libvirt: Increase connection reference count for callbacks

By adjusting the reference count of the connection object we
prevent races between callback function and virConnectClose.

Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
(cherry picked from commit 03a43efa86f5099d3f6df334f73961a535e488b5)

diff --git a/src/libvirt.c b/src/libvirt.c
index 4b9ea759914e429ed41a6a66df32d6f14340b60f..e9aff8aa48a2b48fe879c7a47384ec69a5306a87 100644 (file)
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -20186,6 +20186,8 @@ int virConnectRegisterCloseCallback(virConnectPtr conn,
         return -1;
     }
 
+    virObjectRef(conn);
+
     virMutexLock(&conn->lock);
 
     virCheckNonNullArgGoto(cb, error);
@@ -20206,6 +20208,7 @@ int virConnectRegisterCloseCallback(virConnectPtr conn,
 
 error:
     virMutexUnlock(&conn->lock);
+    virObjectUnref(conn);
     virDispatchError(NULL);
     return -1;
 }
@@ -20255,6 +20258,8 @@ int virConnectUnregisterCloseCallback(virConnectPtr conn,
 
     virMutexUnlock(&conn->lock);
 
+    virObjectUnref(conn);
+
     return 0;
 
 error: