panic: assertwaitok: non-zero mutex count: 1
Starting stack trace...
panic(ffffffff82ff8c33) at panic+0x1ba sys/kern/subr_prf.c:229
assertwaitok() at assertwaitok+0x16f sys/kern/subr_xxx.c:163
mi_switch() at mi_switch+0x2b6 sys/kern/sched_bsd.c:412
yield() at yield+0x61 sys/kern/sched_bsd.c:320
pool_get(ffffffff835c3460,1) at pool_get+0x1e9 sys/kern/subr_pool.c:589
uvm_mapent_alloc(fffffd806c368b10,0) at 
uvm_mapent_alloc+0x35a
uvm_map_protect(fffffd806c368b10,20000000,20800000,5,0,0,e32d15d07da23e95) at uvm_map_protect+0x888 sys/uvm/uvm_map.c:3138
sys_mprotect(ffff8000376211d8,ffff8000376abe50,ffff8000376abda0) at sys_mprotect+0x34c sys/uvm/uvm_mmap.c:585
syscall(ffff8000376abe50) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2fbb601aa10, count: 247
End of stack trace.
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