uvm_fault(fffffd8060043d80,d538d61e000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650
upageflttrap(ffff80003c3fe6d0,d538d61e000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c3fe6d0) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x79e1cc756a60, 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(fffffd806f3e4808,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806f3e47f0,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806f3e47f0,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd805e468b08,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd805e468b08,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd805e468b08,fffffd805e4687a8,0,0,200,0,a108f2de6e87647d) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd805e468b08,fffffd805e4687a8,ffff8000fffef770) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd80619e9800,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090
soreceive(ffff800010fdda80,ffff80003bff26e8,ffff80003bff2698,0,ffff80003bff26d0,ffff80003bff285c,7140f04418b0ec45) at soreceive+0xc24 sys/kern/uipc_socket.c:1017
recvit(ffff8000fffef770,4,ffff80003bff2830,0,ffff80003bff28e0) at recvit+0x40b sys/kern/uipc_syscalls.c:1078
sys_recvmsg(ffff8000fffef770,ffff80003bff2990,ffff80003bff28e0) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
syscall(ffff80003bff2990) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003bff2990) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x18b42481060, count: -14