uvm_fault(fffffd806b9b75d0,f1f83b8c000,0,4) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff80003c45b590,f1f83b8ce40) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c45b590) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7b978a77dd30, 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(fffffd806b880330,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806b880318,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806b880318,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd8062da1cf8,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527
vn_lock(fffffd8062da1cf8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff8000367f9d50) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1
namei(ffff8000367f9d50) at namei+0x7ca sys/kern/vfs_lookup.c:250
unp_connect(ffff800010fd31b8,fffffd80679f5f00,ffff800036bfd4e0) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872
uipc_dgram_send(ffff800010fd31b8,fffffd806ecccd00,fffffd80679f5f00,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609
sosend(ffff800010fd31b8,fffffd80679f5f00,ffff8000367f9fd8,0,0,8) at sosend+0x804 sys/kern/uipc_socket.c:-1
sendit(ffff800036bfd4e0,5,ffff8000367fa158,8,ffff8000367fa210) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785
sys_sendmsg(ffff800036bfd4e0,ffff8000367fa2c0,ffff8000367fa210) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603
syscall(ffff8000367fa2c0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000367fa2c0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xbdbd1275bb0, count: -15