From nobody Sat Nov 30 07:46:58 2024 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (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 8ED0219E98E; Wed, 11 Sep 2024 11:59:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726055966; cv=none; b=gbWdn9LGpsKLk69bXCUWv0Q9jCIuXod1/POH0dDXEzsxnL8kFJhSF+09zj3MZOmRPRl/+hLx7XvKsoE1RJ8LW4s/W1DG6uHhJw0IbUgKYFuhf7ehT7Zz/CqExZj122M2PebBo1Ad/Lx+rZZ06T6GttxziBEK/4Ng3gqLSmKUe50= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726055966; c=relaxed/simple; bh=AYWLBb8Keyuw2fUFmizNHQwBmBNVP35YDuFTaDlBHz4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kiJXwJAHbybq/IBf02BlKUGCZ5zJCxer0PMXLS6PjyKZF/CpdignJg3Fut5cpex0dct0R6ANB6bPu6fA0g1DzSlbZD/h5dCNWE62u5WGLJCokNNX2YttZMJbKPlXoDmMSo5s6FFi3TSF+ZsuAkG/NVhMBHiqSc0gE+p4hYQi1M8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=lh8UMUyR; arc=none smtp.client-ip=198.175.65.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="lh8UMUyR" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1726055965; x=1757591965; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=AYWLBb8Keyuw2fUFmizNHQwBmBNVP35YDuFTaDlBHz4=; b=lh8UMUyRpmSoQwgZ0FbkrWyeS64rzNXFmFPpcB/nxp1/Y2KLVpOdiQwS TuCLMQS/MX85JMM8YCl2x+176KUWbLU37Z5aHAZVNgUB3TZsJuwlN4FnA HCpgrX5RD2SCuQ3LSBnVJ2BsI2snWvWgNstygYgXPPyF3WWanEtOUuI95 GrtBTMr+Zn7lc8GCp/2L33LXaKXkJPfsnGckBNOzL4b/RZ31wSOMvXcmK adkmXmMpLQVfFl0YwOtREsZJ4N1PJULUoBDa61gObF0CgYE5Xjs4NgCVB AcOwAURaE1is07RMjOGF32+oFtcxr7zRKcEK5DRm3oQbggcO3to9bhWD1 g==; X-CSE-ConnectionGUID: QLGYxqJ5Q/qiSGPV0VpjVw== X-CSE-MsgGUID: vImXfTAMRDCd4armKVCeVg== X-IronPort-AV: E=McAfee;i="6700,10204,11191"; a="35417261" X-IronPort-AV: E=Sophos;i="6.10,219,1719903600"; d="scan'208";a="35417261" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Sep 2024 04:59:24 -0700 X-CSE-ConnectionGUID: eGgiJhvzSBqqYlzBuFWPXA== X-CSE-MsgGUID: jJEBzvpGS2q30vhZt/AoNA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,219,1719903600"; d="scan'208";a="67292771" Received: from bvivekan-mobl2.gar.corp.intel.com (HELO yungchua-desk.intel.com) ([10.247.118.254]) by orviesa009-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Sep 2024 04:59:22 -0700 From: Bard Liao To: linux-sound@vger.kernel.org, vkoul@kernel.org Cc: vinod.koul@linaro.org, linux-kernel@vger.kernel.org, pierre-louis.bossart@linux.intel.com, bard.liao@intel.com Subject: [PATCH v2 09/14] soundwire: mipi-disco: add error handling for property array read Date: Wed, 11 Sep 2024 19:58:22 +0800 Message-ID: <20240911115827.233171-10-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240911115827.233171-1-yung-chuan.liao@linux.intel.com> References: <20240911115827.233171-1-yung-chuan.liao@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Pierre-Louis Bossart The existing code assumes that there are no possible errors when using fwnode_property_read_u32_array(), because fwnode_property_count_u32() reads this array to determine its number of elements. We need to also protect the second read to be completely bullet-proof. Suggested-by: Andy Shevchenko Signed-off-by: Pierre-Louis Bossart Signed-off-by: Bard Liao --- drivers/soundwire/mipi_disco.c | 32 ++++++++++++++++++++++++-------- 1 file changed, 24 insertions(+), 8 deletions(-) diff --git a/drivers/soundwire/mipi_disco.c b/drivers/soundwire/mipi_disco.c index 79cf8212f97a..99253f4c9a38 100644 --- a/drivers/soundwire/mipi_disco.c +++ b/drivers/soundwire/mipi_disco.c @@ -52,7 +52,9 @@ int sdw_master_read_prop(struct sdw_bus *bus) struct sdw_master_prop *prop =3D &bus->prop; struct fwnode_handle *link; char name[32]; - int nval, i; + int nval; + int ret; + int i; =20 device_property_read_u32(bus->dev, "mipi-sdw-sw-interface-revision", @@ -91,9 +93,11 @@ int sdw_master_read_prop(struct sdw_bus *bus) return -ENOMEM; } =20 - fwnode_property_read_u32_array(link, + ret =3D fwnode_property_read_u32_array(link, "mipi-sdw-clock-frequencies-supported", prop->clk_freq, prop->num_clk_freq); + if (ret < 0) + return ret; } =20 /* @@ -119,10 +123,12 @@ int sdw_master_read_prop(struct sdw_bus *bus) return -ENOMEM; } =20 - fwnode_property_read_u32_array(link, + ret =3D fwnode_property_read_u32_array(link, "mipi-sdw-supported-clock-gears", prop->clk_gears, prop->num_clk_gears); + if (ret < 0) + return ret; } =20 fwnode_property_read_u32(link, "mipi-sdw-default-frame-rate", @@ -151,6 +157,7 @@ static int sdw_slave_read_dp0(struct sdw_slave *slave, struct sdw_dp0_prop *dp0) { int nval; + int ret; =20 fwnode_property_read_u32(port, "mipi-sdw-port-max-wordlength", &dp0->max_word); @@ -168,9 +175,11 @@ static int sdw_slave_read_dp0(struct sdw_slave *slave, if (!dp0->words) return -ENOMEM; =20 - fwnode_property_read_u32_array(port, + ret =3D fwnode_property_read_u32_array(port, "mipi-sdw-port-wordlength-configs", dp0->words, dp0->num_words); + if (ret < 0) + return ret; } =20 dp0->BRA_flow_controlled =3D mipi_fwnode_property_read_bool(port, @@ -191,9 +200,10 @@ static int sdw_slave_read_dpn(struct sdw_slave *slave, { struct fwnode_handle *node; u32 bit, i =3D 0; - int nval; unsigned long addr; char name[40]; + int nval; + int ret; =20 addr =3D ports; /* valid ports are 1 to 14 so apply mask */ @@ -228,9 +238,11 @@ static int sdw_slave_read_dpn(struct sdw_slave *slave, return -ENOMEM; } =20 - fwnode_property_read_u32_array(node, + ret =3D fwnode_property_read_u32_array(node, "mipi-sdw-port-wordlength-configs", dpn[i].words, dpn[i].num_words); + if (ret < 0) + return ret; } =20 fwnode_property_read_u32(node, "mipi-sdw-data-port-type", @@ -269,9 +281,11 @@ static int sdw_slave_read_dpn(struct sdw_slave *slave, return -ENOMEM; } =20 - fwnode_property_read_u32_array(node, + ret =3D fwnode_property_read_u32_array(node, "mipi-sdw-channel-number-list", dpn[i].channels, dpn[i].num_channels); + if (ret < 0) + return ret; } =20 nval =3D fwnode_property_count_u32(node, "mipi-sdw-channel-combination-l= ist"); @@ -286,10 +300,12 @@ static int sdw_slave_read_dpn(struct sdw_slave *slave, return -ENOMEM; } =20 - fwnode_property_read_u32_array(node, + ret =3D fwnode_property_read_u32_array(node, "mipi-sdw-channel-combination-list", dpn[i].ch_combinations, dpn[i].num_ch_combinations); + if (ret < 0) + return ret; } =20 fwnode_property_read_u32(node, --=20 2.43.0