qemu: fix use after free

Detected by Coverity.

* src/qemu/qemu_hotplug.c (qemuDomainAttachHostDevice): Avoid
double free of usb on failure.
(cherry picked from commit 665c8cdecc2d91a83f08a6ec95531b0de57c0e0a)

diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 62de67c9f9f6b91b246c369ea161677e3b8285a2..fcc7c0ff7db146ddcda4f87cc3ca46c773685fc4 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;
         }