diff --git a/modules/cas_cache/layer_cache_management.c b/modules/cas_cache/layer_cache_management.c
index 84d01b5..7ee0bd4 100644
--- a/modules/cas_cache/layer_cache_management.c
+++ b/modules/cas_cache/layer_cache_management.c
@@ -1836,7 +1836,7 @@ static void init_instance_complete(struct _cache_mngt_attach_context *ctx,
 	/* Set other back information */
 	name = block_dev_get_elevator_name(
 			casdsk_disk_get_queue(bd_cache_obj->dsk));
-	if (name)
+	if (name && ctx->cmd)
 		strlcpy(ctx->cmd->cache_elevator,
 				name, MAX_ELEVATOR_NAME);
 }
@@ -1848,6 +1848,7 @@ static void cache_start_finalize(struct work_struct *work)
 {
 	struct cache_priv *cache_priv =
 		container_of(work, struct cache_priv, start_worker);
+	struct task_struct *rollback_thread;
 	struct _cache_mngt_attach_context *ctx = cache_priv->attach_context;
 	int result;
 	ocf_cache_t cache = ctx->cache;
@@ -1870,6 +1871,8 @@ static void cache_start_finalize(struct work_struct *work)
 
 	init_instance_complete(ctx, cache);
 
+	rollback_thread = ctx->rollback_thread;
+
 	if (_cache_mngt_async_callee_set_result(&ctx->async, 0)) {
 		/* caller interrupted */
 		ctx->ocf_start_error = 0;
@@ -1878,7 +1881,7 @@ static void cache_start_finalize(struct work_struct *work)
 		return;
 	}
 
-	kthread_stop(ctx->rollback_thread);
+	kthread_stop(rollback_thread);
 
 	ocf_mngt_cache_unlock(cache);
 }
@@ -1890,7 +1893,7 @@ static void _cache_mngt_start_complete(ocf_cache_t cache, void *priv, int error)
 	int caller_status = _cache_mngt_async_callee_peek_result(&ctx->async);
 
 	if (caller_status || error) {
-		if (error == -OCF_ERR_NO_FREE_RAM) {
+		if (error == -OCF_ERR_NO_FREE_RAM && ctx->cmd) {
 			ocf_mngt_get_ram_needed(cache, ctx->device_cfg,
 					&ctx->cmd->min_free_ram);
 		} else if (caller_status == -KCAS_ERR_WAITING_INTERRUPTED) {