From patchwork Tue Sep 29 11:01:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 263186 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=-13.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, 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 EB9EEC4727F for ; Tue, 29 Sep 2020 11:55:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A6FCB206DB for ; Tue, 29 Sep 2020 11:55:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601380546; bh=RsHOz24AamUalIT+Vh94hhCx8b+xThUBH6MW5GOnlXc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=vXXp+wK/1m3rClrDHmJ0sJPuv8XIIDLocxsrfm7JWCEF37lbjfzZLek4zIqGywCxW FNBHxYALG3ybOUNzdjigLcy5CJ42BIPgNjiB/Uh0sBJXMvaZqcutL3mWnvsFQXjPgp 4/jZUrTqV7hCumvcjiGthVqegu+7sbqN4urRj2I0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730909AbgI2Los (ORCPT ); Tue, 29 Sep 2020 07:44:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:43910 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730900AbgI2Lon (ORCPT ); Tue, 29 Sep 2020 07:44:43 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E61A9206E5; Tue, 29 Sep 2020 11:44:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601379881; bh=RsHOz24AamUalIT+Vh94hhCx8b+xThUBH6MW5GOnlXc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JJdM6zRdG/nYvRy4n2245GWXa/oRJYW6fiaUFeiTofcQyujr7JRY4su+lcwKSyAiP Clml3pOCPUkdY2r/iirjp3M7Ew+8GH49CwM51lCA4DVTiif0OZ3mRNvgV53/MSGmoP jpGt8B2OMxWokF7Lu7+tavvGMLSXMbAJ3UqVIq54= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tom Rix , Takashi Iwai , Sasha Levin Subject: [PATCH 5.4 359/388] ALSA: asihpi: fix iounmap in error handler Date: Tue, 29 Sep 2020 13:01:30 +0200 Message-Id: <20200929110027.842246203@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200929110010.467764689@linuxfoundation.org> References: <20200929110010.467764689@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Tom Rix [ Upstream commit 472eb39103e885f302fd8fd6eff104fcf5503f1b ] clang static analysis flags this problem hpioctl.c:513:7: warning: Branch condition evaluates to a garbage value if (pci.ap_mem_base[idx]) { ^~~~~~~~~~~~~~~~~~~~ If there is a failure in the middle of the memory space loop, only some of the memory spaces need to be cleaned up. At the error handler, idx holds the number of successful memory spaces mapped. So rework the handler loop to use the old idx. There is a second problem, the memory space loop conditionally iomaps()/sets the mem_base so it is necessay to initize pci. Fixes: 719f82d3987a ("ALSA: Add support of AudioScience ASI boards") Signed-off-by: Tom Rix Link: https://lore.kernel.org/r/20200913165230.17166-1-trix@redhat.com Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- sound/pci/asihpi/hpioctl.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sound/pci/asihpi/hpioctl.c b/sound/pci/asihpi/hpioctl.c index 496dcde9715d6..9790f5108a166 100644 --- a/sound/pci/asihpi/hpioctl.c +++ b/sound/pci/asihpi/hpioctl.c @@ -343,7 +343,7 @@ int asihpi_adapter_probe(struct pci_dev *pci_dev, struct hpi_message hm; struct hpi_response hr; struct hpi_adapter adapter; - struct hpi_pci pci; + struct hpi_pci pci = { 0 }; memset(&adapter, 0, sizeof(adapter)); @@ -499,7 +499,7 @@ int asihpi_adapter_probe(struct pci_dev *pci_dev, return 0; err: - for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) { + while (--idx >= 0) { if (pci.ap_mem_base[idx]) { iounmap(pci.ap_mem_base[idx]); pci.ap_mem_base[idx] = NULL;