From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F3E62C07E99 for ; Mon, 12 Jul 2021 08:54:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DBE11600D1 for ; Mon, 12 Jul 2021 08:54:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1379332AbhGLI5V (ORCPT ); Mon, 12 Jul 2021 04:57:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:56658 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353737AbhGLICt (ORCPT ); Mon, 12 Jul 2021 04:02:49 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 707BC61D02; Mon, 12 Jul 2021 07:57:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626076628; bh=O4BBMqK+kD5FFoG/NqaxRJbFS2HDj0SnTgGHmSYxk8c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YxZaCnvkVmyYkpaPOtWeV3lorkNKnse7DmhKCkEdaxznchA8UlBlo2/My1Fz7QKjV uJV1L7EdJQGzIKJpD761ECO0Mm4IXzFloESWD8LDcLR1Po1TLrPOJNfl0mlhtm9v73 kQ5Dk+XYS3GuB4DJ7IeHNK7XtRNatrdlvrIcW1To= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jonathan Cameron , Parthiban Nallathambi , =?UTF-8?q?Nuno=20S=C3=A1?= , Sasha Levin Subject: [PATCH 5.13 725/800] iio: light: vcnl4035: Fix buffer alignment in iio_push_to_buffers_with_timestamp() Date: Mon, 12 Jul 2021 08:12:28 +0200 Message-Id: <20210712061043.896020991@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060912.995381202@linuxfoundation.org> References: <20210712060912.995381202@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jonathan Cameron [ Upstream commit ec90b52c07c0403a6db60d752484ec08d605ead0 ] Add __aligned(8) to ensure the buffer passed to iio_push_to_buffers_with_timestamp() is suitable for the naturally aligned timestamp that will be inserted. Here an explicit structure is not used, because the holes would necessitate the addition of an explict memset(), to avoid a potential kernel data leak, making for a less minimal fix. Fixes: 55707294c4eb ("iio: light: Add support for vishay vcnl4035") Signed-off-by: Jonathan Cameron Cc: Parthiban Nallathambi Reviewed-by: Nuno Sá Link: https://lore.kernel.org/r/20210613152301.571002-8-jic23@kernel.org Signed-off-by: Sasha Levin --- drivers/iio/light/vcnl4035.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iio/light/vcnl4035.c b/drivers/iio/light/vcnl4035.c index ae87740d9cef..bc0777411712 100644 --- a/drivers/iio/light/vcnl4035.c +++ b/drivers/iio/light/vcnl4035.c @@ -102,7 +102,8 @@ static irqreturn_t vcnl4035_trigger_consumer_handler(int irq, void *p) struct iio_poll_func *pf = p; struct iio_dev *indio_dev = pf->indio_dev; struct vcnl4035_data *data = iio_priv(indio_dev); - u8 buffer[ALIGN(sizeof(u16), sizeof(s64)) + sizeof(s64)]; + /* Ensure naturally aligned timestamp */ + u8 buffer[ALIGN(sizeof(u16), sizeof(s64)) + sizeof(s64)] __aligned(8); int ret; ret = regmap_read(data->regmap, VCNL4035_ALS_DATA, (int *)buffer); -- 2.30.2