From patchwork Wed Jul 13 02:56:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Yingliang X-Patchwork-Id: 590265 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 7C1E7C433EF for ; Wed, 13 Jul 2022 02:47:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230170AbiGMCrh (ORCPT ); Tue, 12 Jul 2022 22:47:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51912 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229824AbiGMCrg (ORCPT ); Tue, 12 Jul 2022 22:47:36 -0400 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 11F5FCC03D; Tue, 12 Jul 2022 19:47:36 -0700 (PDT) Received: from dggpemm500024.china.huawei.com (unknown [172.30.72.53]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4LjMRJ060Jz1L92R; Wed, 13 Jul 2022 10:45:00 +0800 (CST) Received: from dggpemm500007.china.huawei.com (7.185.36.183) by dggpemm500024.china.huawei.com (7.185.36.203) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Wed, 13 Jul 2022 10:47:34 +0800 Received: from huawei.com (10.175.103.91) by dggpemm500007.china.huawei.com (7.185.36.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Wed, 13 Jul 2022 10:47:33 +0800 From: Yang Yingliang To: , , CC: , , Subject: [PATCH -next v2 1/3] spi: microchip-core: fix UAF in mchp_corespi_remove() Date: Wed, 13 Jul 2022 10:56:55 +0800 Message-ID: <20220713025657.3524506-2-yangyingliang@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220713025657.3524506-1-yangyingliang@huawei.com> References: <20220713025657.3524506-1-yangyingliang@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.103.91] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To dggpemm500007.china.huawei.com (7.185.36.183) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org When using devm_spi_register_master(), the unregister function will be called in devres_release_all() which is called after ->remove(), so remove spi_unregister_master() andspi_master_put(). Fixes: 9ac8d17694b6 ("spi: add support for microchip fpga spi controllers") Signed-off-by: Yang Yingliang --- drivers/spi/spi-microchip-core.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/spi/spi-microchip-core.c b/drivers/spi/spi-microchip-core.c index b3083075cd36..c26767343176 100644 --- a/drivers/spi/spi-microchip-core.c +++ b/drivers/spi/spi-microchip-core.c @@ -595,8 +595,6 @@ static int mchp_corespi_remove(struct platform_device *pdev) struct mchp_corespi *spi = spi_master_get_devdata(master); mchp_corespi_disable_ints(spi); - spi_unregister_master(master); - spi_master_put(master); clk_disable_unprepare(spi->clk); mchp_corespi_disable(spi);