https://bugs.kde.org/show_bug.cgi?id=402011

--- Comment #1 from Moritz Lüdecke <ritze+...@skweez.net> ---
A few days before my kernel crashed every time I open Skrooge:

```
[   31.663401] BUG: unable to handle kernel NULL pointer dereference at
0000000000000080
[   31.663403] PGD 0 P4D 0 
[   31.663405] Oops: 0000 [#1] PREEMPT SMP PTI
[   31.663407] CPU: 0 PID: 1471 Comm: gst-plugin-scan Tainted: P           OE  
  4.19.4-arch1-1-ARCH #1
[   31.663408] Hardware name: System manufacturer System Product Name/Z170 PRO
GAMING, BIOS 3202 02/07/2017
[   31.663418] RIP: 0010:drm_lease_owner+0xd/0x20 [drm]
[   31.663419] Code: 83 c4 18 5b 5d c3 b8 ea ff ff ff eb e2 b8 ed ff ff ff eb
db e8 b4 6a bc f4 0f 1f 40 00 0f 1f 44 00 00 48 89 f8 eb 03 48 89 d0 <48> 8b 90
80 00 00 00 48 85 d2 75 f1 c3 66 0f 1f 44 00 00 0f 1f 44
[   31.663420] RSP: 0018:ffffada08293fbb0 EFLAGS: 00010202
[   31.663422] RAX: 0000000000000000 RBX: ffff9cdffe51d400 RCX:
ffff9cdffe51d488
[   31.663422] RDX: ffff9cdfc0990000 RSI: 0000000000000000 RDI:
0000000000000000
[   31.663423] RBP: ffff9ce05f56a000 R08: 0000000000000000 R09:
0000000000000000
[   31.663424] R10: ffffe7be4f8432c0 R11: ffffe7be4e025a08 R12:
ffff9ce05f56a088
[   31.663425] R13: 0000000000000000 R14: dead000000000200 R15:
ffff9cdffe51d4c8
[   31.663426] FS:  00007f1d2173bb80(0000) GS:ffff9ce066a00000(0000)
knlGS:0000000000000000
[   31.663427] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   31.663428] CR2: 0000000000000080 CR3: 0000000380a7c005 CR4:
00000000003606f0
[   31.663429] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[   31.663430] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[   31.663430] Call Trace:
[   31.663436]  drm_is_current_master+0x1a/0x30 [drm]
[   31.663441]  drm_master_release+0x3e/0x130 [drm]
[   31.663446]  drm_file_free.part.0+0x2be/0x2d0 [drm]
[   31.663451]  drm_open+0x1ba/0x1e0 [drm]
[   31.663456]  drm_stub_open+0xaf/0xe0 [drm]
[   31.663459]  chrdev_open+0xa3/0x1b0
[   31.663461]  ? cdev_put.part.0+0x20/0x20
[   31.663463]  do_dentry_open+0x132/0x340
[   31.663465]  path_openat+0x2d1/0x14e0
[   31.663468]  ? uevent_show+0xde/0x100
[   31.663469]  do_filp_open+0x93/0x100
[   31.663472]  ? __audit_syscall_exit+0x22a/0x290
[   31.663473]  ? __check_object_size+0x102/0x189
[   31.663475]  ? _raw_spin_unlock+0x16/0x30
[   31.663477]  do_sys_open+0x186/0x210
[   31.663479]  do_syscall_64+0x5b/0x170
[   31.663481]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   31.663482] RIP: 0033:0x7f1d222798ef
[   31.663483] Code: 52 89 f0 25 00 00 41 00 3d 00 00 41 00 74 44 8b 05 be e8
00 00 85 c0 75 65 89 f2 b8 01 01 00 00 48 89 fe bf 9c ff ff ff 0f 05 <48> 3d 00
f0 ff ff 0f 87 9d 00 00 00 48 8b 4c 24 28 64 48 33 0c 25
[   31.663484] RSP: 002b:00007ffe83abe920 EFLAGS: 00000246 ORIG_RAX:
0000000000000101
[   31.663486] RAX: ffffffffffffffda RBX: 000056177a02b170 RCX:
00007f1d222798ef
[   31.663487] RDX: 0000000000080002 RSI: 000056177a02f8a0 RDI:
00000000ffffff9c
[   31.663487] RBP: 000056177a02b210 R08: 00007f1d215f7410 R09:
00000000000000f0
[   31.663488] R10: 0000000000000000 R11: 0000000000000246 R12:
000056177a02f230
[   31.663489] R13: 000056177a02b170 R14: 000056177a02e620 R15:
000056177a0105f0
[   31.663490] Modules linked in: fuse uinput snd_hda_codec_hdmi xpad
input_leds ff_memless joydev eeepc_wmi mousedev asus_wmi sparse_keymap
intel_rapl iTCO_wdt iTCO_vendor_support rfkill wmi_bmof mxm_wmi
x86_pkg_temp_thermal snd_hda_codec_realtek intel_powerclamp
snd_hda_codec_generic coretemp nls_iso8859_1 kvm_intel snd_hda_intel nls_cp437
snd_hda_codec vfat fat kvm snd_hda_core snd_hwdep snd_pcm irqbypass
intel_cstate intel_uncore snd_timer snd e1000e intel_rapl_perf i2c_i801 mei_me
soundcore mei evdev mac_hid wmi pcc_cpufreq vboxnetflt(OE) vboxnetadp(OE)
vboxpci(OE) vboxdrv(OE) crypto_user ip_tables x_tables ext4 crc32c_generic
crc16 mbcache jbd2 fscrypto algif_skcipher af_alg hid_generic usbhid hid
dm_crypt dm_mod sd_mod crct10dif_pclmul crc32_pclmul crc32c_intel
ghash_clmulni_intel pcbc ahci libahci
[   31.663518]  aesni_intel libata aes_x86_64 crypto_simd cryptd glue_helper
xhci_pci scsi_mod xhci_hcd nvidia_drm(POE) drm_kms_helper syscopyarea
sysfillrect sysimgblt fb_sys_fops drm agpgart nvidia_uvm(OE)
nvidia_modeset(POE) nvidia(POE) ipmi_devintf ipmi_msghandler
[   31.663526] CR2: 0000000000000080
[   31.663528] ---[ end trace 6d725a2220698578 ]---
[   31.663534] RIP: 0010:drm_lease_owner+0xd/0x20 [drm]
[   31.663535] Code: 83 c4 18 5b 5d c3 b8 ea ff ff ff eb e2 b8 ed ff ff ff eb
db e8 b4 6a bc f4 0f 1f 40 00 0f 1f 44 00 00 48 89 f8 eb 03 48 89 d0 <48> 8b 90
80 00 00 00 48 85 d2 75 f1 c3 66 0f 1f 44 00 00 0f 1f 44
[   31.663536] RSP: 0018:ffffada08293fbb0 EFLAGS: 00010202
[   31.663537] RAX: 0000000000000000 RBX: ffff9cdffe51d400 RCX:
ffff9cdffe51d488
[   31.663538] RDX: ffff9cdfc0990000 RSI: 0000000000000000 RDI:
0000000000000000
[   31.663539] RBP: ffff9ce05f56a000 R08: 0000000000000000 R09:
0000000000000000
[   31.663539] R10: ffffe7be4f8432c0 R11: ffffe7be4e025a08 R12:
ffff9ce05f56a088
[   31.663540] R13: 0000000000000000 R14: dead000000000200 R15:
ffff9cdffe51d4c8
[   31.663541] FS:  00007f1d2173bb80(0000) GS:ffff9ce066a00000(0000)
knlGS:0000000000000000
[   31.663542] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   31.663543] CR2: 0000000000000080 CR3: 0000000380a7c005 CR4:
00000000003606f0
[   31.663544] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[   31.663545] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[   46.151144] audit: type=1131 audit(1543590274.430:49): pid=1 uid=0
auid=4294967295 ses=4294967295 msg='unit=systemd-hostnamed comm="systemd"
exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
```
After updating the kernel to 4.19.8, didn't happen again.

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