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LU-2217 build: fix 'NULL pointer dereference' errors
[fs/lustre-release.git] / lnet / selftest / conctl.c
index 5d3a3fd..3b7a96e 100644 (file)
@@ -671,46 +671,47 @@ int
 lst_stat_query_ioctl(lstio_stat_args_t *args)
 {
         int             rc;
-        char           *name;
+       char           *name = NULL;
 
         /* TODO: not finished */
         if (args->lstio_sta_key != console_session.ses_key)
                 return -EACCES;
 
-        if (args->lstio_sta_resultp == NULL ||
-            (args->lstio_sta_namep  == NULL &&
-             args->lstio_sta_idsp   == NULL) ||
-            args->lstio_sta_nmlen <= 0 ||
-            args->lstio_sta_nmlen > LST_NAME_SIZE)
-                return -EINVAL;
-
-        if (args->lstio_sta_idsp != NULL &&
-            args->lstio_sta_count <= 0)
-                return -EINVAL;
-
-        LIBCFS_ALLOC(name, args->lstio_sta_nmlen + 1);
-        if (name == NULL)
-                return -ENOMEM;
+       if (args->lstio_sta_resultp == NULL)
+               return -EINVAL;
 
-       if (copy_from_user(name, args->lstio_sta_namep,
-                               args->lstio_sta_nmlen)) {
-                LIBCFS_FREE(name, args->lstio_sta_nmlen + 1);
-                return -EFAULT;
-        }
+       if (args->lstio_sta_idsp != NULL) {
+               if (args->lstio_sta_count <= 0)
+                       return -EINVAL;
 
-        if (args->lstio_sta_idsp == NULL) {
-                rc = lstcon_group_stat(name, args->lstio_sta_timeout,
-                                       args->lstio_sta_resultp);
-        } else {
-                rc = lstcon_nodes_stat(args->lstio_sta_count,
+               rc = lstcon_nodes_stat(args->lstio_sta_count,
                                        args->lstio_sta_idsp,
                                        args->lstio_sta_timeout,
                                        args->lstio_sta_resultp);
-        }
+       } else if (args->lstio_sta_namep != NULL) {
+               if (args->lstio_sta_nmlen <= 0 ||
+                   args->lstio_sta_nmlen > LST_NAME_SIZE)
+                       return -EINVAL;
 
-        LIBCFS_FREE(name, args->lstio_sta_nmlen + 1);
+               LIBCFS_ALLOC(name, args->lstio_sta_nmlen + 1);
+               if (name == NULL)
+                       return -ENOMEM;
 
-        return rc;
+               rc = copy_from_user(name, args->lstio_sta_namep,
+                                   args->lstio_sta_nmlen);
+               if (rc == 0)
+                       rc = lstcon_group_stat(name, args->lstio_sta_timeout,
+                                              args->lstio_sta_resultp);
+               else
+                       rc = -EFAULT;
+
+       } else {
+               rc = -EINVAL;
+       }
+
+       if (name != NULL)
+               LIBCFS_FREE(name, args->lstio_sta_nmlen + 1);
+       return rc;
 }
 
 int lst_test_add_ioctl(lstio_test_args_t *args)