EXT4-fs error (device loop0): ext4_validate_block_bitmap:441: comm syz.0.0: bg 0: block 299: padding at end of block bitmap is not set
------------[ cut here ]------------
!folio_buffers(folio)
WARNING: fs/ext4/inode.c:3939 at ext4_dirty_folio+0x167/0x1b0 fs/ext4/inode.c:3939, CPU#0: syz.0.0/5330
Modules linked in:
CPU: 0 UID: 0 PID: 5330 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:ext4_dirty_folio+0x167/0x1b0 fs/ext4/inode.c:3939
Code: 9f ee a6 ff 49 83 3f 00 74 1a e8 64 c8 37 ff 4c 89 e7 48 89 de 5b 41 5c 41 5d 41 5e 41 5f 5d e9 2f e2 cd ff e8 4a c8 37 ff 90 <0f> 0b 90 eb e0 e8 3f c8 37 ff 90 0f 0b 90 eb a7 e8 34 c8 37 ff 48
RSP: 0018:ffffc9000e87f528 EFLAGS: 00010283
RAX: ffffffff828eba46 RBX: ffffea00014a63c0 RCX: 0000000000100000
RDX: ffffc90020802000 RSI: 000000000000855c RDI: 000000000000855d
RBP: 1ffffd4000294c78 R08: ffffea00014a63c7 R09: 1ffffd4000294c78
R10: dffffc0000000000 R11: fffff94000294c79 R12: ffff888043dfb338
R13: 1ffffd4000294c79 R14: 0000000000000001 R15: ffffea00014a63e8
FS:  00007f47b08346c0(0000) GS:ffff88808c54e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f47b0811000 CR3: 000000001d12c000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 bio_set_pages_dirty+0x372/0xa70 block/bio.c:1667
 __blkdev_direct_IO+0x81f/0xf30 block/fops.c:247
 blkdev_direct_IO+0x122e/0x17a0 block/fops.c:435
 blkdev_read_iter+0x223/0x420 block/fops.c:814
 aio_read+0x33a/0x4d0 fs/aio.c:1656
 __io_submit_one fs/aio.c:-1 [inline]
 io_submit_one+0x774/0x13d0 fs/aio.c:2106
 __do_sys_io_submit fs/aio.c:2165 [inline]
 __se_sys_io_submit+0x195/0x340 fs/aio.c:2135
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f47af99de59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f47b0833fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007f47afc26090 RCX: 00007f47af99de59
RDX: 00002000000000c0 RSI: 00000000000000ca RDI: 00007f47b0811000
RBP: 00007f47afa33e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f47afc26128 R14: 00007f47afc26090 R15: 00007ffe4af57458
 </TASK>