From 9649b0a8b412220bd7696e0f200ab4c435302c18 Mon Sep 17 00:00:00 2001
From: Eric Blake <eblake@redhat.com>
Date: Tue, 31 Jul 2012 08:05:14 -0600
Subject: [PATCH] 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)
---
 src/qemu/qemu_hotplug.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 62de67c9f9..fcc7c0ff7d 100644
--- 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;
         }