linux-kernel - [PATCH -nect RFC v2 0/2] block: fix uaf in bd_link_disk

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Message-ID: <20221020132049.3947415-1-yukuai3@huawei.com>
Date:   Thu, 20 Oct 2022 21:20:47 +0800
From:   Yu Kuai <yukuai3@...wei.com>
To:     <axboe@...nel.dk>, <hch@....de>, <willy@...radead.org>,
        <kch@...dia.com>, <martin.petersen@...cle.com>,
        <johannes.thumshirn@....com>, <yukuai3@...wei.com>,
        <ming.lei@...hat.com>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <yukuai1@...weicloud.com>, <yi.zhang@...wei.com>
Subject: [PATCH -nect RFC v2 0/2] block: fix uaf in bd_link_disk_holder()

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(-)

-- 
2.31.1