[PATCH]lxc: make sure root wouldn't be null

[Chen Hanxiao <chenhanxiao@xxxxxxxxxxxxxx>]

From: Chen Hanxiao <chenhanxiao@xxxxxxxxxxxxxx>

virDomainGetRootFilesystem may return null.
We should take care of it.

Signed-off-by: Chen Hanxiao <chenhanxiao@xxxxxxxxxxxxxx>
---
 src/lxc/lxc_container.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/lxc/lxc_container.c b/src/lxc/lxc_container.c
index 255c711..e8f7a75 100644
--- a/src/lxc/lxc_container.c
+++ b/src/lxc/lxc_container.c
@@ -1829,7 +1829,8 @@ static int lxcContainerChild(void *data)
     if (lxcContainerSetID(vmDef) < 0)
         goto cleanup;
 
-    root = virDomainGetRootFilesystem(vmDef);
+    if (!(root = virDomainGetRootFilesystem(vmDef)))
+        goto cleanup;
 
     if (argv->nttyPaths) {
         const char *tty = argv->ttyPaths[0];
-- 
1.8.2.1

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