BUG: sleeping function called from invalid context at block/blk-sysfs.c:766 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 17, name: ksoftirqd/0 preempt_count: 100, expected: 0 RCU nest depth: 0, expected: 0 1 lock held by ksoftirqd/0/17: #0: ffffffff8bd7f2c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2524 [inline] #0: ffffffff8bd7f2c0 (rcu_callback){....}-{0:0}, at: rcu_core+0x73d/0x1880 kernel/rcu/tree.c:2786 Preemption disabled at: [] softirq_handle_begin kernel/softirq.c:396 [inline] [] __do_softirq+0xe1/0x9c2 kernel/softirq.c:534 CPU: 0 PID: 17 Comm: ksoftirqd/0 Not tainted 5.17.0-syzkaller-13805-gb012b3235cb9 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 __might_resched.cold+0x222/0x26b kernel/sched/core.c:9733 blk_release_queue+0x1f/0x320 block/blk-sysfs.c:766 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c8/0x540 lib/kobject.c:753 blkg_free.part.0+0x112/0x1f0 block/blk-cgroup.c:86 blkg_free block/blk-cgroup.c:78 [inline] __blkg_release+0x105/0x160 block/blk-cgroup.c:102 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0x7b1/0x1880 kernel/rcu/tree.c:2786 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 run_ksoftirqd kernel/softirq.c:921 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:913 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 ================================ WARNING: inconsistent lock state 5.17.0-syzkaller-13805-gb012b3235cb9 #0 Tainted: G W -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. ksoftirqd/0/17 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff88801a9faf70 (&xa->xa_lock#9){+.?.}-{2:2}, at: xa_destroy+0xb3/0x360 lib/xarray.c:2207 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5641 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5606 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:349 [inline] xa_insert include/linux/xarray.h:772 [inline] blk_mq_init_hctx block/blk-mq.c:3501 [inline] blk_mq_alloc_and_init_hctx+0x52d/0x1190 block/blk-mq.c:3962 blk_mq_realloc_hw_ctxs+0x43d/0x590 block/blk-mq.c:3991 blk_mq_init_allocated_queue+0x457/0x13d0 block/blk-mq.c:4053 blk_mq_init_queue_data block/blk-mq.c:3906 [inline] __blk_mq_alloc_disk+0xd1/0x1c0 block/blk-mq.c:3926 floppy_alloc_disk+0x3d/0x390 drivers/block/floppy.c:4495 do_floppy_init drivers/block/floppy.c:4576 [inline] floppy_async_init+0x316/0x21ca drivers/block/floppy.c:4746 async_run_entry_fn+0x9d/0x550 kernel/async.c:127 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 irq event stamp: 526551 hardirqs last enabled at (526550): [] kfree+0x1fb/0x310 mm/slab.c:3811 hardirqs last disabled at (526551): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (526551): [] _raw_spin_lock_irqsave+0x4e/0x50 kernel/locking/spinlock.c:162 softirqs last enabled at (526266): [] run_ksoftirqd kernel/softirq.c:921 [inline] softirqs last enabled at (526266): [] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:913 softirqs last disabled at (526271): [] run_ksoftirqd kernel/softirq.c:921 [inline] softirqs last disabled at (526271): [] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:913 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&xa->xa_lock#9); lock(&xa->xa_lock#9); *** DEADLOCK *** 1 lock held by ksoftirqd/0/17: #0: ffffffff8bd7f2c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2524 [inline] #0: ffffffff8bd7f2c0 (rcu_callback){....}-{0:0}, at: rcu_core+0x73d/0x1880 kernel/rcu/tree.c:2786 stack backtrace: CPU: 0 PID: 17 Comm: ksoftirqd/0 Tainted: G W 5.17.0-syzkaller-13805-gb012b3235cb9 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_usage_bug kernel/locking/lockdep.c:3935 [inline] valid_state kernel/locking/lockdep.c:3947 [inline] mark_lock_irq kernel/locking/lockdep.c:4150 [inline] mark_lock.part.0.cold+0x18/0xd8 kernel/locking/lockdep.c:4607 mark_lock kernel/locking/lockdep.c:4571 [inline] mark_usage kernel/locking/lockdep.c:4502 [inline] __lock_acquire+0x11e7/0x56c0 kernel/locking/lockdep.c:4983 lock_acquire kernel/locking/lockdep.c:5641 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5606 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 xa_destroy+0xb3/0x360 lib/xarray.c:2207 blk_mq_release+0x2b1/0x3e0 block/blk-mq.c:3887 blk_release_queue+0x15b/0x320 block/blk-sysfs.c:780 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c8/0x540 lib/kobject.c:753 blkg_free.part.0+0x112/0x1f0 block/blk-cgroup.c:86 blkg_free block/blk-cgroup.c:78 [inline] __blkg_release+0x105/0x160 block/blk-cgroup.c:102 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0x7b1/0x1880 kernel/rcu/tree.c:2786 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 run_ksoftirqd kernel/softirq.c:921 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:913 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298