uvm_fault(fffffd806be30018,f2a21a9c000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:673
upageflttrap(ffff8000380c0e50,f2a21a9c8b0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff8000380c0e50) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7865934f5420, count: -17
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(fffffd806867c2d0,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806867c2b8,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806867c2b8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd80760b8e58,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd80760b8e58,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff80003c54c988) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
namei(ffff80003c54c988) at namei+0x7aa sys/kern/vfs_lookup.c:250
unp_connect(ffff800010fe1af0,fffffd806ca19300,ffff8000ffff6548) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868
uipc_dgram_send(ffff800010fe1af0,fffffd80622b2e00,fffffd806ca19300,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607
sosend(ffff800010fe1af0,fffffd806ca19300,ffff80003c54cc08,0,0,0) at sosend+0x804
sendit(ffff8000ffff6548,5,ffff80003c54cd80,0,ffff80003c54ce40) at sendit+0x721 sys/kern/uipc_syscalls.c:779
sys_sendmsg(ffff8000ffff6548,ffff80003c54cef0,ffff80003c54ce40) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597
syscall(ffff80003c54cef0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c54cef0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x9af2496b220, count: -15