From: Christoph Hellwig <hch@lst.de>
To: Yang Xiuwei <yangxiuwei@kylinos.cn>
Cc: Jens Axboe <axboe@kernel.dk>,
"Martin K . Petersen" <mkp@kernel.org>,
Christian Brauner <brauner@kernel.org>,
Christoph Hellwig <hch@lst.de>,
linux-block@vger.kernel.org
Subject: Re: [PATCH] block: reject polled dio with user integrity metadata
Date: Wed, 23 Sep 2026 16:39:37 +0200 [thread overview]
Message-ID: <20260923143937.GA28622@lst.de> (raw)
In-Reply-To: <20260923093732.1504291-1-yangxiuwei@kylinos.cn>
On Wed, Sep 23, 2026 at 05:37:32PM +0800, Yang Xiuwei wrote:
> IOCB_HAS_METADATA leaves iocb->private as a uio_meta, while
> iocb_bio_iopoll() expects a bio. Since 2729a60bbfb9, metadata I/O
> always uses __blkdev_direct_IO(), which never publishes the bio for
> polling, so IOPOLL calls bio_poll() on the uio_meta.
>
> Reproducer: io_uring IOPOLL plus a PI attribute on an integrity device
> (scsi_debug dif=1 dix=1). KASAN reports:
Can you add a reproducer for this to blktests?
next prev parent reply other threads:[~2026-09-23 14:39 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-23 9:37 [PATCH] block: reject polled dio with user integrity metadata Yang Xiuwei
2026-09-23 11:20 ` Jens Axboe
2026-09-23 14:39 ` Christoph Hellwig [this message]
2026-09-24 0:35 ` Yang Xiuwei
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