drbd: Fix double free problem in drbd_create_device

[ Upstream commit 27548088ac628109f70eb0b1eb521d035844dba8 ]

In drbd_create_device(), the 'out_no_io_page' lable has called
blk_cleanup_disk() when return failed.

So remove the 'out_cleanup_disk' lable to avoid double free the
disk pointer.

Fixes: e92ab4eda516 ("drbd: add error handling support for add_disk()")
Signed-off-by: Wu Bo <wubo40@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/1636013229-26309-1-git-send-email-wubo40@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index ae6a136..b91d2a9 100644 (file)
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2800,7 +2800,7 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
 
        err = add_disk(disk);
        if (err)
-               goto out_cleanup_disk;
+               goto out_idr_remove_vol;
 
        /* inherit the connection state */
        device->state.conn = first_connection(resource)->cstate;
@@ -2814,8 +2814,6 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
        drbd_debugfs_device_add(device);
        return NO_ERROR;
 
-out_cleanup_disk:
-       blk_cleanup_disk(disk);
 out_idr_remove_vol:
        idr_remove(&connection->peer_devices, vnr);
 out_idr_remove_from_resource: