diff --git a/pkg/hostman/guestman/guesttasks.go b/pkg/hostman/guestman/guesttasks.go
index e457975efa..59e0c1dcc8 100644
--- a/pkg/hostman/guestman/guesttasks.go
+++ b/pkg/hostman/guestman/guesttasks.go
@@ -287,6 +287,9 @@ func (d *SGuestDiskSyncTask) changeCdromContent(cdName string) {
 }
 
 func (d *SGuestDiskSyncTask) OnChangeCdromContentSucc(results string) {
+	if d.guest.Desc.Cdrom == nil {
+		d.guest.Desc.Cdrom = new(desc.SGuestCdrom)
+	}
 	d.guest.Desc.Cdrom.Path = *d.cdrom
 	d.cdrom = nil
 	d.syncDisksConf()
diff --git a/pkg/hostman/guestman/pci.go b/pkg/hostman/guestman/pci.go
index 5429b911fb..a08dd0b0a1 100644
--- a/pkg/hostman/guestman/pci.go
+++ b/pkg/hostman/guestman/pci.go
@@ -299,7 +299,6 @@ func (s *SKVMGuestInstance) initIsolatedDevices(pciRoot, pciBridge *desc.PCICont
 func (s *SKVMGuestInstance) initCdromDesc() {
 	if s.Desc.Cdrom == nil {
 		s.Desc.Cdrom = new(desc.SGuestCdrom)
-		return
 	}
 
 	s.archMan.GenerateCdromDesc(s.getOsname(), s.Desc.Cdrom)