crypto: qat - use kfree_sensitive instead of memset/kfree()

Use kfree_sensitive() instead of memset() and kfree().
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Acked-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/intel/qat/qat_common/qat_compression.c

@@ -234,8 +234,7 @@ static void qat_free_dc_data(struct adf_accel_dev *accel_dev)
 
 	dma_unmap_single(dev, dc_data->ovf_buff_p, dc_data->ovf_buff_sz,
 			 DMA_FROM_DEVICE);
-	memset(dc_data->ovf_buff, 0, dc_data->ovf_buff_sz);
-	kfree(dc_data->ovf_buff);
+	kfree_sensitive(dc_data->ovf_buff);
 	devm_kfree(dev, dc_data);
 	accel_dev->dc_data = NULL;
 }