From patchwork Wed May 12 14:47:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 438221 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_NONE, USER_AGENT_GIT 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 4738EC2B9F7 for ; Wed, 12 May 2021 16:19:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D8CF61D7E for ; Wed, 12 May 2021 16:19:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236622AbhELQUG (ORCPT ); Wed, 12 May 2021 12:20:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:47836 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233109AbhELQNr (ORCPT ); Wed, 12 May 2021 12:13:47 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id DADC161C78; Wed, 12 May 2021 15:41:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620834106; bh=qnFGewLe+G7YI3yq09BI+wvw0NVkl4hwlP0G17JXMjs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1TLapGarbYDijAfeOLA6vWwbUu9SSFXyv8MrotSKe9Af3P8KRfQTtuqjai2tikoX4 Sbtw4Zngi3/ZAQuTSWY+l6MqfueHDQ0t4A+2tzo805Pjpb1nhONgQOUGBtCZYwKnsu 8Q6uVIlTWeY1pI/0loEMeRJy4u9C4gk/syC4x0EA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johannes Thumshirn , Colin Ian King , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 5.11 366/601] scsi: pm80xx: Fix potential infinite loop Date: Wed, 12 May 2021 16:47:23 +0200 Message-Id: <20210512144839.854252865@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144827.811958675@linuxfoundation.org> References: <20210512144827.811958675@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Colin Ian King [ Upstream commit 40fa7394a1ad5706e795823276f2e394cca145d0 ] The for-loop iterates with a u8 loop counter i and compares this with the loop upper limit of pm8001_ha->max_q_num which is a u32 type. There is a potential infinite loop if pm8001_ha->max_q_num is larger than the u8 loop counter. Fix this by making the loop counter the same type as pm8001_ha->max_q_num. [mkp: this is purely theoretical, max_q_num is currently limited to 64] Link: https://lore.kernel.org/r/20210407135840.494747-1-colin.king@canonical.com Fixes: 65df7d1986a1 ("scsi: pm80xx: Fix chip initialization failure") Addresses-Coverity: ("Infinite loop") Reviewed-by: Johannes Thumshirn Signed-off-by: Colin Ian King Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/pm8001/pm8001_hwi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/pm8001/pm8001_hwi.c b/drivers/scsi/pm8001/pm8001_hwi.c index 6fa739c92beb..a28813d2683a 100644 --- a/drivers/scsi/pm8001/pm8001_hwi.c +++ b/drivers/scsi/pm8001/pm8001_hwi.c @@ -643,7 +643,7 @@ static void init_pci_device_addresses(struct pm8001_hba_info *pm8001_ha) */ static int pm8001_chip_init(struct pm8001_hba_info *pm8001_ha) { - u8 i = 0; + u32 i = 0; u16 deviceid; pci_read_config_word(pm8001_ha->pdev, PCI_DEVICE_ID, &deviceid); /* 8081 controllers need BAR shift to access MPI space