Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Thu, 16 Jun 2022 08:35:10 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc:     Christoph Hellwig <hch@lst.de>, dsterba@suse.cz,
        syzbot <syzbot+d2dd123304b4ae59f1bd@syzkaller.appspotmail.com>,
        akpm@linux-foundation.org, clm@fb.com, dsterba@suse.com,
        josef@toxicpanda.com, linux-btrfs@vger.kernel.org,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org, syzkaller-bugs@googlegroups.com,
        willy@infradead.org
Subject: Re: [syzbot] KASAN: use-after-free Read in
 copy_page_from_iter_atomic (2)
Message-ID: <20220616063510.GA5608@lst.de>
References: <0000000000003ce9d105e0db53c8@google.com> <00000000000085068105e112a117@google.com> <20220613193912.GI20633@twin.jikos.cz> <20220614071757.GA1207@lst.de> <2cc67037-cf90-cca2-1655-46b92b43eba8@gmx.com> <20220615132147.GA18252@lst.de> <00bbda63-dc00-05c0-4244-343352591d98@gmx.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <00bbda63-dc00-05c0-4244-343352591d98@gmx.com>
User-Agent: Mutt/1.5.17 (2007-11-01)
Precedence: bulk

On Thu, Jun 16, 2022 at 05:27:04AM +0800, Qu Wenruo wrote:
>> And how do I find out the logic address of the tree root?
>
> For tree root, "btrfs ins dump-super <dev> | grep '^root\s'.
>
> For other tree blocks, "btrfs ins dump-tree <dev>" then with other other
> keywords to grab.

Thanks a lot !