panic: assertwaitok: non-zero mutex count: 1
Starting stack trace...
panic(ffffffff82ff4d70) 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(ffffffff835b01d0,1) at pool_get+0x1e9 sys/kern/subr_pool.c:589
uvm_mapent_alloc(fffffd806c202820,0) at uvm_mapent_alloc+0x35a
uvm_map_protect(fffffd806c202820,20000000,20800000,4,0,0,b1fe3891ddd39020) at uvm_map_protect+0x888 sys/uvm/uvm_map.c:3138
sys_mprotect(ffff80002e3e0538,ffff800037675600,ffff800037675550) at sys_mprotect+0x34c sys/uvm/uvm_mmap.c:585
syscall(ffff800037675600) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x188f09736f0, count: 247
End of stack trace.