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=-18.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 3427AC433B4 for ; Wed, 7 Apr 2021 08:12:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E8EDC61363 for ; Wed, 7 Apr 2021 08:12:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244592AbhDGIMN (ORCPT ); Wed, 7 Apr 2021 04:12:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:42996 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233700AbhDGIMM (ORCPT ); Wed, 7 Apr 2021 04:12:12 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E14456139C; Wed, 7 Apr 2021 08:12:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617783123; bh=d9jru4oyoueghnVXUD1SAIdjqN8ghuCPqGiky6XdqWU=; h=Subject:To:From:Date:From; b=0u8xfaPc4MM+9xjixDd1vOMHm150bHHOe6cRF9d+CRB5fiMUaVb1tYyEQk6wBUXY5 Jl9CReZauyQgcHru3OptMMXxIP+pPb9zDs0/wWaIJLl0gDXfjP177yUzclxUGMyGGH GlGkN7xlJ71JLXsRXWpx1f+L9TkiJbECSuQy2w18= Subject: patch "iio: sx9310: Fix access to variable DT array" added to staging-testing To: gwendal@chromium.org, Jonathan.Cameron@huawei.com, andy.shevchenko@gmail.com, stable@vger.kernel.org From: Date: Wed, 07 Apr 2021 10:09:20 +0200 Message-ID: <161778296099124@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: sx9310: Fix access to variable DT array to my staging git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git in the staging-testing 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 be merged to the staging-next branch sometime soon, after it passes testing, and the merge window is open. If you have any questions about this process, please let me know. >From 6f0078ae704d94b1a93e5f3d0a44cf3d8090fa91 Mon Sep 17 00:00:00 2001 From: Gwendal Grignou Date: Fri, 26 Mar 2021 11:46:02 -0700 Subject: iio: sx9310: Fix access to variable DT array With the current code, we want to read 4 entries from DT array "semtech,combined-sensors". If there are less, we silently fail as of_property_read_u32_array() returns -EOVERFLOW. First count the number of entries and if between 1 and 4, collect the content of the array. Fixes: 5b19ca2c78a0 ("iio: sx9310: Set various settings from DT") Signed-off-by: Gwendal Grignou Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20210326184603.251683-2-gwendal@chromium.org Cc: Signed-off-by: Jonathan Cameron --- drivers/iio/proximity/sx9310.c | 40 ++++++++++++++++++++++++---------- 1 file changed, 28 insertions(+), 12 deletions(-) diff --git a/drivers/iio/proximity/sx9310.c b/drivers/iio/proximity/sx9310.c index 394c2afe0f23..289c76bb3b02 100644 --- a/drivers/iio/proximity/sx9310.c +++ b/drivers/iio/proximity/sx9310.c @@ -1213,17 +1213,17 @@ static int sx9310_init_compensation(struct iio_dev *indio_dev) } static const struct sx9310_reg_default * -sx9310_get_default_reg(struct sx9310_data *data, int i, +sx9310_get_default_reg(struct sx9310_data *data, int idx, struct sx9310_reg_default *reg_def) { - int ret; const struct device_node *np = data->client->dev.of_node; - u32 combined[SX9310_NUM_CHANNELS] = { 4, 4, 4, 4 }; + u32 combined[SX9310_NUM_CHANNELS]; + u32 start = 0, raw = 0, pos = 0; unsigned long comb_mask = 0; + int ret, i, count; const char *res; - u32 start = 0, raw = 0, pos = 0; - memcpy(reg_def, &sx9310_default_regs[i], sizeof(*reg_def)); + memcpy(reg_def, &sx9310_default_regs[idx], sizeof(*reg_def)); if (!np) return reg_def; @@ -1234,15 +1234,31 @@ sx9310_get_default_reg(struct sx9310_data *data, int i, reg_def->def |= SX9310_REG_PROX_CTRL2_SHIELDEN_GROUND; } - reg_def->def &= ~SX9310_REG_PROX_CTRL2_COMBMODE_MASK; - of_property_read_u32_array(np, "semtech,combined-sensors", - combined, ARRAY_SIZE(combined)); - for (i = 0; i < ARRAY_SIZE(combined); i++) { - if (combined[i] <= SX9310_NUM_CHANNELS) - comb_mask |= BIT(combined[i]); + count = of_property_count_elems_of_size(np, "semtech,combined-sensors", + sizeof(u32)); + if (count > 0 && count <= ARRAY_SIZE(combined)) { + ret = of_property_read_u32_array(np, "semtech,combined-sensors", + combined, count); + if (ret) + break; + } else { + /* + * Either the property does not exist in the DT or the + * number of entries is incorrect. + */ + break; + } + for (i = 0; i < count; i++) { + if (combined[i] >= SX9310_NUM_CHANNELS) { + /* Invalid sensor (invalid DT). */ + break; + } + comb_mask |= BIT(combined[i]); } + if (i < count) + break; - comb_mask &= 0xf; + reg_def->def &= ~SX9310_REG_PROX_CTRL2_COMBMODE_MASK; if (comb_mask == (BIT(3) | BIT(2) | BIT(1) | BIT(0))) reg_def->def |= SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1_CS2_CS3; else if (comb_mask == (BIT(1) | BIT(2))) -- 2.31.1