uvm_fault(fffffd806c6f49a0,ad436a000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650
upageflttrap(ffff80003c3eaba0,ad436a000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c3eaba0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x780843cdeeb0, count: -12
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(fffffd806c66a0c0,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806c66a0a8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806c66a0a8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd806ac99978,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd806ac99978,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:576
vfs_lookup(ffff800038bbf830) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1
namei(ffff800038bbf830) at namei+0x7ca sys/kern/vfs_lookup.c:250
unp_connect(ffff80000160cec8,fffffd806f154700,ffff8000fffea020) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872
uipc_dgram_send(ffff80000160cec8,fffffd806d4e8000,fffffd806f154700,fffffd806f0da800) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609
sosend(ffff80000160cec8,fffffd806f154700,ffff800038bbfab8,0,fffffd806f0da800,0) at sosend+0x804 sys/kern/uipc_socket.c:-1
sendit(ffff8000fffea020,a,ffff800038bbfc38,0,ffff800038bbfcf0) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785
sys_sendmsg(ffff8000fffea020,ffff800038bbfda0,ffff800038bbfcf0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603
syscall(ffff800038bbfda0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800038bbfda0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x336a500ddb0, count: -15