kern/57183: X crashed when nouveau drm fifo crashed nvidia geforce gt 1030

[mrg%eterna.com.au@localhost]

>Number:         57183
>Category:       kern
>Synopsis:       X crashed when nouveau drm fifo crashed nvidia geforce gt 1030
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jan 12 08:15:00 +0000 2023
>Originator:     matthew green
>Release:        NetBSD 10.99.1
>Organization:
people's front against (bozotic) www (softwar foundation)
>Environment:
Architecture: amd64
Machine: amd64
>Description:

	after a couple of weeks usage, my X crashed with this error,
	as seen in Xorg log file:

	[2047799.482] (EE) Backtrace:
	[2047799.512] (EE) 0: /usr/X11R7/bin/X (xorg_backtrace+0x44) [0x115bb26c5]
	[2047799.512] (EE) 1: /usr/X11R7/bin/X (os_move_fd+0x79) [0x115bae465]
	[2047799.512] (EE) 2: /usr/lib/libc.so.12 (__sigtramp_siginfo_2+0x0) [0x6fa90d535a30]
	[2047799.512] (EE) Caught signal 6 (Abort trap). Server aborting

	the kernel dmesg shows:

	nouveau0: autoconfiguration error: error: fifo: fault 01 [WRITE] at 0000000000058000 engine 06 [HOST0] client 07 [HUB/HOST_CPU] reason 02 [PTE] on channel 2 [007fb21000 user]
	nouveau0: notice: fifo: channel 2: killed
	nouveau0: warn: user: channel 2 killed!
	nouveau0: notice: fifo: runlist 0: scheduled for recovery
	nouveau0: notice: fifo: engine 7: scheduled for recovery
	nouveau0: autoconfiguration error: error: fifo: PBDMA0: 01000000 [] ch 9 [007f798000 user] subc 0 mthd 17c8 data 00000000
	nouveau0: autoconfiguration error: error: fifo: PBDMA0: 01000000 [] ch 9 [007f798000 user] subc 0 mthd 17cc data 134b8000
	nouveau0: autoconfiguration error: error: gr: intr 00000040

	the code shows this was almost certainly gp100_fifo_intr_fault()
	calling nvkm_fifo_fault() for the first message, as the card is
	a GP108:

	nouveau0 at pci10 dev 0 function 0: NVIDIA GeForce GT 1030 (rev. 0xa1)
	nouveau0: NVIDIA GP108 (138000a1)

>How-To-Repeat:

	mpv, multiple firefox, were active., as well as dozens of xterms,
	were active when it crashed, but that's a normal usage.

>Fix: