[14/31] cdrom: Check private request size before attaching to a queue
diff mbox

Message ID 20170524003420.5381-15-bart.vanassche@sandisk.com
State New
Headers show

Commit Message

Bart Van Assche May 24, 2017, 12:34 a.m. UTC
Since the cdrom driver 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 this is
not the case.

References: commit 82ed4db499b8 ("block: split scsi_request out of struct request")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Jens Axboe <axboe@fb.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
---
 drivers/cdrom/cdrom.c | 4 ++++
 1 file changed, 4 insertions(+)

Comments

Hannes Reinecke May 24, 2017, 6:02 a.m. UTC | #1
On 05/24/2017 02:34 AM, Bart Van Assche wrote:
> Since the cdrom driver 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 this is
> not the case.
> 
> References: commit 82ed4db499b8 ("block: split scsi_request out of struct request")
> Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
> Cc: Jens Axboe <axboe@fb.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
> ---
>  drivers/cdrom/cdrom.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
> index 76c952fd9ab9..070568d496dc 100644
> --- a/drivers/cdrom/cdrom.c
> +++ b/drivers/cdrom/cdrom.c
> @@ -594,6 +594,10 @@ int register_cdrom(struct cdrom_device_info *cdi)
>  
>  	if (cdo->open == NULL || cdo->release == NULL)
>  		return -EINVAL;
> +	if (!blk_queue_scsi_sup(cdi->disk->queue)) {
> +		WARN_ONCE(true, "Attempt to register a non-SCSI queue\n");
> +		return -EINVAL;
> +	}
>  	if (!banner_printed) {
>  		pr_info("Uniform CD-ROM driver " REVISION "\n");
>  		banner_printed = 1;
> 
Reviewed-by: Hannes Reinecke <hare@suse.com>

Cheers,

Hannes

Patch
diff mbox

diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 76c952fd9ab9..070568d496dc 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -594,6 +594,10 @@  int register_cdrom(struct cdrom_device_info *cdi)
 
 	if (cdo->open == NULL || cdo->release == NULL)
 		return -EINVAL;
+	if (!blk_queue_scsi_sup(cdi->disk->queue)) {
+		WARN_ONCE(true, "Attempt to register a non-SCSI queue\n");
+		return -EINVAL;
+	}
 	if (!banner_printed) {
 		pr_info("Uniform CD-ROM driver " REVISION "\n");
 		banner_printed = 1;