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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,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 BFB5BC10F0E for ; Thu, 18 Apr 2019 17:59:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 82EE421871 for ; Thu, 18 Apr 2019 17:59:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555610346; bh=+DHJI8oZgnH3BYAHpcucBUH9XQlh9R11NVANIMoaBYk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=KHTV0kbr46fQlkMm7JRT6PyZcygH7qjZgJXFy6TgdnUxzpT0QXKoGBTfqPZ8+oyDO Z1F1fltOPMfPTh8AreD5GfsXqJwZRCMmudqFBUgjqOmZ7tBXO0jzEu7sL//FEAMIkM pqZ9DVILqelBlRgnk7u6bBawBTf9SUk+w6V/dbtg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390035AbfDRR7F (ORCPT ); Thu, 18 Apr 2019 13:59:05 -0400 Received: from mail.kernel.org ([198.145.29.99]:53480 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390015AbfDRR7C (ORCPT ); Thu, 18 Apr 2019 13:59:02 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 4F18C217FA; Thu, 18 Apr 2019 17:59:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555610341; bh=+DHJI8oZgnH3BYAHpcucBUH9XQlh9R11NVANIMoaBYk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=c3cVenBiuwFPGXQ4W1CSPof+FXKJt6oUiBpy/3x0054MxmvG0Ro0bBIlQCQzlZVdW R2ZszkKIaDyDs/R1kzWqiE218rtMPuLdfsLAKtZwCsrm3K9yWHC5MTdcE9IOkbIJpD gU2iHjVRl54jit0+GZ0/RduWCkrg6ayowBTliHS8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kangjie Lu , Takashi Iwai , Sasha Levin Subject: [PATCH 4.19 009/110] ALSA: echoaudio: add a check for ioremap_nocache Date: Thu, 18 Apr 2019 19:55:58 +0200 Message-Id: <20190418160438.285654616@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190418160437.484158340@linuxfoundation.org> References: <20190418160437.484158340@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ Upstream commit 6ade657d6125ec3ec07f95fa51e28138aef6208f ] In case ioremap_nocache fails, the fix releases chip and returns an error code upstream to avoid NULL pointer dereference. Signed-off-by: Kangjie Lu Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- sound/pci/echoaudio/echoaudio.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/sound/pci/echoaudio/echoaudio.c b/sound/pci/echoaudio/echoaudio.c index 907cf1a46712..3ef2b27ebbe8 100644 --- a/sound/pci/echoaudio/echoaudio.c +++ b/sound/pci/echoaudio/echoaudio.c @@ -1954,6 +1954,11 @@ static int snd_echo_create(struct snd_card *card, } chip->dsp_registers = (volatile u32 __iomem *) ioremap_nocache(chip->dsp_registers_phys, sz); + if (!chip->dsp_registers) { + dev_err(chip->card->dev, "ioremap failed\n"); + snd_echo_free(chip); + return -ENOMEM; + } if (request_irq(pci->irq, snd_echo_interrupt, IRQF_SHARED, KBUILD_MODNAME, chip)) { -- 2.19.1