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 95440C46467 for ; Wed, 28 Dec 2022 16:08:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233085AbiL1QI5 (ORCPT ); Wed, 28 Dec 2022 11:08:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55516 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234458AbiL1QIE (ORCPT ); Wed, 28 Dec 2022 11:08:04 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2F66619001 for ; Wed, 28 Dec 2022 08:08:03 -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 ams.source.kernel.org (Postfix) with ESMTPS id A07CAB81719 for ; Wed, 28 Dec 2022 16:08:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1406EC433F2; Wed, 28 Dec 2022 16:07:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672243680; bh=w1YzaSJKNEboYHq6N38JaF45u1KLSiLX8cd9M9u/2OE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=w2IcgCvi3UyryPvJtHbpJFISSj092A45eLgIqMfAaQ62BCq1vxNqRbG8sDpTJj0At gD2WHxvqjvCMM6HytxOishgpWA3t5+XZ+W0Qs1Ehl97+coXwuG9Hb/7d61qyB5QvKe ElRHo1szOZ2tICZWz3Dir+IwZQaIAhe8UjjMjLhw= 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 0506/1146] mmc: omap_hsmmc: fix return value check of mmc_add_host() Date: Wed, 28 Dec 2022 15:34:05 +0100 Message-Id: <20221228144343.920332269@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 a525cad241c339ca00bf7ebf03c5180f2a9b767c ] 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 wihch will call mmc_free_host(). Fixes: a45c6cb81647 ("[ARM] 5369/1: omap mmc: Add new omap hsmmc controller for 2430 and 34xx, v3") Signed-off-by: Yang Yingliang Link: https://lore.kernel.org/r/20221108121316.340354-1-yangyingliang@huawei.com Signed-off-by: Ulf Hansson Signed-off-by: Sasha Levin --- drivers/mmc/host/omap_hsmmc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index fca30add563e..4bd744755205 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -1946,7 +1946,9 @@ static int omap_hsmmc_probe(struct platform_device *pdev) if (!ret) mmc->caps |= MMC_CAP_SDIO_IRQ; - mmc_add_host(mmc); + ret = mmc_add_host(mmc); + if (ret) + goto err_irq; if (mmc_pdata(host)->name != NULL) { ret = device_create_file(&mmc->class_dev, &dev_attr_slot_name); -- 2.35.1