Nouveau - Mar 2018 - [Bug 105173] [MCP79][Regression] Unhandled NULL pointer dereference in nvkm_object_unmap since kernel 4.15

https://bugs.freedesktop.org/show_bug.cgi?id=105173

--- Comment #15 from Nick Lee <nvlbox at gmail.com> ---
today I got that (without OOM Error):

[ 1868.631494] nouveau 0000:03:00.0: gr: magic set 0:
[ 1868.631502] nouveau 0000:03:00.0: gr:        00408604: 98084805
[ 1868.631507] nouveau 0000:03:00.0: gr:        00408608: 00383d66
[ 1868.631511] nouveau 0000:03:00.0: gr:        0040860c: 40000430
[ 1868.631515] nouveau 0000:03:00.0: gr:        00408610: 3bd00002
[ 1868.631520] nouveau 0000:03:00.0: gr: TRAP_TEXTURE - TP0: 00000009 [
LINEAR_MISMATCH]
[ 1868.631527] nouveau 0000:03:00.0: gr: 00200000 [] ch 24 [000db13000
Xwayland[2070]] subc 3 class 8397 mthd 0f04 data 00000000

I don't know when moment it happened and how to reproduce. Graphics system
works without issues (without artefacts etc) The same I got earlier on kernels
< 4.15.

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