================================
WARNING: inconsistent lock state
5.12.0-rc2-syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-R} usage.
udevd/4626 [HC0[0]:SC1[1]:HE0:SE0] takes:
8a5c426c (&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: 83805
hardirqs last  enabled at (83804): [<802011ec>] __do_softirq+0xf4/0x7ac kernel/softirq.c:329
hardirqs last disabled at (83805): [<8277d260>] __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:157 [inline]
hardirqs last disabled at (83805): [<8277d260>] _raw_read_lock_irqsave+0x84/0x88 kernel/locking/spinlock.c:231
softirqs last  enabled at (83780): [<8020167c>] __do_softirq+0x584/0x7ac kernel/softirq.c:372
softirqs last disabled at (83803): [<8024e224>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (83803): [<8024e224>] invoke_softirq kernel/softirq.c:228 [inline]
softirqs last disabled at (83803): [<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 ***

2 locks held by udevd/4626:
 #0: 8501c29c (sb_writers){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2319 [inline]
 #0: 8501c29c (sb_writers){.+.+}-{0:0}, at: filemap_read+0x4d4/0x4e0 mm/filemap.c:2530
 #1: 8a5c4010 (&ni->size_lock){...-}-{2:2}, at: ntfs_end_buffer_async_read+0x6c/0x558 fs/ntfs/aops.c:66

stack backtrace:
CPU: 0 PID: 4626 Comm: udevd 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 r6:60070193 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)
 r7:88a8a748 r6:82803274 r5:848a35c4 r4:88a8a080
[<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 r5:88a8a748
 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)
 r10:88a8a748 r9:88a8a080 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
 r4:8a1a19b8
[<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
 r4:8a5c426c
[<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)
 r10:8a5c4000 r9:60070193 r8:8052dcb4 r7:8a5c426c r6:df3f8860 r5:8a4ce120
 r4:8a5c41c8
[<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 r6:8728b900 r5:8a4ce120
 r4:8ae2e540
[<8052dc7c>] (end_bio_bh_io_sync) from [<80f0f638>] (bio_endio+0x124/0x338 block/bio.c:1436)
 r5:80f0f84c r4:8ae2e540
[<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 r6:8728b900 r5:00000800 r4:8ae2e540
[<80f164ac>] (blk_update_request) from [<80f23128>] (blk_mq_end_request+0x1c/0x144 block/blk-mq.c:564)
 r10:00000010 r9:8a1a0000 r8:8404ec98 r7:00000000 r6:00000004 r5:8728b900
 r4:8728b900
[<80f2310c>] (blk_mq_end_request) from [<811d1e2c>] (lo_complete_rq+0x98/0xd4 drivers/block/loop.c:497)
 r7:00000003 r6:00000004 r5:8728b900 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)
 r10:8a1a1c68 r9:8a1a1cd0 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)
 r10:8a1a1ef0 r9:40070193 r8:e000200c r7:83ed84bc r6:e0002000 r5:8a1a1cd0
 r4:8404f4b4
[<8101092c>] (gic_handle_irq) from [<80200abc>] (__irq_svc+0x5c/0x94 arch/arm/kernel/entry-armv.S:205)
Exception stack(0x8a1a1cd0 to 0x8a1a1d18)
1cc0:                                     88c11310 8301b510 00000000 00000000
1ce0: 00000001 80420cdc 87231e28 88c11310 8501c000 60070013 8a1a1ef0 8a1a1d7c
1d00: 8a1a1c58 8a1a1d20 80500bec 8050786c 60070013 ffffffff
 r9:8a1a0000 r8:8501c000 r7:8a1a1d04 r6:ffffffff r5:60070013 r4:8050786c
[<80500ad8>] (touch_atime) from [<80420cdc>] (file_accessed include/linux/fs.h:2319 [inline])
[<80500ad8>] (touch_atime) from [<80420cdc>] (filemap_read+0x4d4/0x4e0 mm/filemap.c:2530)
 r9:86838408 r8:8a1a1dc8 r7:8a1a1f08 r6:00000001 r5:8a1a1dc8 r4:00000001
[<80420808>] (filemap_read) from [<80420e80>] (generic_file_read_iter+0x198/0x234 mm/filemap.c:2609)
 r10:868384ac r9:00000001 r8:80537854 r7:00000040 r6:00000000 r5:8a1a1ef0
 r4:8a1a1f08
[<80420ce8>] (generic_file_read_iter) from [<80537854>] (blkdev_read_iter+0xf0/0x144 fs/block_dev.c:1714)
 r10:868384ac r9:00000001 r8:20070013 r7:8a1a1ef0 r6:804da1ec r5:8a1a1f08
 r4:86838408
[<80537764>] (blkdev_read_iter) from [<804da1ec>] (call_read_iter include/linux/fs.h:1971 [inline])
[<80537764>] (blkdev_read_iter) from [<804da1ec>] (new_sync_read fs/read_write.c:415 [inline])
[<80537764>] (blkdev_read_iter) from [<804da1ec>] (vfs_read+0x214/0x33c fs/read_write.c:496)
 r10:00000000 r9:8a1a1f68 r8:00000000 r7:00000000 r6:8ae63280 r5:00000000
 r4:00000040
[<804d9fd8>] (vfs_read) from [<804da6cc>] (ksys_read+0x68/0xec fs/read_write.c:634)
 r10:00000003 r9:8a1a0000 r8:80200224 r7:00000000 r6:003e0000 r5:8ae63280
 r4:8ae63280
[<804da664>] (ksys_read) from [<804da760>] (__do_sys_read fs/read_write.c:644 [inline])
[<804da664>] (ksys_read) from [<804da760>] (sys_read+0x10/0x14 fs/read_write.c:642)
 r7:00000003 r6:76f2a840 r5:01459958 r4:014573c0
[<804da750>] (sys_read) from [<80200060>] (ret_fast_syscall+0x0/0x2c arch/arm/mm/proc-v7.S:64)
Exception stack(0x8a1a1fa8 to 0x8a1a1ff0)
1fa0:                   014573c0 01459958 00000009 014573e0 00000040 00000000
1fc0: 014573c0 01459958 76f2a840 00000003 014573d8 00000000 003e0000 00000000
1fe0: 76efb080 7e8dc238 76ebc814 76bf46f8