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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DF661ECAAA1 for ; Sun, 23 Oct 2022 16:07:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230321AbiJWQHG (ORCPT ); Sun, 23 Oct 2022 12:07:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230180AbiJWQHF (ORCPT ); Sun, 23 Oct 2022 12:07:05 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 36F7B5BC93 for ; Sun, 23 Oct 2022 09:07:04 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id E1F37B80DB2 for ; Sun, 23 Oct 2022 16:07:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1CF52C433C1; Sun, 23 Oct 2022 16:07:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666541221; bh=g/mLngcdlsKK8+wUlmzX72H4bD9737qt8FgPdn6qnCY=; h=Subject:To:From:Date:From; b=tRHRpyCOb1vm+C/FqhbaNuQS2ymC6qwKyBdtM7PT4NoTuexDifMWRX05qsX/cb2i7 dSBIOOLQzfGXTQ10LoRtnS4PaUiYOEoUgWROm5MFpd2BqveTYA9/hyxOHCQTwA2Z3x KXZTPU/Gkghwx/TRycgIrUqVsGhL7w5WC1lGrMUY= Subject: patch "iio: adxl367: Fix unsafe buffer attributes" added to char-misc-linus To: mazziesaccount@gmail.com, Jonathan.Cameron@huawei.com, Stable@vger.kernel.org From: Date: Sun, 23 Oct 2022 18:06:28 +0200 Message-ID: <166654118822474@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org This is a note to let you know that I've just added the patch titled iio: adxl367: Fix unsafe buffer attributes to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From 5e23b33d1e84f04c80da6f1d89cbb3d3a3f81e01 Mon Sep 17 00:00:00 2001 From: Matti Vaittinen Date: Mon, 3 Oct 2022 11:10:29 +0300 Subject: iio: adxl367: Fix unsafe buffer attributes The devm_iio_kfifo_buffer_setup_ext() was changed by commit 15097c7a1adc ("iio: buffer: wrap all buffer attributes into iio_dev_attr") to silently expect that all attributes given in buffer_attrs array are device-attributes. This expectation was not forced by the API - and some drivers did register attributes created by IIO_CONST_ATTR(). The added attribute "wrapping" does not copy the pointer to stored string constant and when the sysfs file is read the kernel will access to invalid location. Change the IIO_CONST_ATTRs from the driver to IIO_DEVICE_ATTR in order to prevent the invalid memory access. Signed-off-by: Matti Vaittinen Fixes: 15097c7a1adc ("iio: buffer: wrap all buffer attributes into iio_dev_attr") Cc: Link: https://lore.kernel.org/r/2e2d9ec34fb1df8ab8e2749199822db8cc91d302.1664782676.git.mazziesaccount@gmail.com Signed-off-by: Jonathan Cameron --- drivers/iio/accel/adxl367.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/drivers/iio/accel/adxl367.c b/drivers/iio/accel/adxl367.c index 47feb375b70b..7c7d78040793 100644 --- a/drivers/iio/accel/adxl367.c +++ b/drivers/iio/accel/adxl367.c @@ -1185,17 +1185,30 @@ static ssize_t adxl367_get_fifo_watermark(struct device *dev, return sysfs_emit(buf, "%d\n", fifo_watermark); } -static IIO_CONST_ATTR(hwfifo_watermark_min, "1"); -static IIO_CONST_ATTR(hwfifo_watermark_max, - __stringify(ADXL367_FIFO_MAX_WATERMARK)); +static ssize_t hwfifo_watermark_min_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sysfs_emit(buf, "%s\n", "1"); +} + +static ssize_t hwfifo_watermark_max_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sysfs_emit(buf, "%s\n", __stringify(ADXL367_FIFO_MAX_WATERMARK)); +} + +static IIO_DEVICE_ATTR_RO(hwfifo_watermark_min, 0); +static IIO_DEVICE_ATTR_RO(hwfifo_watermark_max, 0); static IIO_DEVICE_ATTR(hwfifo_watermark, 0444, adxl367_get_fifo_watermark, NULL, 0); static IIO_DEVICE_ATTR(hwfifo_enabled, 0444, adxl367_get_fifo_enabled, NULL, 0); static const struct attribute *adxl367_fifo_attributes[] = { - &iio_const_attr_hwfifo_watermark_min.dev_attr.attr, - &iio_const_attr_hwfifo_watermark_max.dev_attr.attr, + &iio_dev_attr_hwfifo_watermark_min.dev_attr.attr, + &iio_dev_attr_hwfifo_watermark_max.dev_attr.attr, &iio_dev_attr_hwfifo_watermark.dev_attr.attr, &iio_dev_attr_hwfifo_enabled.dev_attr.attr, NULL, -- 2.38.1