================================
WARNING: inconsistent lock state
5.12.0-rc2-syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-R} usage.
ksoftirqd/0/12 [HC0[0]:SC1[1]:HE0:SE0] takes:
8a16826c (&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: 251165
hardirqs last  enabled at (251164): [<802011ec>] __do_softirq+0xf4/0x7ac kernel/softirq.c:329
hardirqs last disabled at (251165): [<8277d260>] __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:157 [inline]
hardirqs last disabled at (251165): [<8277d260>] _raw_read_lock_irqsave+0x84/0x88 kernel/locking/spinlock.c:231
softirqs last  enabled at (251158): [<8020167c>] __do_softirq+0x584/0x7ac kernel/softirq.c:372
softirqs last disabled at (251163): [<8024e29c>] run_ksoftirqd kernel/softirq.c:652 [inline]
softirqs last disabled at (251163): [<8024e29c>] run_ksoftirqd+0x50/0x78 kernel/softirq.c:644

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 ksoftirqd/0/12:
 #0: 8a168010 (&ni->size_lock){...-}-{2:2}, at: ntfs_end_buffer_async_read+0x6c/0x558 fs/ntfs/aops.c:66

stack backtrace:
CPU: 0 PID: 12 Comm: ksoftirqd/0 Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<82740468>] (dump_backtrace) from [<827406dc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:252)
 r7:00000080 r6:60000093 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)
 r7:8514c7a8 r6:82803274 r5:848a3560 r4:8514c100
[<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 r5:8514c7a8
 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)
 r10:8514c7a8 r9:8514c100 r8:00000001 r7:00040000 r6:00000238 r5:848a3560
 r4:00000000
[<802bbf88>] (__lock_acquire) from [<802bfe90>] (lock_acquire.part.0+0xf0/0x41c kernel/locking/lockdep.c:5510)
 r10:00000080 r9:60000093 r8:00000000 r7:00000000 r6:83ecd680 r5:83ecd680
 r4:85159ca8
[<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
 r4:8a16826c
[<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)
 r10:8a168000 r9:60000093 r8:8052dcb4 r7:8a16826c r6:df467710 r5:8a0edba0
 r4:8a1681c8
[<808b1a44>] (ntfs_end_buffer_async_read) from [<8052dcb4>] (end_bio_bh_io_sync+0x38/0x54 fs/buffer.c:3006)
 r10:00000200 r9:00000200 r8:0000000a r7:00000000 r6:8727b680 r5:8a0edba0
 r4:8a794c00
[<8052dc7c>] (end_bio_bh_io_sync) from [<80f0f638>] (bio_endio+0x124/0x338 block/bio.c:1436)
 r5:80f0f84c r4:8a794c00
[<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)
 r9:00000200 r8:0000000a r7:00000000 r6:8727b680 r5:00000200 r4:8a794c00
[<80f164ac>] (blk_update_request) from [<80f23128>] (blk_mq_end_request+0x1c/0x144 block/blk-mq.c:564)
 r10:00000010 r9:85158000 r8:8404ec98 r7:00000000 r6:00000004 r5:8727b680
 r4:8727b680
[<80f2310c>] (blk_mq_end_request) from [<811d1e2c>] (lo_complete_rq+0x98/0xd4 drivers/block/loop.c:497)
 r7:00000003 r6:00000004 r5:8727b680 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 [<8024e29c>] (run_ksoftirqd kernel/softirq.c:652 [inline])
[<802010f8>] (__do_softirq) from [<8024e29c>] (run_ksoftirqd+0x50/0x78 kernel/softirq.c:644)
 r10:00000001 r9:802799ec r8:8406b618 r7:850e5340 r6:00000000 r5:00000000
 r4:85158000
[<8024e24c>] (run_ksoftirqd) from [<80279b90>] (smpboot_thread_fn+0x1d4/0x334 kernel/smpboot.c:165)
[<802799bc>] (smpboot_thread_fn) from [<80271f40>] (kthread+0x184/0x1a4 kernel/kthread.c:292)
 r10:8511bdc4 r9:850e5340 r8:802799bc r7:00000000 r6:85158000 r5:850e5380
 r4:850c9b00
[<80271dbc>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:158)
Exception stack(0x85159fb0 to 0x85159ff8)
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
 r4:850e5380