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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 2221FCA9EC5 for ; Wed, 30 Oct 2019 15:57:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D42802083E for ; Wed, 30 Oct 2019 15:57:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572451035; bh=H/xK7rTKzYIYlsmIXXA56zLqgxHAPcGT4SOcy8KU/GA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=2ilpX13mlPo9LXCpmdSHWtWaqqh8LO6ywuXP6Zg4R5G5yKzuxumuu7ZTgPkXAUyHX T3f6qaqwbc0Ilmkx81wuk6bbcX6pKoxPLUHN1+vUdcHxZrsj0BJLWbh4uHw+4AMQIY N+K8VEVEtCMnMfyRTM0sb1lWgxLwqGv26Zzjq+tc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728993AbfJ3P5N (ORCPT ); Wed, 30 Oct 2019 11:57:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:58718 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727952AbfJ3P5G (ORCPT ); Wed, 30 Oct 2019 11:57:06 -0400 Received: from sasha-vm.mshome.net (100.50.158.77.rev.sfr.net [77.158.50.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CC32A2083E; Wed, 30 Oct 2019 15:57:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572451026; bh=H/xK7rTKzYIYlsmIXXA56zLqgxHAPcGT4SOcy8KU/GA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VsfYXKouhhKLeiNovieOmOMR5jMdZdSy4/l4qLhp3iDHzjXcXxmnPmi999D9d2UGT O+OIRml3lOEpeG7z/jBw6x3R5I2sBaP0Y2PdYCGiis1X7R+9LGxR147LODTdF/UpLf BK0oCQEoOEXppkSCd7/5sobaAwPVCP/cm6RVOCAc= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Yizhuo , Mark Brown , Sasha Levin Subject: [PATCH AUTOSEL 4.9 02/18] regulator: pfuze100-regulator: Variable "val" in pfuze100_regulator_probe() could be uninitialized Date: Wed, 30 Oct 2019 11:56:44 -0400 Message-Id: <20191030155700.10748-2-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191030155700.10748-1-sashal@kernel.org> References: <20191030155700.10748-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yizhuo [ Upstream commit 1252b283141f03c3dffd139292c862cae10e174d ] In function pfuze100_regulator_probe(), variable "val" could be initialized if regmap_read() fails. However, "val" is used to decide the control flow later in the if statement, which is potentially unsafe. Signed-off-by: Yizhuo Link: https://lore.kernel.org/r/20190929170957.14775-1-yzhai003@ucr.edu Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/regulator/pfuze100-regulator.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c index 86b348740fcdc..ffb1f61d2c752 100644 --- a/drivers/regulator/pfuze100-regulator.c +++ b/drivers/regulator/pfuze100-regulator.c @@ -608,7 +608,13 @@ static int pfuze100_regulator_probe(struct i2c_client *client, /* SW2~SW4 high bit check and modify the voltage value table */ if (i >= sw_check_start && i <= sw_check_end) { - regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val); + ret = regmap_read(pfuze_chip->regmap, + desc->vsel_reg, &val); + if (ret) { + dev_err(&client->dev, "Fails to read from the register.\n"); + return ret; + } + if (val & sw_hi) { if (pfuze_chip->chip_id == PFUZE3000) { desc->volt_table = pfuze3000_sw2hi; -- 2.20.1