From eebf932e9418b8a626488ced40294e4f5d580e49 Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering@redhat.com>
Date: Wed, 16 Dec 2009 14:15:50 +0100
Subject: [PATCH] qemu_driver.c: avoid NULL dereference upon disk-op failure

* src/qemu/qemu_driver.c (qemudDomainAttachDevice): Call
virCgroupDenyDevicePath only if cgroup is non-NULL.
---
 src/qemu/qemu_driver.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index a6a1a5ab7c..4639478abc 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -5491,7 +5491,7 @@ static int qemudDomainAttachDevice(virDomainPtr dom,
                              virDomainDiskDeviceTypeToString(dev->data.disk->device));
             /* Fallthrough */
         }
-        if (ret != 0) {
+        if (ret != 0 && cgroup) {
             virCgroupDenyDevicePath(cgroup,
                                     dev->data.disk->src);
         }
-- 
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