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 D61BCC32771 for ; Mon, 26 Sep 2022 10:36:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236010AbiIZKgO (ORCPT ); Mon, 26 Sep 2022 06:36:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60352 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235995AbiIZKds (ORCPT ); Mon, 26 Sep 2022 06:33:48 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 06081402D2; Mon, 26 Sep 2022 03:20:50 -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 dfw.source.kernel.org (Postfix) with ESMTPS id A4D5260BB7; Mon, 26 Sep 2022 10:20:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9A4DBC433C1; Mon, 26 Sep 2022 10:20:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1664187650; bh=ej2tE7gZWV9cHhIiuMetz5wTyN3WfyfLSQZWx7J+Hu0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tvD4tf7F+n298aNBzeZ9lT+CY0AyUb//dBtODZox38RJc9aWY+XNH81BpRGDlDyi2 R9/5izKLnblN2BJ81Bz9tLEbJHmY3nLIEmR0LKomOGTaheNRpNcdkBrfN5gG1BWsa+ 0HpT/kfNQJMm1v8gE70eco9+64BzVbo88CXQn+UQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Xiaolei Wang , Mark Brown , Sasha Levin Subject: [PATCH 5.4 017/120] regulator: pfuze100: Fix the global-out-of-bounds access in pfuze100_regulator_probe() Date: Mon, 26 Sep 2022 12:10:50 +0200 Message-Id: <20220926100751.233965623@linuxfoundation.org> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220926100750.519221159@linuxfoundation.org> References: <20220926100750.519221159@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Xiaolei Wang [ Upstream commit 78e1e867f44e6bdc72c0e6a2609a3407642fb30b ] The pfuze_chip::regulator_descs is an array of size PFUZE100_MAX_REGULATOR, the pfuze_chip::pfuze_regulators is the pointer to the real regulators of a specific device. The number of real regulator is supposed to be less than the PFUZE100_MAX_REGULATOR, so we should use the size of 'regulator_num * sizeof(struct pfuze_regulator)' in memcpy(). This fixes the out of bounds access bug reported by KASAN. Signed-off-by: Xiaolei Wang Link: https://lore.kernel.org/r/20220825111922.1368055-1-xiaolei.wang@windriver.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/regulator/pfuze100-regulator.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c index f873d97100e2..13609942d45c 100644 --- a/drivers/regulator/pfuze100-regulator.c +++ b/drivers/regulator/pfuze100-regulator.c @@ -788,7 +788,7 @@ static int pfuze100_regulator_probe(struct i2c_client *client, ((pfuze_chip->chip_id == PFUZE3000) ? "3000" : "3001")))); memcpy(pfuze_chip->regulator_descs, pfuze_chip->pfuze_regulators, - sizeof(pfuze_chip->regulator_descs)); + regulator_num * sizeof(struct pfuze_regulator)); ret = pfuze_parse_regulators_dt(pfuze_chip); if (ret) -- 2.35.1