[libvirt] [PATCH] Fix a reference leak for node devices.

[Chris Lalancette]

There was one major, and a few minor bugs having to do with
the reference counting of node devices in daemon/remote.c
The major bug was that remoteDispatchNodeDeviceListCaps()
was completely failing to unreference node devices; this
would lead to many open file descriptors, which would eventually
fail.

The minor bugs were along the same lines, but were in rarely
used error paths.  Still, they should be corrected.

Signed-off-by: Chris Lalancette <clalance at redhat.com>
---
 daemon/remote.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/daemon/remote.c b/daemon/remote.c
index 91faa9a..ec5f85b 100644
--- a/daemon/remote.c
+++ b/daemon/remote.c
@@ -5012,11 +5012,13 @@ remoteDispatchNodeDeviceGetParent (struct qemud_server *server ATTRIBUTE_UNUSED,
         /* remoteDispatchClientRequest will free this. */
         char **parent_p;
         if (VIR_ALLOC(parent_p) < 0) {
+            virNodeDeviceFree(dev);
             remoteDispatchOOMError(rerr);
             return -1;
         }
         *parent_p = strdup(parent);
         if (*parent_p == NULL) {
+            virNodeDeviceFree(dev);
             remoteDispatchOOMError(rerr);
             return -1;
         }
@@ -5048,6 +5050,7 @@ remoteDispatchNodeDeviceNumOfCaps (struct qemud_server *server ATTRIBUTE_UNUSED,
 
     ret->num = virNodeDeviceNumOfCaps(dev);
     if (ret->num < 0) {
+        virNodeDeviceFree(dev);
         remoteDispatchConnError(rerr, conn);
         return -1;
     }
@@ -5076,6 +5079,7 @@ remoteDispatchNodeDeviceListCaps (struct qemud_server *server ATTRIBUTE_UNUSED,
     }
 
     if (args->maxnames > REMOTE_NODE_DEVICE_NAME_LIST_MAX) {
+        virNodeDeviceFree(dev);
         remoteDispatchFormatError(rerr,
                                   "%s", _("maxnames > REMOTE_NODE_DEVICE_NAME_LIST_MAX"));
         return -1;
@@ -5083,6 +5087,7 @@ remoteDispatchNodeDeviceListCaps (struct qemud_server *server ATTRIBUTE_UNUSED,
 
     /* Allocate return buffer. */
     if (VIR_ALLOC_N(ret->names.names_val, args->maxnames) < 0) {
+        virNodeDeviceFree(dev);
         remoteDispatchOOMError(rerr);
         return -1;
     }
@@ -5091,11 +5096,13 @@ remoteDispatchNodeDeviceListCaps (struct qemud_server *server ATTRIBUTE_UNUSED,
         virNodeDeviceListCaps (dev, ret->names.names_val,
                                args->maxnames);
     if (ret->names.names_len == -1) {
+        virNodeDeviceFree(dev);
         remoteDispatchConnError(rerr, conn);
         VIR_FREE(ret->names.names_val);
         return -1;
     }
 
+    virNodeDeviceFree(dev);
     return 0;
 }
 
-- 
1.6.6.1