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 9DFFFC4708D for ; Wed, 28 Dec 2022 16:05:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234333AbiL1QFk (ORCPT ); Wed, 28 Dec 2022 11:05:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52454 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234243AbiL1QFi (ORCPT ); Wed, 28 Dec 2022 11:05:38 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 05F69193D4 for ; Wed, 28 Dec 2022 08:05:37 -0800 (PST) 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 9198F60D41 for ; Wed, 28 Dec 2022 16:05:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A78ECC433D2; Wed, 28 Dec 2022 16:05:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672243536; bh=W9wUOoN8RjUY0goWAA4qXdYTiG1MYt93A2fnmLO/5aI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wEC+aICCZGZd0x6wtrBoM5OlmwGabQMt2c4TI3ZVmrGXKH4KyIsr/qo4tqz/a37za 6NhPU6SM+h+hlTm3wChOrfcCUktw1gv8xMxoK8bIej4d6S+DLdD0PPdSK+hsK1RdD2 PUXjn0XRHQpBIxHWGruFA/WGT4CpaLSnElZFWRP4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yang Yingliang , Ulf Hansson , Sasha Levin Subject: [PATCH 6.1 0508/1146] mmc: via-sdmmc: fix return value check of mmc_add_host() Date: Wed, 28 Dec 2022 15:34:07 +0100 Message-Id: <20221228144343.973882410@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144330.180012208@linuxfoundation.org> References: <20221228144330.180012208@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: stable@vger.kernel.org From: Yang Yingliang [ Upstream commit e4e46fb61e3bb4628170810d3f2b996b709b90d9 ] mmc_add_host() may return error, if we ignore its return value, it will lead two issues: 1. The memory that allocated in mmc_alloc_host() is leaked. 2. In the remove() path, mmc_remove_host() will be called to delete device, but it's not added yet, it will lead a kernel crash because of null-ptr-deref in device_del(). Fix this by checking the return value and goto error path which will call mmc_free_host(). Fixes: f0bf7f61b840 ("mmc: Add new via-sdmmc host controller driver") Signed-off-by: Yang Yingliang Link: https://lore.kernel.org/r/20221108130949.1067699-1-yangyingliang@huawei.com Signed-off-by: Ulf Hansson Signed-off-by: Sasha Levin --- drivers/mmc/host/via-sdmmc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/via-sdmmc.c b/drivers/mmc/host/via-sdmmc.c index 88662a90ed96..a2b0d9461665 100644 --- a/drivers/mmc/host/via-sdmmc.c +++ b/drivers/mmc/host/via-sdmmc.c @@ -1151,7 +1151,9 @@ static int via_sd_probe(struct pci_dev *pcidev, pcidev->subsystem_device == 0x3891) sdhost->quirks = VIA_CRDR_QUIRK_300MS_PWRDELAY; - mmc_add_host(mmc); + ret = mmc_add_host(mmc); + if (ret) + goto unmap; return 0; -- 2.35.1