[Bug 100725] [i915] oops in intel_update_cursor_plane(): "BUG: unable to handle kernel NULL pointer dereference"

Sun Oct 29 15:12:12 UTC 2017

https://bugs.freedesktop.org/show_bug.cgi?id=100725

--- Comment #13 from Yotam Medini <yotam.medini at gmail.com> ---
It happens to me on (Linux Mint 18.2):

$ cat /proc/version 
Linux version 4.13.2-041302-generic (kernel at tangerine) (gcc version 7.2.0
(Ubuntu 7.2.0-3ubuntu1)) #201709132057 SMP Thu Sep 14 00:59:32 UTC 2017

/var/log/syslog has:

Oct 29 16:28:11 figini kernel: [445122.160964] [drm] GPU HANG: ecode
9:1:0xeeffefa1, in Xorg [1040], reason: Hang on bcs0, action: reset
Oct 29 16:28:11 figini kernel: [445122.160970] [drm] GPU hangs can indicate a
bug anywhere in the entire gfx stack, including userspace.
Oct 29 16:28:11 figini kernel: [445122.160972] [drm] Please file a _new_ bug
report on bugs.freedesktop.org against DRI -> DRM/Intel
Oct 29 16:28:11 figini kernel: [445122.160974] [drm] drm/i915 developers can
then reassign to the right component if it's not a kernel issue.
Oct 29 16:28:11 figini kernel: [445122.160975] [drm] The gpu crash dump is
required to analyze gpu hangs, so please always attach it.
Oct 29 16:28:11 figini kernel: [445122.160978] [drm] GPU crash dump saved to
/sys/class/drm/card0/error
Oct 29 16:28:11 figini kernel: [445122.161194] drm/i915: Resetting chip after
gpu hang
Oct 29 16:28:11 figini kernel: [445122.164497] BUG: unable to handle kernel
NULL pointer dereference at 0000000000000070
Oct 29 16:28:11 figini kernel: [445122.164614] IP: reset_common_ring+0x9a/0x100
[i915]
Oct 29 16:28:11 figini kernel: [445122.164641] PGD 0 
Oct 29 16:28:11 figini kernel: [445122.164642] P4D 0 
Oct 29 16:28:11 figini kernel: [445122.164654] 
Oct 29 16:28:11 figini kernel: [445122.164677] Oops: 0000 [#1] SMP
Oct 29 16:28:11 figini kernel: [445122.164696] Modules linked in: rfcomm ccm
bnep binfmt_misc intel_rapl intel_telemetry_pltdrv intel_punit_ipc
intel_telemetry_core intel_pmc_ipc x86_pkg_temp_thermal intel_powerclamp
coretemp kvm irqbypass snd_soc_skl snd_soc_skl_ipc crct10dif_pclmul
crc32_pclmul ghash_clmulni_intel pcbc aesni_intel snd_soc_sst_ipc
snd_hda_codec_hdmi snd_hda_codec_generic snd_soc_sst_dsp aes_x86_64 uvcvideo
snd_hda_ext_core videobuf2_vmalloc videobuf2_memops videobuf2_v4l2
snd_soc_sst_match videobuf2_core videodev snd_soc_core media snd_compress
ac97_bus snd_pcm_dmaengine crypto_simd btusb glue_helper cryptd snd_hda_intel
btrtl snd_hda_codec btbcm snd_hda_core intel_cstate btintel bluetooth snd_hwdep
intel_rapl_perf ecdh_generic snd_pcm joydev snd_seq_midi snd_seq_midi_event
intel_spi_platform intel_spi spi_nor mtd
Oct 29 16:28:11 figini kernel: [445122.165170]  snd_rawmidi arc4 idma64 iwlmvm
mac80211 snd_seq snd_seq_device snd_timer snd iwlwifi virt_dma soundcore
intel_lpss_pci cfg80211 wmi_bmof intel_lpss lpc_ich input_leds serio_raw
ideapad_laptop mac_hid elan_i2c mei_me tpm_crb mei shpchp sparse_keymap
parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq dm_mirror dm_region_hash
dm_log hid_generic usbhid i915 i2c_algo_bit drm_kms_helper syscopyarea
sysfillrect sysimgblt fb_sys_fops drm r8169 ahci mii libahci i2c_hid wmi hid
video pinctrl_broxton pinctrl_intel
Oct 29 16:28:11 figini kernel: [445122.165465] CPU: 3 PID: 5344 Comm:
kworker/3:0 Not tainted 4.13.2-041302-generic #201709132057
Oct 29 16:28:11 figini kernel: [445122.165510] Hardware name: LENOVO
80XR/LNVNB161216, BIOS 5RCN20WW 05/22/2017
Oct 29 16:28:11 figini kernel: [445122.165582] Workqueue: events_long
i915_hangcheck_elapsed [i915]
Oct 29 16:28:11 figini kernel: [445122.165617] task: ffffa0956d0b8000
task.stack: ffffc1a981468000
Oct 29 16:28:11 figini kernel: [445122.165683] RIP:
0010:reset_common_ring+0x9a/0x100 [i915]
Oct 29 16:28:11 figini kernel: [445122.165712] RSP: 0000:ffffc1a98146bb58
EFLAGS: 00010246
Oct 29 16:28:11 figini kernel: [445122.165741] RAX: 0000000000003f00 RBX:
ffffa094b0ede1c0 RCX: 0000000000004000
Oct 29 16:28:11 figini kernel: [445122.165778] RDX: 0000000000003fff RSI:
ffffa095aebcf400 RDI: 0000000000000000
Oct 29 16:28:11 figini kernel: [445122.165819] RBP: ffffc1a98146bb70 R08:
ffffa095aebcf400 R09: ffffa095b16c0000
Oct 29 16:28:11 figini kernel: [445122.165857] R10: ffffc1a98146ba90 R11:
000000000000023c R12: ffffa095ba566000
Oct 29 16:28:11 figini kernel: [445122.165894] R13: ffffa095aebcf428 R14:
ffffa095ba566000 R15: ffffa094b0ede1c0
Oct 29 16:28:11 figini kernel: [445122.165932] FS:  0000000000000000(0000)
GS:ffffa095bfd80000(0000) knlGS:0000000000000000
Oct 29 16:28:11 figini kernel: [445122.165974] CS:  0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Oct 29 16:28:11 figini kernel: [445122.166005] CR2: 0000000000000070 CR3:
0000000176a49000 CR4: 00000000003406e0
Oct 29 16:28:11 figini kernel: [445122.166048] Call Trace:
Oct 29 16:28:11 figini kernel: [445122.166098]  i915_gem_reset+0xba/0x3a0
[i915]
Oct 29 16:28:11 figini kernel: [445122.166156]  ?
intel_uncore_forcewake_put.part.8+0x3e/0x50 [i915]
Oct 29 16:28:11 figini kernel: [445122.166222]  ? gen6_reset_engines+0xd0/0xd0
[i915]
Oct 29 16:28:11 figini kernel: [445122.166252]  ? bit_wait_io+0x60/0x60
Oct 29 16:28:11 figini kernel: [445122.166301]  i915_reset+0xdf/0x170 [i915]
Oct 29 16:28:11 figini kernel: [445122.166352] 
i915_reset_and_wakeup+0x17b/0x1b0 [i915]
Oct 29 16:28:11 figini kernel: [445122.166441]  i915_handle_error+0x206/0x210
[i915]
Oct 29 16:28:11 figini kernel: [445122.166470]  ? scnprintf+0x49/0x80
Oct 29 16:28:11 figini kernel: [445122.166526] 
hangcheck_declare_hang+0xe2/0x110 [i915]
Oct 29 16:28:11 figini kernel: [445122.166590]  ? fwtable_read32+0x8d/0x1d0
[i915]
Oct 29 16:28:11 figini kernel: [445122.166651] 
i915_hangcheck_elapsed+0x262/0x2d0 [i915]
Oct 29 16:28:11 figini kernel: [445122.166683]  process_one_work+0x1e7/0x410
Oct 29 16:28:11 figini kernel: [445122.166708]  worker_thread+0x4a/0x410
Oct 29 16:28:11 figini kernel: [445122.166730]  kthread+0x125/0x140
Oct 29 16:28:11 figini kernel: [445122.166750]  ? process_one_work+0x410/0x410
Oct 29 16:28:11 figini kernel: [445122.166775]  ?
kthread_create_on_node+0x70/0x70
Oct 29 16:28:11 figini kernel: [445122.166802]  ret_from_fork+0x25/0x30
Oct 29 16:28:11 figini kernel: [445122.166824] Code: 89 50 14 48 8b 83 80 00 00
00 8b 93 c0 01 00 00 89 50 20 48 8b bb 80 00 00 00 e8 e2 27 00 00 49 8b bc 24
a0 02 00 00 48 83 e7 fc <48> 8b 47 70 48 39 43 70 74 26 48 85 ff 74 05 f0 ff 0f
74 41 49 
Oct 29 16:28:11 figini kernel: [445122.166992] RIP:
reset_common_ring+0x9a/0x100 [i915] RSP: ffffc1a98146bb58
Oct 29 16:28:11 figini kernel: [445122.167030] CR2: 0000000000000070
Oct 29 16:28:11 figini kernel: [445122.182162] ---[ end trace 8a0b95373355dd67
]---
Oct 29 16:28:14 figini kernel: [445125.188143] asynchronous wait on fence
i915:Xorg[1040]/0:25153 timed out
Oct 29 16:28:14 figini kernel: [445125.188193] asynchronous wait on fence
i915:Xorg[1040]/0:25153 timed out
Oct 29 16:28:14 figini kernel: [445125.244213] pipe A vblank wait timed out
Oct 29 16:28:14 figini kernel: [445125.244224] pipe B vblank wait timed out
Oct 29 16:28:14 figini kernel: [445125.244350] ------------[ cut here
]------------

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