From: Jens Axboe <axboe@kernel.dk>
To: Ming Lei <ming.lei@redhat.com>
Cc: linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
Bart Van Assche <bvanassche@acm.org>,
syzbot+8fede7e30c7cee0de139@syzkaller.appspotmail.com
Subject: Re: [PATCH V2] block: not create too many partitions
Date: Sat, 27 Mar 2021 08:56:27 -0600 [thread overview]
Message-ID: <07bc20fa-69f8-a827-cc04-487507cddf8e@kernel.dk> (raw)
In-Reply-To: <20210327071309.553557-1-ming.lei@redhat.com>
On 3/27/21 1:13 AM, Ming Lei wrote:
> Commit a33df75c6328 ("block: use an xarray for disk->part_tbl") drops
> check on max supported partitions number, and allows partition with
> bigger partition number to be added. However, ->bd_partno is defined
> as u8, so partition index of xarray table may not match with ->bd_partno.
> Then delete_partition() may delete one unmatched partition, and caused
> use-after-free.
Applied, thanks for nailing this one down, Ming.
--
Jens Axboe
next prev parent reply other threads:[~2021-03-27 14:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-27 7:13 [PATCH V2] block: not create too many partitions Ming Lei
2021-03-27 14:56 ` Jens Axboe [this message]
2021-03-27 15:07 ` Bart Van Assche
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