[PATCH v2 1/4] scsi: sd: reject invalid pr_read_keys() num_keys values

[Hannes Reinecke]

On 11/27/25 16:54, Stefan Hajnoczi wrote:
> The pr_read_keys() interface has a u32 num_keys parameter. The SCSI
> PERSISTENT RESERVE IN command has a maximum READ KEYS service action
> size of 65536 bytes. Reject num_keys values that are too large to fit
> into the SCSI command.
> 
> This will become important when pr_read_keys() is exposed to untrusted
> userspace via an <linux/pr.h> ioctl.
> 
> Signed-off-by: Stefan Hajnoczi <stefanha at redhat.com>
> ---
>   drivers/scsi/sd.c | 11 ++++++++++-
>   1 file changed, 10 insertions(+), 1 deletion(-)
> 
Reviewed-by: Hannes Reinecke <hare at suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                  Kernel Storage Architect
hare at suse.de                                +49 911 74053 688
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