+ virsh start RHEL
Domain 'RHEL' started
+ sleep 40
+ virsh attach-device RHEL hostdev.xml
error: Disconnected from qemu:///system due to end of file
error: Failed to attach device from hostdev.xml
error: End of file while reading data: Input/output error
+ virsh destroy RHEL
error: Failed to destroy domain 'RHEL'
error: Requested operation is not valid: domain is not running

#0  0x00007f7c40501703 in qemuDomainAttachHostPCIDevice (driver=0x7f7bfc006070, vm=0x7f7bfc3f22e0, hostdev=<optimized out>) at ../src/qemu/qemu_hotplug.c:1652
1652        if ((ret = qemuFDPassDirectTransferMonitor(hostdevPriv->vfioDeviceFd, priv->mon)) < 0)
[Current thread is 1 (Thread 0x7f7c40ffc6c0 (LWP 8929))]
(gdb) bt
#0  0x00007f7c40501703 in qemuDomainAttachHostPCIDevice (driver=0x7f7bfc006070, vm=0x7f7bfc3f22e0, hostdev=<optimized out>) at ../src/qemu/qemu_hotplug.c:1652
#1  qemuDomainAttachHostDevice (driver=0x7f7bfc006070, vm=0x7f7bfc3f22e0, hostdev=<optimized out>) at ../src/qemu/qemu_hotplug.c:2902
#2  0x00007f7c404ff433 in qemuDomainAttachNetDevice (driver=0x7f7bfc006070, vm=0x7f7bfc3f22e0, net=<optimized out>) at ../src/qemu/qemu_hotplug.c:1219
#3  0x00007f7c405032f7 in qemuDomainAttachDeviceLive (vm=0x7f7bfc3f22e0, dev=0x7f7c2c03d5d0, driver=0x7f7bfc006070) at ../src/qemu/qemu_hotplug.c:3484
#4  0x00007f7c404dc988 in qemuDomainAttachDeviceLiveAndConfig (vm=0x7f7bfc3f22e0, driver=0x7f7bfc006070, xml=<optimized out>, flags=<optimized out>)
    at ../src/qemu/qemu_driver.c:7387
#5  qemuDomainAttachDeviceFlags (dom=<optimized out>, xml=<optimized out>, flags=<optimized out>) at ../src/qemu/qemu_driver.c:7435
#6  0x00007f7c523277f4 in virDomainAttachDevice (domain=domain@entry=0x7f7c2c002a70, 
    xml=0x7f7c2c04c410 "    <interface type='hostdev' managed='yes'>\n      <mac address='00:11:22:33:44:55'/>\n      <source>\n        <address type='pci' domain='0x0000' bus='0x17' slot='0x11' function='0x0'/>\n      </source>"...) at ../src/libvirt-domain.c:8951
#7  0x000055db676a4626 in remoteDispatchDomainAttachDevice (server=0x55db79e85ab0, msg=0x55db79e88180, client=<optimized out>, rerr=0x7f7c40ffb9b0, 
    args=0x7f7c2c004ff0) at src/remote/remote_daemon_dispatch_stubs.h:3763
#8  remoteDispatchDomainAttachDeviceHelper (server=0x55db79e85ab0, client=<optimized out>, msg=0x55db79e88180, rerr=0x7f7c40ffb9b0, args=0x7f7c2c004ff0, 
    ret=0x0) at src/remote/remote_daemon_dispatch_stubs.h:3742
#9  0x00007f7c52210a69 in virNetServerProgramDispatchCall (prog=0x55db79e71770, server=0x55db79e85ab0, client=0x55db79e90d10, msg=0x55db79e88180)
    at ../src/rpc/virnetserverprogram.c:423
#10 virNetServerProgramDispatch (prog=0x55db79e71770, server=server@entry=0x55db79e85ab0, client=client@entry=0x55db79e90d10, msg=msg@entry=0x55db79e88180)
    at ../src/rpc/virnetserverprogram.c:299
#11 0x00007f7c52211062 in virNetServerProcessMsg (srv=srv@entry=0x55db79e85ab0, client=0x55db79e90d10, prog=<optimized out>, msg=0x55db79e88180)
    at ../src/rpc/virnetserver.c:135
#12 0x00007f7c52211171 in virNetServerHandleJob (jobOpaque=0x55db79e90cc0, opaque=0x55db79e85ab0) at ../src/rpc/virnetserver.c:155
#13 0x00007f7c52144b55 in virThreadPoolWorker (opaque=<optimized out>) at ../src/util/virthreadpool.c:164
#14 0x00007f7c521435b8 in virThreadHelper (data=<optimized out>) at ../src/util/virthread.c:256
#15 0x00007f7c51ad49a8 in start_thread (arg=<optimized out>) at pthread_create.c:448
#16 0x00007f7c51b4533c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78