uvm_fault(fffffd806b4829a8,a403515d000,0,2) at uvm_fault+0x19c sys/uvm/uvm_fault.c:685
upageflttrap(ffff80003c45f860,a403515d078) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c45f860) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f2ddeeb60a0, 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(fffffd806adfd7d0,9,0) at witness_checkorder+0x10fb sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806adfd7b8,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806adfd7b8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd8065475b58,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527
vn_lock(fffffd8065475b58,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff8000327f7088) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
namei(ffff8000327f7088) at namei+0x7aa sys/kern/vfs_lookup.c:250
unp_connect(ffff8000014dcc58,fffffd806110ea00,ffff8000327f87d0) at unp_connect+0x27d sys/kern/uipc_usrreq.c:872
uipc_dgram_send(ffff8000014dcc58,fffffd806110eb00,fffffd806110ea00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:609
sosend(ffff8000014dcc58,fffffd806110ea00,ffff8000327f7308,0,0,8) at sosend+0x804 sys/kern/uipc_socket.c:-1
sendit(ffff8000327f87d0,4,ffff8000327f7480,8,ffff8000327f7540) at sendit+0x721 sys/kern/uipc_syscalls.c:779
sys_sendmsg(ffff8000327f87d0,ffff8000327f75f0,ffff8000327f7540) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597
syscall(ffff8000327f75f0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000327f75f0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x712b283ce00, count: -15