uvm_fault(fffffd806c6d5018,110c296000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff8000337970d0,110c296a0e) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff8000337970d0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x764b34683450, count: -15
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:438
witness_checkorder(fffffd806c191c58,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806c191c40,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806c191c40,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd80602e76f8,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd80602e76f8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:576
vfs_getcwd_common(fffffd80602e76f8,fffffd80602e7620,0,0,200,0,764ea5a843e98e20) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd80602e76f8,fffffd80602e7620,ffff80003bbb9a10) at vn_isunder+0x56 sys/kern/vfs_vnops.c:700
unp_externalize(fffffd806f12fb00,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090
soreceive(ffff800010fdb4a8,ffff80003bfc94f8,ffff80003bfc94a8,0,ffff80003bfc94e0,ffff80003bfc966c,a96efb10e86765af) at soreceive+0xc24 sys/kern/uipc_socket.c:1029
recvit(ffff80003bbb9a10,4,ffff80003bfc9640,0,ffff80003bfc96f0) at recvit+0x40b sys/kern/uipc_syscalls.c:1078
sys_recvmsg(ffff80003bbb9a10,ffff80003bfc97a0,ffff80003bfc96f0) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
syscall(ffff80003bfc97a0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003bfc97a0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe4d86f93e70, count: -14