uvm_fault(fffffd805a03a988,e078db54000,0,1) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff80003c49be30,e078db547c8) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c49be30) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x74f7b7708120, count: -14
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(fffffd806e4401e8,9,0) at witness_checkorder+0x10fb sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806e4401d0,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:232
rrw_enter(fffffd806e4401d0,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:605
VOP_LOCK(fffffd8059b50388,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527
vn_lock(fffffd8059b50388,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd8059b50388,fffffd8059b50388,0,0,200,0,aafaa9049d215ac9) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd8059b50388,fffffd8059b50388,ffff80003c49c7e0) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd806cd85000,33,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1090
soreceive(ffff8000016deb78,ffff80002a287fb8,ffff80002a287f68,0,ffff80002a287fa8,ffff80002a28812c,defe7d382f8c4320) at soreceive+0xc73 sys/kern/uipc_socket.c:1005
recvit(ffff80003c49c7e0,5,ffff80002a288100,0,ffff80002a2881b0) at recvit+0x40a sys/kern/uipc_syscalls.c:1072
sys_recvmsg(ffff80003c49c7e0,ffff80002a288260,ffff80002a2881b0) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
syscall(ffff80002a288260) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a288260) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xedd75072b00, count: -14