r8169 drm libahci mii wmi sdhci_acpi
sdhci i2c_hid hid video fjes
Aug 14 19:40:59 neil-notebook kernel: [69057.336962] CPU: 3 PID: 3118 Comm:
chrome Tainted: G W 4.10.0-32-generic #36~16.04.1-Ubuntu
Aug 14 19:40:59 neil-notebook kernel: [69057.338158] Hardware name: HP HP 250
G5 Notebook PC/81EF, BIOS F.18 09/26/2016
Aug 14 19:40:59 neil-notebook kernel: [69057.339348] task: ffff9031ebc45a00
task.stack: ffffa10943184000
Aug 14 19:40:59 neil-notebook kernel: [69057.340550] RIP:
0010:gen8_ppgtt_alloc_page_directories.isra.38+0x124/0x270 [i915]
Aug 14 19:40:59 neil-notebook kernel: [69057.341795] RSP: 0018:ffffa10943187878
EFLAGS: 00010246
Aug 14 19:40:59 neil-notebook kernel: [69057.343054] RAX: ffff90324a8aa680 RBX:
0000000000000003 RCX: 0000000000000003
Aug 14 19:40:59 neil-notebook kernel: [69057.344232] RDX: 0000000000000000 RSI:
ffff9031702f4000 RDI: ffff90324c7d0000
Aug 14 19:40:59 neil-notebook kernel: [69057.345441] RBP: ffffa109431878d8 R08:
0000000000000018 R09: 0000000000000000
Aug 14 19:40:59 neil-notebook kernel: [69057.346545] R10: 0000000000000000 R11:
ffffee52056ad0e0 R12: ffff9031e40a2000
Aug 14 19:40:59 neil-notebook kernel: [69057.347708] R13: ffff903057eaebf0 R14:
00000000fff2f000 R15: 0000000000008000
Aug 14 19:40:59 neil-notebook kernel: [69057.348878] FS:
00007f43a32cba80(0000) GS:ffff90325ed80000(0000) knlGS:0000000000000000
Aug 14 19:40:59 neil-notebook kernel: [69057.350025] CS: 0010 DS: 0000 ES:
0000 CR0: 0000000080050033
Aug 14 19:40:59 neil-notebook kernel: [69057.351413] CR2: 0000000000000018 CR3:
00000001f1f48000 CR4: 00000000003406e0
Aug 14 19:40:59 neil-notebook kernel: [69057.352574] Call Trace:
Aug 14 19:40:59 neil-notebook kernel: [69057.353852]
gen8_alloc_va_range_3lvl+0xf3/0x9b0 [i915]
Aug 14 19:40:59 neil-notebook kernel: [69057.355080] ?
set_next_entity+0xc3/0x1b0
Aug 14 19:40:59 neil-notebook kernel: [69057.356390]
gen8_alloc_va_range+0x23e/0x490 [i915]
Aug 14 19:40:59 neil-notebook kernel: [69057.358626] i915_vma_bind+0x6a/0x170
[i915]
Aug 14 19:40:59 neil-notebook kernel: [69057.360573]
__i915_vma_do_pin+0x2a5/0x450 [i915]
Aug 14 19:40:59 neil-notebook kernel: [69057.361779]
i915_gem_execbuffer_reserve_vma.isra.31+0x144/0x1b0 [i915]
Aug 14 19:40:59 neil-notebook kernel: [69057.363047]
i915_gem_execbuffer_reserve.isra.32+0x388/0x3b0 [i915]
Aug 14 19:40:59 neil-notebook kernel: [69057.364319]
i915_gem_do_execbuffer.isra.38+0x4f7/0x1570 [i915]
Aug 14 19:40:59 neil-notebook kernel: [69057.365579] ? krealloc+0x79/0xc0
Aug 14 19:40:59 neil-notebook kernel: [69057.366806] ?
radix_tree_lookup_slot+0x22/0x50
Aug 14 19:40:59 neil-notebook kernel: [69057.368234] ?
find_get_entry+0x20/0x110
Aug 14 19:40:59 neil-notebook kernel: [69057.369528] ?
shmem_getpage_gfp+0xf6/0xc00
Aug 14 19:40:59 neil-notebook kernel: [69057.371010] ?
i915_gem_object_wait_reservation+0x18f/0x1e0 [i915]
Aug 14 19:40:59 neil-notebook kernel: [69057.372482]
i915_gem_execbuffer2+0xa2/0x1e0 [i915]
Aug 14 19:40:59 neil-notebook kernel: [69057.373952] drm_ioctl+0x21b/0x4d0
[drm]
Aug 14 19:40:59 neil-notebook kernel: [69057.375484] ?
i915_gem_execbuffer+0x310/0x310 [i915]
Aug 14 19:40:59 neil-notebook kernel: [69057.377091] ?
__seccomp_filter+0x67/0x250
Aug 14 19:40:59 neil-notebook kernel: [69057.378592] ? new_sync_read+0xd0/0x120
Aug 14 19:40:59 neil-notebook kernel: [69057.380086] do_vfs_ioctl+0xa1/0x5f0
Aug 14 19:40:59 neil-notebook kernel: [69057.381551] ?
__secure_computing+0x3b/0xd0
Aug 14 19:40:59 neil-notebook kernel: [69057.383019] ?
syscall_trace_enter+0xcd/0x2f0
Aug 14 19:40:59 neil-notebook kernel: [69057.384585] SyS_ioctl+0x79/0x90
Aug 14 19:40:59 neil-notebook kernel: [69057.386053] do_syscall_64+0x5b/0xc0
Aug 14 19:40:59 neil-notebook kernel: [69057.387481]
entry_SYSCALL64_slow_path+0x25/0x25
Aug 14 19:40:59 neil-notebook kernel: [69057.388865] RIP: 0033:0x7f439c933f07
Aug 14 19:40:59 neil-notebook kernel: [69057.390377] RSP: 002b:00007fffde871cd8
EFLAGS: 00000246 ORIG_RAX: 0000000000000010
Aug 14 19:40:59 neil-notebook kernel: [69057.391764] RAX: ffffffffffffffda RBX:
000021d44cdd0000 RCX: 00007f439c933f07
Aug 14 19:40:59 neil-notebook kernel: [69057.393024] RDX: 00007fffde871d30 RSI:
00000000c0406469 RDI: 000000000000000f
Aug 14 19:40:59 neil-notebook kernel: [69057.394250] RBP: 00007fffde871d30 R08:
0000000000000000 R09: 0000000000000000
Aug 14 19:40:59 neil-notebook kernel: [69057.395434] R10: 0000000000000038 R11:
0000000000000246 R12: 00000000c0406469
Aug 14 19:40:59 neil-notebook kernel: [69057.396545] R13: 000000000000000f R14:
000021d4504bed80 R15: 0000000000000000
Aug 14 19:40:59 neil-notebook kernel: [69057.397615] Code: 20 03 00 00 48 8b b8
d8 02 00 00 48 8b 52 08 48 83 ca 03 e8 1f cd ff ff 48 8b 45 a8 4c 8b 45 c8 48
8b 4d c0 48 8b 10 48 8b 45 d0 <4e> 89 24 02 48 0f ab 08 0f 1f 44 00 00 e9 44 ff
ff ff 81 fb 00
Aug 14 19:40:59 neil-notebook kernel: [69057.399869] RIP:
gen8_ppgtt_alloc_page_directories.isra.38+0x124/0x270 [i915] RSP:
ffffa10943187878
Aug 14 19:40:59 neil-notebook kernel: [69057.401026] CR2: 0000000000000018
Aug 14 19:40:59 neil-notebook kernel: [69057.407983] ---[ end trace
f4f7dc681ff29139 ]---
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.10.0-32-generic 4.10.0-32.36~16.04.1
ProcVersionSignature: Ubuntu 4.10.0-32.36~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-32-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Aug 14 20:40:21 2017
InstallationDate: Installed on 2017-04-10 (125 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64
(20170215.2)
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-hwe (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
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https://bugs.launchpad.net/bugs/1710706
Title:
system freeze: unable to handle kernel NULL pointer dereference
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