[Bug 253331] reproducible crash with graphics/drm-fbsd13-kmod

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253331

--- Comment #8 from George Michaelson <ggm at algebras.org> ---
Sorry. I was stupid with the paste.

I confirm amdgpu.ko is not live.

WARN_ON(!mutex_is_locked(&fbc->lock))WARN_ON(!mutex_is_locked(&fbc->lock))
panic: general protection fault
cpuid = 0
time = 1612878311
KDB: stack backtrace:
#0 0xffffffff80c46315 at kdb_backtrace+0x65
#1 0xffffffff80bf8ee1 at vpanic+0x181
#2 0xffffffff80bf8d53 at panic+0x43
#3 0xffffffff8102d1a7 at trap_fatal+0x387
#4 0xffffffff8102c66e at trap+0x8e
#5 0xffffffff81003d38 at calltrap+0x8
#6 0xffffffff80ee1207 at vm_page_busy_acquire+0x127
#7 0xffffffff82a7cb2e at ttm_bo_vm_fault+0x2ce
#8 0xffffffff82c9043f at radeon_ttm_fault+0x4f
#9 0xffffffff82a50c8b at linux_cdev_pager_populate+0x11b
#10 0xffffffff80ecb0a2 at vm_fault_allocate+0x2a2
#11 0xffffffff80ec9dd6 at vm_fault+0x416
#12 0xffffffff80ec989d at vm_fault_trap+0x6d
#13 0xffffffff8102d3a8 at trap_pfault+0x1f8
#14 0xffffffff8102c9dd at trap+0x3fd
#15 0xffffffff81003d38 at calltrap+0x8
Uptime: 4m30s
Dumping 489 out of 8064 MB:..4%..14%..23%..33%..43%..53%..63%..72%..82%..92%

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