On Tue, 07 Nov 2023 18:34:35 +0800, Li Lingfeng wrote: > Commit 4af5f2e03013 ("nbd: use blk_mq_alloc_disk and > blk_cleanup_disk") cleans up disk by blk_cleanup_disk() and it won't set > disk->private_data as NULL as before. UAF may be triggered in nbd_open() > if someone tries to open nbd device right after nbd_put() since nbd has > been free in nbd_dev_remove(). > > Fix this by implementing ->free_disk and free private data in it. > > [...] Applied, thanks! [1/1] nbd: fix uaf in nbd_open commit: 327462725b0f759f093788dfbcb2f1fd132f956b Best regards, -- Jens Axboe