rbd: resurrect setting of disk->private_data in rbd_init_disk()

rbd_open() and rbd_release() expect that disk->private_data is set to rbd_dev. Otherwise we hit a NULL pointer dereference when mapping the image. URL: https://tracker.ceph.com/issues/51759 Fixes: 195b195 ("rbd: use blk_mq_alloc_disk and blk_cleanup_disk") Signed-off-by: Ilya Dryomov <[email protected]> Reviewed-by: Christoph Hellwig <[email protected]>
torvalds · Jul 21, 2021 · 0077a50 · 0077a50
1 parent cdb330f
commit 0077a50
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
@@ -4943,6 +4943,7 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
  disk->minors = RBD_MINORS_PER_MAJOR;
  }
  disk->fops = &rbd_bd_ops;
+ disk->private_data = rbd_dev;
 
  blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
  /* QUEUE_FLAG_ADD_RANDOM is off by default for blk-mq */