On Wed, Jul 21, 2021 at 05:35:16PM +0200, Christoph Hellwig wrote:
> blkdev_get_no_open acquires a reference to the block_device through
> the block device inode and then tries to acquire a device model
> reference to the gendisk. But at this point the disk migh already
> be freed (although the race is free). Fix this by only freeing the
> gendisk from the whole device bdevs ->free_inode callback as well.
>
> Fixes: 22ae8ce8b892 ("block: simplify bdev/disk lookup in blkdev_get")
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx>
--
Ming
