From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 375082472BD for ; Mon, 13 Oct 2025 19:28:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760383713; cv=none; b=cUUy4NPAfvm5zUT1fHofQrrZ9ARdtT9JtQlr2DanNyyd4aEpJ0vtPQ/63A9LLi1RGTioVU0X2iL7MWE2lYWPJLMMnMD/VQz0GLpkqcpvuOhTp1QxA/1cH75s18vHw41mS/TkFTC/gF9OaiqztSU/YEhAv4nWzME3Iw5RUjdm0m8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760383713; c=relaxed/simple; bh=QHosd+eotXOFw25ylcXziVznlHoMmn5Su5tVUZoDZjI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sxP9vVbacUhOErxiwkscyBeDQX5tvwgCGDT7lH+1K/ys80MuTvmr0pCchhC86ZrilmGNN1U6JL0J7FVZJDAe/AQkp+NanbyiO0M8udHrjfkQM/G5cREiYU2+SrxllXOH8g61CK8mbsV5ZZaSZwTYyv1TfQdJgdfw4Zc7I0ZsQO8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nnP4fbXm; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="nnP4fbXm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 298A6C4CEF8; Mon, 13 Oct 2025 19:28:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760383712; bh=QHosd+eotXOFw25ylcXziVznlHoMmn5Su5tVUZoDZjI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nnP4fbXmwXQH6pceJx/tkYRDOAGzKFv+3avGVKHEPVNX/O/U8PJzticQ81c5XPoY5 5s/agfmZN/6ETqFdUQnnA+SbyPCewol1lS2UuM4Aspe8eVXT0uzkeXW4kD0bSh3PLV oMLKwGrSgZ1Vh8JrkpKmQw4OHKiacGyiWf0TxCHE3sNVF9vkJ1fVUqdYiEDf6xLVet 8tCRodtxK0i9+F6hxZHnB7JR8v+4IVKeKXZz7yxd2X7NUgqgcWjGBXZpKgo0F/13Kt TWo7ArZubchwSGKEUTNIlcLUgmKPJzTRV7t1FxEiONf/1yXFvkJvwn2avie7x6jSqH n+qX1fD9sdQug== From: Sasha Levin To: stable@vger.kernel.org Cc: Ma Ke , Dmitry Baryshkov , Mark Brown , Sasha Levin Subject: [PATCH 5.15.y 2/2] ASoC: wcd934x: fix error handling in wcd934x_codec_parse_data() Date: Mon, 13 Oct 2025 15:28:29 -0400 Message-ID: <20251013192829.3566355-2-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251013192829.3566355-1-sashal@kernel.org> References: <2025101305-until-selector-fc19@gregkh> <20251013192829.3566355-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Ma Ke [ Upstream commit 4e65bda8273c938039403144730923e77916a3d7 ] wcd934x_codec_parse_data() contains a device reference count leak in of_slim_get_device() where device_find_child() increases the reference count of the device but this reference is not properly decreased in the success path. Add put_device() in wcd934x_codec_parse_data() and add devm_add_action_or_reset() in the probe function, which ensures that the reference count of the device is correctly managed. Memory leak in regmap_init_slimbus() as the allocated regmap is not released when the device is removed. Using devm_regmap_init_slimbus() instead of regmap_init_slimbus() to ensure automatic regmap cleanup on device removal. Calling path: of_slim_get_device() -> of_find_slim_device() -> device_find_child(). As comment of device_find_child() says, 'NOTE: you will need to drop the reference with put_device() after use.'. Found by code review. Cc: stable@vger.kernel.org Fixes: a61f3b4f476e ("ASoC: wcd934x: add support to wcd9340/wcd9341 codec") Signed-off-by: Ma Ke Reviewed-by: Dmitry Baryshkov Link: https://patch.msgid.link/20250923065212.26660-1-make24@iscas.ac.cn Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/codecs/wcd934x.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/sound/soc/codecs/wcd934x.c b/sound/soc/codecs/wcd934x.c index 0fcd2b80476f7..440b6a40ba605 100644 --- a/sound/soc/codecs/wcd934x.c +++ b/sound/soc/codecs/wcd934x.c @@ -5863,6 +5863,13 @@ static const struct snd_soc_component_driver wcd934x_component_drv = { .set_jack = wcd934x_codec_set_jack, }; +static void wcd934x_put_device_action(void *data) +{ + struct device *dev = data; + + put_device(dev); +} + static int wcd934x_codec_parse_data(struct wcd934x_codec *wcd) { struct device *dev = &wcd->sdev->dev; @@ -5883,11 +5890,13 @@ static int wcd934x_codec_parse_data(struct wcd934x_codec *wcd) } slim_get_logical_addr(wcd->sidev); - wcd->if_regmap = regmap_init_slimbus(wcd->sidev, + wcd->if_regmap = devm_regmap_init_slimbus(wcd->sidev, &wcd934x_ifc_regmap_config); - if (IS_ERR(wcd->if_regmap)) + if (IS_ERR(wcd->if_regmap)) { + put_device(&wcd->sidev->dev); return dev_err_probe(dev, PTR_ERR(wcd->if_regmap), "Failed to allocate ifc register map\n"); + } of_property_read_u32(dev->parent->of_node, "qcom,dmic-sample-rate", &wcd->dmic_sample_rate); @@ -5931,6 +5940,10 @@ static int wcd934x_codec_probe(struct platform_device *pdev) return ret; } + ret = devm_add_action_or_reset(dev, wcd934x_put_device_action, &wcd->sidev->dev); + if (ret) + return ret; + /* set default rate 9P6MHz */ regmap_update_bits(wcd->regmap, WCD934X_CODEC_RPM_CLK_MCLK_CFG, WCD934X_CODEC_RPM_CLK_MCLK_CFG_MCLK_MASK, -- 2.51.0