[Bug 98638] Panic on shutdown with AMDGPU and Ubuntu Plymouth

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98638

--- Comment #8 from Ernst Sjöstrand <ernstp at gmail.com> ---
Now I got this interesting blob:

[ 1457.810773] systemd-shutdown[1]: All swaps deactivated.
[ 1457.810777] systemd-shutdown[1]: Detaching loop devices.
[ 1457.814471] kvm: exiting hardware virtualization
[ 1458.021577] sd 4:0:0:0: [sdd] Synchronizing SCSI cache
[ 1458.022423] sd 4:0:0:0: [sdd] Stopping disk
[ 1458.058826] sd 3:0:0:0: [sdc] Synchronizing SCSI cache
[ 1458.059003] sd 3:0:0:0: [sdc] Stopping disk
[ 1458.059179] sd 2:0:0:0: [sdb] Synchronizing SCSI cache
[ 1458.059390] sd 2:0:0:0: [sdb] Stopping disk
[ 1458.248733] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 1458.248840] sd 0:0:0:0: [sda] Stopping disk
[ 1458.305064] [drm] amdgpu: finishing device.
[ 1459.409471] Console: switching to colour dummy device 80x25
[ 1459.417354] BUG: unable to handle kernel NULL pointer dereference at
0000000000000010
[ 1459.417367] IP: [<ffffffffc01f92aa>] amdgpu_fence_wait_empty+0x2a/0xd0
[amdgpu]
[ 1459.417398] PGD 0 [ 1459.417401] 
[ 1459.417405] Oops: 0000 [#1] SMP
[ 1459.417409] Modules linked in: netconsole configfs binfmt_misc eeepc_wmi
asus_wmi mxm_wmi video sparse_keymap intel_rapl x86_pkg_temp_thermal kvm_intel
kvm snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi
snd_hda_intel snd_hda_codec snd_hda_core irqbypass snd_pcm input_leds
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_hwdep snd_seq_midi
aesni_intel snd_seq_midi_event aes_x86_64 snd_rawmidi glue_helper lrw
ablk_helper cryptd snd_seq intel_cstate snd_timer intel_rapl_perf
snd_seq_device serio_raw snd mei_me mei soundcore lpc_ich mac_hid shpchp wmi
sbs sbshc max6650 coretemp parport_pc ppdev lp parport ip_tables x_tables
autofs4 btrfs xor raid6_pq hid_generic usbhid hid amdkfd amd_iommu_v2 amdgpu
i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm
drm psmouse e1000e ahci ptp libahci pps_core fjes
[ 1459.417534] CPU: 1 PID: 2847 Comm: plymouthd Not tainted 4.9.0-rc4+ #78
[ 1459.417537] Hardware name: System manufacturer System Product Name/P8P67 PRO
REV 3.1, BIOS 1704 06/08/2011
[ 1459.417540] task: ffff92d031034380 task.stack: ffffb33482184000
[ 1459.417543] RIP: 0010:[<ffffffffc01f92aa>]  [<ffffffffc01f92aa>]
amdgpu_fence_wait_empty+0x2a/0xd0 [amdgpu]
[ 1459.417565] RSP: 0018:ffffb33482187af0  EFLAGS: 00010202
[ 1459.417568] RAX: 0000000000000010 RBX: ffff92d02f28a938 RCX:
0000000000000000
[ 1459.417571] RDX: 0000000000000000 RSI: 0000000000004532 RDI:
ffff92d02f28c570
[ 1459.417573] RBP: ffffb33482187b00 R08: 0000000000000004 R09:
0000000000030003
[ 1459.417576] R10: 0000000000030303 R11: 0000000000004000 R12:
ffff92d02f288000
[ 1459.417578] R13: ffff92d02f28a9b0 R14: ffff92d02fee4800 R15:
0000000000000000
[ 1459.417582] FS:  00007f86ba048b80(0000) GS:ffff92d03f480000(0000)
knlGS:0000000000000000
[ 1459.417585] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1459.417587] CR2: 0000000000000010 CR3: 00000002301b6000 CR4:
00000000000406e0
[ 1459.417590] Stack:
[ 1459.417592]  ffff92d02fee4800 ffff92d02f28a938 ffffb33482187b40
ffffffffc02096d2
[ 1459.417600]  ffffb33482187b40 0000000028d54302 ffff92d02f514000
ffff92d02f288000
[ 1459.417608]  0000000000000000 0000000000000003 ffffb33482187b68
ffffffffc0227945
[ 1459.417615] Call Trace:
[ 1459.417640]  [<ffffffffc02096d2>] amdgpu_pm_compute_clocks+0x92/0x560
[amdgpu]
[ 1459.417666]  [<ffffffffc0227945>] dce_v10_0_crtc_dpms+0xd5/0x110 [amdgpu]
[ 1459.417676]  [<ffffffffc01ae4e2>] drm_helper_connector_dpms+0x82/0x100
[drm_kms_helper]
[ 1459.417700]  [<ffffffffc0227870>] ? dce_v10_0_bandwidth_update+0x260/0x260
[amdgpu]
[ 1459.417709]  [<ffffffffc01af91f>] drm_crtc_helper_set_config+0xabf/0xaf0
[drm_kms_helper]
[ 1459.417731]  [<ffffffffc01ff148>] amdgpu_crtc_set_config+0x48/0x120 [amdgpu]
[ 1459.417749]  [<ffffffffc0118cd5>] drm_mode_set_config_internal+0x65/0x110
[drm]
[ 1459.417765]  [<ffffffffc011a4bd>] drm_mode_setcrtc+0x3fd/0x4f0 [drm]
[ 1459.417779]  [<ffffffffc0110f8b>] drm_ioctl+0x21b/0x4c0 [drm]
[ 1459.417794]  [<ffffffffc011a0c0>] ? drm_mode_getcrtc+0x140/0x140 [drm]
[ 1459.417812]  [<ffffffffc01e804f>] amdgpu_drm_ioctl+0x4f/0x90 [amdgpu]
[ 1459.417819]  [<ffffffffb7440c03>] do_vfs_ioctl+0xa3/0x600
[ 1459.417823]  [<ffffffffb74411d9>] SyS_ioctl+0x79/0x90
[ 1459.417829]  [<ffffffffb7a60b3b>] entry_SYSCALL_64_fastpath+0x1e/0xad
[ 1459.417832] Code: 90 66 66 66 66 90 8b 47 20 85 c0 0f 84 9a 00 00 00 55 48
89 e5 53 48 83 ec 08 23 87 88 00 00 00 48 8b 97 90 00 00 00 48 8d 04 c2 <48> 8b
18 48 85 db 74 6f 8b 0b 85 c9 74 69 8d 51 01 89 c8 f0 0f 
[ 1459.417923] RIP  [<ffffffffc01f92aa>] amdgpu_fence_wait_empty+0x2a/0xd0
[amdgpu]
[ 1459.417945]  RSP <ffffb33482187af0>
[ 1459.417947] CR2: 0000000000000010
[ 1459.417951] ---[ end trace 71c209200bdc61d0 ]---

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