uvm_fault(fffffd806eb8dab8,110c296000,0,1) at uvm_fault+0x272
upageflttrap(ffff80003c56a470,110c29696a) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80003c56a470) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x703bc6c99a10, 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:437
witness_checkorder(fffffd80652aaa78,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd80652aaa60,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd80652aaa60,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd8064663a78,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd8064663a78,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd8064663a78,fffffd8064663a78,0,0,200,0,53407cfaf5c1bbb3) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd8064663a78,fffffd8064663a78,ffff80003c4eef88) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd80780a2b00,33,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086
soreceive(ffff8000014b9b20,ffff8000388c60f8,ffff8000388c60a8,0,ffff8000388c60e8,ffff8000388c626c,e1975168d83877cf) at soreceive+0xc73 sys/kern/uipc_socket.c:1021
recvit(ffff80003c4eef88,4,ffff8000388c6240,0,ffff8000388c62f0) at recvit+0x40a sys/kern/uipc_syscalls.c:1072
sys_recvmsg(ffff80003c4eef88,ffff8000388c63a0,ffff8000388c62f0) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
syscall(ffff8000388c63a0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000388c63a0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x420c18a8960, count: -14