================================
WARNING: inconsistent lock state
5.12.0-rc2-syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-R} usage.
kworker/1:1H/1817 [HC0[0]:SC1[1]:HE0:SE0] takes:
8a1b826c (&inode->i_size_seqcount){+.+-}-{0:0}, at: end_bio_bh_io_sync+0x38/0x54 fs/buffer.c:3006
{SOFTIRQ-ON-W} state was registered at:
  lock_acquire.part.0+0xf0/0x41c kernel/locking/lockdep.c:5510
  lock_acquire+0x6c/0x74 kernel/locking/lockdep.c:5483
  do_write_seqcount_begin_nested include/linux/seqlock.h:520 [inline]
  do_write_seqcount_begin include/linux/seqlock.h:545 [inline]
  i_size_write include/linux/fs.h:863 [inline]
  set_capacity+0x13c/0x1f8 block/genhd.c:50
  brd_alloc+0x130/0x180 drivers/block/brd.c:401
  brd_init+0xcc/0x1e0 drivers/block/brd.c:500
  do_one_initcall+0x8c/0x59c init/main.c:1226
  do_initcall_level init/main.c:1299 [inline]
  do_initcalls init/main.c:1315 [inline]
  do_basic_setup init/main.c:1335 [inline]
  kernel_init_freeable+0x2cc/0x330 init/main.c:1537
  kernel_init+0x10/0x120 init/main.c:1424
  ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:158
  0x0
irq event stamp: 1673
hardirqs last  enabled at (1672): [<802011ec>] __do_softirq+0xf4/0x7ac kernel/softirq.c:329
hardirqs last disabled at (1673): [<8277d260>] __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:157 [inline]
hardirqs last disabled at (1673): [<8277d260>] _raw_read_lock_irqsave+0x84/0x88 kernel/locking/spinlock.c:231
softirqs last  enabled at (1612): [<8020167c>] __do_softirq+0x584/0x7ac kernel/softirq.c:372
softirqs last disabled at (1671): [<8024e224>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (1671): [<8024e224>] invoke_softirq kernel/softirq.c:228 [inline]
softirqs last disabled at (1671): [<8024e224>] __irq_exit_rcu+0x1d8/0x200 kernel/softirq.c:422

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&inode->i_size_seqcount);
  <Interrupt>
    lock(&inode->i_size_seqcount);

 *** DEADLOCK ***

1 lock held by kworker/1:1H/1817:
 #0: 8a1b8010 (&ni->size_lock){...-}-{2:2}, at: ntfs_end_buffer_async_read+0x6c/0x558 fs/ntfs/aops.c:66

stack backtrace:
CPU: 1 PID: 1817 Comm: kworker/1:1H Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue:  0x0 (kblockd)
Backtrace: 
[<82740468>] (dump_backtrace) from [<827406dc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:252)
 r7:00000080 r6:60070193 r5:00000000 r4:8422a3c4
[<827406c4>] (show_stack) from [<82751b58>] (__dump_stack lib/dump_stack.c:79 [inline])
[<827406c4>] (show_stack) from [<82751b58>] (dump_stack+0xb8/0xe8 lib/dump_stack.c:120)
[<82751aa0>] (dump_stack) from [<82742918>] (print_usage_bug.part.0+0x228/0x230 kernel/locking/lockdep.c:3806)
 r7:858a16e8 r6:82803274 r5:848a35c4 r4:858a1040
[<827426f0>] (print_usage_bug.part.0) from [<802bb4b8>] (print_usage_bug kernel/locking/lockdep.c:3776 [inline])
[<827426f0>] (print_usage_bug.part.0) from [<802bb4b8>] (valid_state kernel/locking/lockdep.c:3818 [inline])
[<827426f0>] (print_usage_bug.part.0) from [<802bb4b8>] (mark_lock_irq kernel/locking/lockdep.c:4021 [inline])
[<827426f0>] (print_usage_bug.part.0) from [<802bb4b8>] (mark_lock.part.0+0xc34/0x136c kernel/locking/lockdep.c:4478)
 r10:84a42fe8 r9:84437748 r8:00000000 r7:844372d4 r6:00000006 r5:858a16e8
 r4:00000005
[<802ba884>] (mark_lock.part.0) from [<802bca0c>] (mark_lock kernel/locking/lockdep.c:4442 [inline])
[<802ba884>] (mark_lock.part.0) from [<802bca0c>] (mark_usage kernel/locking/lockdep.c:4365 [inline])
[<802ba884>] (mark_lock.part.0) from [<802bca0c>] (__lock_acquire+0xa84/0x3318 kernel/locking/lockdep.c:4854)
 r10:858a16e8 r9:858a1040 r8:00000001 r7:00040000 r6:00000239 r5:848a35c4
 r4:00000000
[<802bbf88>] (__lock_acquire) from [<802bfe90>] (lock_acquire.part.0+0xf0/0x41c kernel/locking/lockdep.c:5510)
 r10:00000080 r9:60070193 r8:00000000 r7:00000000 r6:83ecd680 r5:83ecd680
 r4:859e9b00
[<802bfda0>] (lock_acquire.part.0) from [<802c0228>] (lock_acquire+0x6c/0x74 kernel/locking/lockdep.c:5483)
 r10:8052dcb4 r9:00000000 r8:00000001 r7:00000002 r6:00000000 r5:00000000
 r4:8a1b826c
[<802c01bc>] (lock_acquire) from [<808b1af8>] (seqcount_lockdep_reader_access include/linux/seqlock.h:103 [inline])
[<802c01bc>] (lock_acquire) from [<808b1af8>] (i_size_read include/linux/fs.h:838 [inline])
[<802c01bc>] (lock_acquire) from [<808b1af8>] (ntfs_end_buffer_async_read+0xb4/0x558 fs/ntfs/aops.c:68)
 r10:8a1b8000 r9:60070193 r8:8052dcb4 r7:8a1b826c r6:df4b2650 r5:8a0dfea0
 r4:8a1b81c8
[<808b1a44>] (ntfs_end_buffer_async_read) from [<8052dcb4>] (end_bio_bh_io_sync+0x38/0x54 fs/buffer.c:3006)
 r10:00000800 r9:00000800 r8:0000000a r7:00000000 r6:87276040 r5:8a0dfea0
 r4:8aecd780
[<8052dc7c>] (end_bio_bh_io_sync) from [<80f0f638>] (bio_endio+0x124/0x338 block/bio.c:1436)
 r5:80f0f84c r4:8aecd780
[<80f0f514>] (bio_endio) from [<80f166cc>] (req_bio_endio block/blk-core.c:265 [inline])
[<80f0f514>] (bio_endio) from [<80f166cc>] (blk_update_request+0x220/0x724 block/blk-core.c:1456)
 r9:00000800 r8:0000000a r7:00000000 r6:87276040 r5:00000800 r4:8aecd780
[<80f164ac>] (blk_update_request) from [<80f23128>] (blk_mq_end_request+0x1c/0x144 block/blk-mq.c:564)
 r10:00000010 r9:859e8000 r8:8404ec98 r7:00000000 r6:00000004 r5:87276040
 r4:87276040
[<80f2310c>] (blk_mq_end_request) from [<811d1e2c>] (lo_complete_rq+0x98/0xd4 drivers/block/loop.c:497)
 r7:00000001 r6:00000004 r5:87276040 r4:ffffffc8
[<811d1d94>] (lo_complete_rq) from [<80f21ab4>] (blk_complete_reqs+0x5c/0x68 block/blk-mq.c:576)
 r5:00000005 r4:ffffffc8
[<80f21a58>] (blk_complete_reqs) from [<80f21b1c>] (blk_done_softirq+0x2c/0x30 block/blk-mq.c:581)
 r5:00000005 r4:83ed846c
[<80f21af0>] (blk_done_softirq) from [<802012fc>] (__do_softirq+0x204/0x7ac kernel/softirq.c:345)
 r5:00000005 r4:84004090
[<802010f8>] (__do_softirq) from [<8024e224>] (do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline])
[<802010f8>] (__do_softirq) from [<8024e224>] (invoke_softirq kernel/softirq.c:228 [inline])
[<802010f8>] (__do_softirq) from [<8024e224>] (__irq_exit_rcu+0x1d8/0x200 kernel/softirq.c:422)
 r10:859e9db0 r9:859e9e18 r8:00000001 r7:00000000 r6:83ed8498 r5:00000000
 r4:83ed9d00
[<8024e04c>] (__irq_exit_rcu) from [<8024e3d8>] (irq_exit+0x10/0x3c kernel/softirq.c:446)
 r5:00000000 r4:83ed8498
[<8024e3c8>] (irq_exit) from [<802d8a34>] (__handle_domain_irq+0xb4/0x120 kernel/irq/irqdesc.c:692)
[<802d8980>] (__handle_domain_irq) from [<810109b0>] (handle_domain_irq include/linux/irqdesc.h:176 [inline])
[<802d8980>] (__handle_domain_irq) from [<810109b0>] (gic_handle_irq+0x84/0xac drivers/irqchip/irq-gic.c:370)
 r10:858a1040 r9:40070193 r8:e000200c r7:83ed84bc r6:e0002000 r5:859e9e18
 r4:8404f4b4
[<8101092c>] (gic_handle_irq) from [<80200abc>] (__irq_svc+0x5c/0x94 arch/arm/kernel/entry-armv.S:205)
Exception stack(0x859e9e18 to 0x859e9e60)
9e00:                                                       00000001 83262ba0
9e20: 00000001 00000685 ddfe31c0 00000000 8ae52080 8404f128 00000000 82775ccc
9e40: 858a1040 859e9e7c 859e9e10 859e9e68 82773fac 8277cfbc 20070013 ffffffff
 r9:859e8000 r8:00000000 r7:859e9e4c r6:ffffffff r5:20070013 r4:8277cfbc
[<8277cf90>] (_raw_spin_unlock_irq) from [<8027f5a8>] (finish_lock_switch kernel/sched/core.c:4076 [inline])
[<8277cf90>] (_raw_spin_unlock_irq) from [<8027f5a8>] (finish_task_switch+0xac/0x258 kernel/sched/core.c:4193)
 r5:00000000 r4:ddfe31c0
[<8027f4fc>] (finish_task_switch) from [<82775ccc>] (context_switch kernel/sched/core.c:4327 [inline])
[<8027f4fc>] (finish_task_switch) from [<82775ccc>] (__schedule+0x3e4/0xcc8 kernel/sched/core.c:5075)
 r10:00000008 r9:00000000 r8:00000000 r7:ddfe31d0 r6:858a1040 r5:85290000
 r4:ddfe31c0
[<827758e8>] (__schedule) from [<8277660c>] (schedule+0x5c/0x108 kernel/sched/core.c:5154)
 r10:00000008 r9:859e8000 r8:84006d00 r7:ddfe2fb8 r6:ddfe2f80 r5:859e8000
 r4:858a1040
[<827765b0>] (schedule) from [<80269e44>] (worker_thread+0xdc/0x54c kernel/workqueue.c:2442)
 r5:ddfe2f80 r4:859feb00
[<80269d68>] (worker_thread) from [<80271f40>] (kthread+0x184/0x1a4 kernel/kthread.c:292)
 r10:85177e64 r9:859feb00 r8:80269d68 r7:00000000 r6:859e8000 r5:859ff7c0
 r4:85827280
[<80271dbc>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:158)
Exception stack(0x859e9fb0 to 0x859e9ff8)
9fa0:                                     00000000 00000000 00000000 00000000
9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80271dbc
 r4:859ff7c0