login: panic: mtx_lock() of spin mutex (null) @ /nest/POWER9BSD/sys/powerpc/aim/mmu_oea64.c:2101
cpuid = 66
time = 1551914081
KDB: stack backtrace:
0xc008000110bd32c0: at kdb_backtrace+0x64
0xc008000110bd33d0: at vpanic+0x25c
0xc008000110bd3480: at panic+0x3c
0xc008000110bd34b0: at __mtx_lock_flags+0x158
0xc008000110bd3530: at moea64_get_unique_vsid+0x58
0xc008000110bd35d0: at allocate_user_vsid+0x70
0xc008000110bd3670: at trap+0x7e4
0xc008000110bd3780: at powerpc_interrupt+0x10c
0xc008000110bd3810: user DSE trap @ 0x6767726567617465 by 0x100009bc: srr1=0x900000000000f032
            r1=0xfffffbfffe900 cr=0x24000022 xer=0 ctr=0x8103fce70 r2=0x10018e00
KDB: enter: panic
[ thread pid 1286 tid 101983 ]
Stopped at      kdb_enter+0x78: ori     r0, r0, 0x0
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