From 0077a50082729c3f9ea2836f59e35d9b7dacfb12 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Wed, 21 Jul 2021 12:16:26 +0200 Subject: [PATCH] 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: 195b1956b85b ("rbd: use blk_mq_alloc_disk and blk_cleanup_disk") Signed-off-by: Ilya Dryomov Reviewed-by: Christoph Hellwig --- drivers/block/rbd.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 784797f..90b947c 100644 --- 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 */ -- 2.7.4