uvm_fault(ffffee806c55a3e8,110c2c1000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff80003c3df040,110c2c1ece) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c3df040) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7ca456d65d90, count: -13
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(ffffee806c4ed690,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(ffffee806c4ed678,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(ffffee806c4ed678,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(ffffee806c3581d8,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(ffffee806c3581d8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:576
vfs_getcwd_common(ffffee806c3581d8,ffffee806c358898,0,0,200,0,e1a4efa3d4850e48) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(ffffee806c3581d8,ffffee806c358898,ffff8000fffe7a10) at vn_isunder+0x56 sys/kern/vfs_vnops.c:700
unp_externalize(ffffee80659fb600,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090
soreceive(ffff80000166ef00,ffff80003c3fd958,ffff80003c3fd908,0,ffff80003c3fd940,ffff80003c3fdacc,c37deebe5e2b8fae) at soreceive+0xc24 sys/kern/uipc_socket.c:1029
recvit(ffff8000fffe7a10,1,ffff80003c3fdaa0,0,ffff80003c3fdb50) at recvit+0x40b sys/kern/uipc_syscalls.c:1078
sys_recvmsg(ffff8000fffe7a10,ffff80003c3fdc00,ffff80003c3fdb50) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
syscall(ffff80003c3fdc00) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3fdc00) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78e6c50e580, count: -14