uvm_fault(fffffd806c857d78,2d9b972c000,0,4) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff80002a31aaf0,2d9b972c6e0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80002a31aaf0) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7684a35b5bb0, 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(fffffd80651be210,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd80651be1f8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd80651be1f8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd806a4718d0,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd806a4718d0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff80003c471100) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1
namei(ffff80003c471100) at namei+0x7ca sys/kern/vfs_lookup.c:250
unp_connect(ffff8000015f69d0,fffffd805f1a8500,ffff80003c40bcb8) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872
uipc_dgram_send(ffff8000015f69d0,fffffd805e369c00,fffffd805f1a8500,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609
sosend(ffff8000015f69d0,fffffd805f1a8500,ffff80003c471388,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1
sendit(ffff80003c40bcb8,6,ffff80003c471508,e,ffff80003c4715c0) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785
sys_sendmsg(ffff80003c40bcb8,ffff80003c471670,ffff80003c4715c0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603
syscall(ffff80003c471670) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c471670) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6b2d4ab4430, count: -15