uvm_fault(fffffd806bea01e0,2f99ab5b000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:668
upageflttrap(ffff8000394ce410,2f99ab5bf50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff8000394ce410) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7dc03f594830, count: -14
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(fffffd80641fc618,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd80641fc600,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd80641fc600,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd805df3b8c8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd805df3b8c8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd805df3b8c8,fffffd805de54ea8,0,0,200,0,1c4c809cbcd948ef) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd805df3b8c8,fffffd805de54ea8,ffff800038cbe028) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd806bc49b00,33,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086
soreceive(ffff8000014dd5d8,ffff80002eca4c98,ffff80002eca4c48,0,ffff80002eca4c88,ffff80002eca4e0c,c27a3afe116421cd) at soreceive+0xc73 sys/kern/uipc_socket.c:1021
recvit(ffff800038cbe028,5,ffff80002eca4de0,0,ffff80002eca4e90) at recvit+0x40a sys/kern/uipc_syscalls.c:1072
sys_recvmsg(ffff800038cbe028,ffff80002eca4f40,ffff80002eca4e90) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
syscall(ffff80002eca4f40) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002eca4f40) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x641005ad6a0, count: -14