rsxx: Adapter address space sanity check.

Adding a sanity check to guarentee that DMAs outside of the device's
address space will be errored out right away.

Signed-off-by: Philip J Kelleher <pjk1939@linux.vnet.ibm.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/block/rsxx/dev.c b/drivers/block/rsxx/dev.c
index a092f58..d7af441 100644 (file)
--- a/drivers/block/rsxx/dev.c
+++ b/drivers/block/rsxx/dev.c
@@ -174,6 +174,9 @@ static void rsxx_make_request(struct request_queue *q, struct bio *bio)
        if (!card)
                goto req_err;
 
+       if (bio->bi_sector + (bio->bi_size >> 9) > get_capacity(card->gendisk))
+               goto req_err;
+
        if (unlikely(card->halt)) {
                st = -EFAULT;
                goto req_err;