uvm_fault(fffffd806c5639a8,ad010b9a000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650
upageflttrap(ffff80003c491770,ad010b9a000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c491770) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7ba28241efa0, count: -11
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(fffffd806c6571e8,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806c6571d0,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806c6571d0,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd806b55a2c8,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd806b55a2c8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:576
vfs_getcwd_common(fffffd806b55a2c8,fffffd806b55a2c8,0,0,200,0,451fcc083139d52c) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd806b55a2c8,fffffd806b55a2c8,ffff800037ba0a88) at vn_isunder+0x56 sys/kern/vfs_vnops.c:700
unp_externalize(fffffd807ea6de00,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090
soreceive(ffff800010fda308,ffff80003339e898,ffff80003339e848,0,ffff80003339e880,ffff80003339ea0c,6e54688388fe11cb) at soreceive+0xc24 sys/kern/uipc_socket.c:1029
recvit(ffff800037ba0a88,4,ffff80003339e9e0,0,ffff80003339ea90) at recvit+0x40b sys/kern/uipc_syscalls.c:1078
sys_recvmsg(ffff800037ba0a88,ffff80003339eb40,ffff80003339ea90) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
syscall(ffff80003339eb40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003339eb40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7dd35357300, count: -14