From patchwork Thu Oct 20 13:20:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu Kuai X-Patchwork-Id: 13013425 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 A5568C433FE for ; Thu, 20 Oct 2022 12:58:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229602AbiJTM6w (ORCPT ); Thu, 20 Oct 2022 08:58:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52274 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229679AbiJTM6w (ORCPT ); Thu, 20 Oct 2022 08:58:52 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0EA1318A00B; Thu, 20 Oct 2022 05:58:51 -0700 (PDT) Received: from dggemv711-chm.china.huawei.com (unknown [172.30.72.56]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4MtSGM3QBlzmV9g; Thu, 20 Oct 2022 20:54:03 +0800 (CST) Received: from kwepemm600009.china.huawei.com (7.193.23.164) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Thu, 20 Oct 2022 20:58:48 +0800 Received: from huawei.com (10.175.127.227) by kwepemm600009.china.huawei.com (7.193.23.164) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Thu, 20 Oct 2022 20:58:47 +0800 From: Yu Kuai To: , , , , , , , CC: , , , Subject: [PATCH -nect RFC v2 0/2] block: fix uaf in bd_link_disk_holder() Date: Thu, 20 Oct 2022 21:20:47 +0800 Message-ID: <20221020132049.3947415-1-yukuai3@huawei.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-Originating-IP: [10.175.127.227] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To kwepemm600009.china.huawei.com (7.193.23.164) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Changes in v2: - in order to know when bd_holder_dir will be freed, instead of changing kobject_put(), add a new field in block_device. Yu Kuai (2): block: add helpers for bd_holder_dir refcount management block: fix uaf for bd_holder_dir block/blk.h | 3 +++ block/genhd.c | 33 ++++++++++++++++++++++++++++++++- block/holder.c | 19 +++++++++++++------ block/partitions/core.c | 5 ++++- include/linux/blk_types.h | 1 + 5 files changed, 53 insertions(+), 8 deletions(-)