uvm_fault(fffffd8075d65028,ecfa609c000,0,4) at uvm_fault+0x2f0 sys/uvm/uvm_fault.c:637
upageflttrap(ffff8000372f9780,ecfa609cba0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff8000372f9780) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7a874259cbf0, count: -16
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
witness_checkorder(ffff8000014dd028,9,0) at witness_checkorder+0x1b4
rw_enter_write(ffff8000014dd018) at rw_enter_write+0x7a sys/kern/kern_rwlock.c:128
unveil_delete_names(ffff8000014dd000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102
unveil_destroy(ffff8000ffffb670) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183
exit1(ffff8000371f6ce8,b,0,1) at exit1+0x60f sys/kern/kern_exit.c:233
sys_exit(ffff8000371f6ce8,ffff800037277ce0,ffff800037277c30) at sys_exit+0x1a
syscall(ffff800037277ce0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff800037277ce0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78a2cb61e380, count: -9