[3667656.863033] BUG: unable to handle kernel NULL pointer dereference at           (null)
[3667656.863163] IP: dce110_vblank_set+0x4f/0xb0 [amdgpu]
[3667656.863164] PGD 1efa61067 P4D 1efa61067 PUD 1da8f5067 PMD 0
[3667656.863168] Oops: 0000 [#1] PREEMPT SMP NOPTI
[3667656.863170] Modules linked in: ccm ax25 nls_iso8859_1 nls_cp437 vfat fat edac_mce_amd kvm_amd amdkfd amd_iommu_v2 kvm snd_hda_codec_realtek irqbypass joydev input_leds mousedev crct10dif_pclmul amdgpu snd_hda_codec_generic crc32_pclmul ghash_clmulni_intel snd_hda_codec_hdmi eeepc_wmi asus_wmi sparse_keymap mxm_wmi arc4 pcbc aesni_intel snd_hda_intel snd_hda_codec ath9k snd_hda_core chash ath9k_common ttm ath9k_hw snd_hwdep snd_pcm wmi_bmof aes_x86_64 drm_kms_helper snd_timer drm crypto_simd ath glue_helper mac80211 cryptd agpgart snd cfg80211 syscopyarea sysfillrect r8169 sysimgblt rfkill led_class mii pcspkr fb_sys_fops soundcore i2c_algo_bit fam15h_power sp5100_tco rtc_cmos evdev wmi shpchp i2c_piix4 mac_hid k10temp sch_fq_codel crypto_user ip_tables x_tables ext4 crc16 mbcache jbd2 fscrypto hid_logitech_hidpp
[3667656.863206]  hid_logitech_dj hid_generic usbhid hid sd_mod ohci_pci xhci_pci ahci ehci_pci libahci ehci_hcd xhci_hcd crc32c_intel ohci_hcd libata scsi_mod usbcore usb_common
[3667656.863227] CPU: 4 PID: 9351 Comm: xfwm4 Tainted: G        W        4.15.2-2-ARCH #1
[3667656.863229] Hardware name: To be filled by O.E.M. To be filled by O.E.M./M5A97 R2.0, BIOS 2301 01/06/2014
[3667656.863273] RIP: 0010:dce110_vblank_set+0x4f/0xb0 [amdgpu]
[3667656.863274] RSP: 0018:ffffb394012a7bc0 EFLAGS: 00010002
[3667656.863276] RAX: ffff9eb61590c000 RBX: 0000000000000001 RCX: 0000000000000000
[3667656.863277] RDX: 0000000000000000 RSI: 000000000000000c RDI: 0000000000000000
[3667656.863278] RBP: ffff9eb6695cdb60 R08: 0000000000000000 R09: 0000000000000000
[3667656.863279] R10: 0000000000000000 R11: 0000000000000246 R12: ffff9eb672957500
[3667656.863280] R13: ffffffffc0b55ba0 R14: ffff9eb667e90000 R15: ffff9eb66c6ac368
[3667656.863282] FS:  00007fd852bfb980(0000) GS:ffff9eb67ed00000(0000) knlGS:0000000000000000
[3667656.863283] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[3667656.863284] CR2: 0000000000000000 CR3: 0000000225ab4000 CR4: 00000000000406e0
[3667656.863289] Call Trace:
[3667656.863330]  amdgpu_dm_set_crtc_irq_state+0x31/0x60 [amdgpu]
[3667656.863363]  amdgpu_irq_update+0x55/0x90 [amdgpu]
[3667656.863382]  drm_vblank_enable+0x84/0x100 [drm]
[3667656.863393]  drm_vblank_get+0x8d/0xb0 [drm]
[3667656.863403]  drm_wait_vblank_ioctl+0x12a/0x6a0 [drm]
[3667656.863408]  ? unix_stream_recvmsg+0x53/0x70
[3667656.863417]  ? drm_legacy_modeset_ctl_ioctl+0x100/0x100 [drm]
[3667656.863426]  drm_ioctl_kernel+0x5b/0xb0 [drm]
[3667656.863436]  drm_ioctl+0x2d5/0x370 [drm]
[3667656.863446]  ? drm_legacy_modeset_ctl_ioctl+0x100/0x100 [drm]
[3667656.863449]  ? do_iter_write+0xdc/0x190
[3667656.863451]  ? vfs_writev+0xb9/0x110
[3667656.863480]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[3667656.863483]  do_vfs_ioctl+0xa4/0x630
[3667656.863486]  ? __sys_recvmsg+0x4e/0x90
[3667656.863488]  ? __sys_recvmsg+0x7d/0x90
[3667656.863490]  SyS_ioctl+0x74/0x80
[3667656.863493]  do_syscall_64+0x75/0x190
[3667656.863495]  entry_SYSCALL_64_after_hwframe+0x21/0x86
[3667656.863498] RIP: 0033:0x7fd84f1ecd87
[3667656.863499] RSP: 002b:00007ffc61244868 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[3667656.863500] RAX: ffffffffffffffda RBX: 00007ffc61244890 RCX: 00007fd84f1ecd87
[3667656.863501] RDX: 00007ffc61244890 RSI: 00000000c018643a RDI: 0000000000000006
[3667656.863503] RBP: 000000000138edf0 R08: 0000000000800184 R09: 0000000000000000
[3667656.863504] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000c018643a
[3667656.863505] R13: 000000000089313e R14: 0000000001489620 R15: 0000000000000000
[3667656.863506] Code: e8 87 21 04 00 83 e8 4e 0f b6 d0 48 89 d0 48 c1 e0 05 48 01 d0 48 c1 e0 05 49 03 86 60 01 00 00 84 db 48 8b b8 78 02 00 00 74 18 <48> 8b 07 be 02 00 00 00 48 8b 80 d8 00 00 00 e8 bd a4 f4 e1 84
[3667656.863563] RIP: dce110_vblank_set+0x4f/0xb0 [amdgpu] RSP: ffffb394012a7bc0
[3667656.863564] CR2: 0000000000000000
[3667656.863565] ---[ end trace 6f2d16ee8742a079 ]---
[3667656.863568] note: xfwm4[9351] exited with preempt_count 3