* [PATCH] rbd: resurrect setting of disk->private_data in rbd_init_disk()
@ 2021-07-21 13:09 Ilya Dryomov
2021-07-21 14:08 ` Christoph Hellwig
0 siblings, 1 reply; 2+ messages in thread
From: Ilya Dryomov @ 2021-07-21 13:09 UTC (permalink / raw)
To: ceph-devel; +Cc: Christoph Hellwig, Chaitanya Kulkarni
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.
Fixes: 195b1956b85b ("rbd: use blk_mq_alloc_disk and blk_cleanup_disk")
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
drivers/block/rbd.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 48c485d7efa1..9384395670b2 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 */
--
2.19.2
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2021-07-21 13:09 [PATCH] rbd: resurrect setting of disk->private_data in rbd_init_disk() Ilya Dryomov
2021-07-21 14:08 ` Christoph Hellwig
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