BUG: memory leak unreferenced object 0xffff88810404b280 (size 96): comm "kworker/u4:0", pid 8, jiffies 4294937738 (age 314.640s) hex dump (first 32 bytes): 40 5d ca 85 ff ff ff ff 28 71 23 04 81 88 ff ff @]......(q#..... 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] kmalloc include/linux/slab.h:581 [inline] [] kzalloc include/linux/slab.h:714 [inline] [] blk_iolatency_init+0x28/0x190 block/blk-iolatency.c:725 [] blkcg_init_queue+0xee/0x1c0 block/blk-cgroup.c:1206 [] blk_alloc_queue+0x24a/0x4a0 block/blk-core.c:495 [] blk_mq_init_queue_data block/blk-mq.c:3872 [inline] [] __blk_mq_alloc_disk+0x3c/0xe0 block/blk-mq.c:3896 [] floppy_alloc_disk+0x2f/0x130 drivers/block/floppy.c:4499 [] do_floppy_init drivers/block/floppy.c:4580 [inline] [] floppy_async_init+0x10f/0x1364 drivers/block/floppy.c:4750 [] async_run_entry_fn+0x24/0xf0 kernel/async.c:127 [] process_one_work+0x2bf/0x600 kernel/workqueue.c:2307 [] worker_thread+0x59/0x5b0 kernel/workqueue.c:2454 [] kthread+0x125/0x160 kernel/kthread.c:377 [] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295