linux-kernel - Re: [PATCH RFC] block: fix use after free for bd_holder_dir/slave

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Message-ID: <Y00+SsxI7IJ56im8@infradead.org>
Date:   Mon, 17 Oct 2022 04:36:42 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Yu Kuai <yukuai1@...weicloud.com>
Cc:     Christoph Hellwig <hch@...radead.org>, axboe@...nel.dk,
        gregkh@...uxfoundation.org, willy@...radead.org, kch@...dia.com,
        martin.petersen@...cle.com, johannes.thumshirn@....com,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        yi.zhang@...wei.com, "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH RFC] block: fix use after free for bd_holder_dir/slave_dir

On Mon, Oct 17, 2022 at 05:24:20PM +0800, Yu Kuai wrote:
> I agree that this patch do make sense, however, it seems to me this
> patch should fix the problem that kobject is leaked, not uaf... And I
> verified that the problem can still be reporduced with this patch.

Can you share your reproducer?