libxl: qmp_init_handler can return NULL

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>

diff --git a/tools/libxl/libxl_qmp.c b/tools/libxl/libxl_qmp.c
index 6484f5eb13b06259e7ac27f16175626e1ed5533d..965c5074f1adcacebfb455f984a72053eb26c178 100644 (file)
--- a/tools/libxl/libxl_qmp.c
+++ b/tools/libxl/libxl_qmp.c
@@ -694,6 +694,7 @@ libxl__qmp_handler *libxl__qmp_initialize(libxl__gc *gc, uint32_t domid)
     char *qmp_socket;
 
     qmp = qmp_init_handler(gc, domid);
+    if (!qmp) return NULL;
 
     qmp_socket = GCSPRINTF("%s/qmp-libxl-%d", libxl__run_dir_path(), domid);
     if ((ret = qmp_open(qmp, qmp_socket, QMP_SOCKET_CONNECT_TIMEOUT)) < 0) {