uvm_fault(fffffd806a2e87a0,e6f01fe4000,0,4) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff80003c437150,e6f01fe4580) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c437150) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x714f704bd5a0, count: -16
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(fffffd8079485788,9,0) at witness_checkorder+0x10fb sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd8079485770,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:232
rrw_enter(fffffd8079485770,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:605
VOP_LOCK(fffffd805d41b018,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527
vn_lock(fffffd805d41b018,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd805d41b018,fffffd805d5f7a68,0,0,200,0,a7e608d865cf701c) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd805d41b018,fffffd805d5f7a68,ffff80002a3139d8) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd800e4ac900,33,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1090
soreceive(ffff8000015322e8,ffff80003c449208,ffff80003c4491b8,0,ffff80003c4491f8,ffff80003c44937c,9d73e08d689561d8) at soreceive+0xc73 sys/kern/uipc_socket.c:1005
recvit(ffff80002a3139d8,6,ffff80003c449350,0,ffff80003c449400) at recvit+0x40a sys/kern/uipc_syscalls.c:1072
sys_recvmsg(ffff80002a3139d8,ffff80003c4494b0,ffff80003c449400) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
syscall(ffff80003c4494b0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4494b0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x1a8e9285570, count: -14