Re: [PATCH 12/31] bsg: Check queue type before attaching to a queue

Hannes Reinecke
2017-05-24T06:01:47Z

On 05/24/2017 02:34 AM, Bart Van Assche wrote:
> Since BSG only supports request queues for which struct scsi_request
> is the first member of their private request data, refuse to register
> block layer queues for which struct scsi_request is not the first
> member of their private data.
>
> References: commit bd1599d931ca ("scsi_transport_sas: fix BSG ioctl memory corruption")
> References: commit 82ed4db499b8 ("block: split scsi_request out of struct request")
> Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
> Cc: Christoph Hellwig <hch@lst.de>
> Cc: Omar Sandoval <osandov@fb.com>
> Cc: Hannes Reinecke <hare@suse.com>
> Cc: linux-block@vger.kernel.org
> ---
> block/bsg.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/block/bsg.c b/block/bsg.c
> index 6fd08544d77e..f7695bb141d9 100644
> --- a/block/bsg.c
> +++ b/block/bsg.c
> @@ -750,6 +750,12 @@ static struct bsg_device *bsg_add_device(struct inode *inode,
> #ifdef BSG_DEBUG
> unsigned char buf[32];
> #endif
> +
> + if (!blk_queue_scsi_sup(rq)) {
> + WARN_ONCE(true, "Attempt to register a non-SCSI queue\n");
> + return ERR_PTR(-EINVAL);
> + }
> +
> if (!blk_get_queue(rq))
> return ERR_PTR(-ENXIO);
>
>
Reviewed-by: Hannes Reinecke <hare@suse.com>

Cheers,

Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
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