qemu: fix use after free

Detected by Coverity.

* src/qemu/qemu_hotplug.c (qemuDomainAttachHostDevice): Avoid
double free of usb on failure.

diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index ba841e92697ca743229bdee43a7352c53dbf6369..ceffe22846f0dce9a69963183a6a4d5071f139e2 100644 (file)
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -1170,6 +1170,7 @@ int qemuDomainAttachHostDevice(struct qemud_driver *driver,
 
         if (usbDeviceListAdd(list, usb) < 0) {
             usbFreeDevice(usb);
+            usb = NULL:
             goto cleanup;
         }