EXT4-fs error (device loop0): ext4_validate_block_bitmap:441: comm syz.0.0: bg 0: block 434: padding at end of block bitmap is not set
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!folio_buffers(folio)
WARNING: fs/ext4/inode.c:3938 at ext4_dirty_folio+0x167/0x1b0 fs/ext4/inode.c:3938, CPU#0: syz.0.0/5331
Modules linked in:
CPU: 0 UID: 0 PID: 5331 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:3938
Code: 4f ec a7 ff 49 83 3f 00 74 1a e8 b4 1a 3b ff 4c 89 e7 48 89 de 5b 41 5c 41 5d 41 5e 41 5f 5d e9 7f 93 cd ff e8 9a 1a 3b ff 90 <0f> 0b 90 eb e0 e8 8f 1a 3b ff 90 0f 0b 90 eb a7 e8 84 1a 3b ff 48
RSP: 0018:ffffc90006cd7520 EFLAGS: 00010283
RAX: ffffffff828aaac6 RBX: ffffea00008fa0c0 RCX: 0000000000100000
RDX: ffffc90021003000 RSI: 0000000000008196 RDI: 0000000000008197
RBP: 1ffffd400011f418 R08: ffffea00008fa0c7 R09: 1ffffd400011f418
R10: dffffc0000000000 R11: fffff9400011f419 R12: ffff888046e20db0
R13: 1ffffd400011f419 R14: 0000000000000001 R15: ffffea00008fa0e8
FS:  00007f325d1946c0(0000) GS:ffff88808c87b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f325d173000 CR3: 0000000011dd5000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 bio_set_pages_dirty+0x38e/0xaa0 block/bio.c:1658
 __blkdev_direct_IO+0x859/0xfa0 block/fops.c:248
 blkdev_direct_IO+0x121a/0x1790 block/fops.c:436
 blkdev_read_iter+0x23d/0x440 block/fops.c:839
 aio_read+0x33a/0x4d0 fs/aio.c:1657
 __io_submit_one fs/aio.c:-1 [inline]
 io_submit_one+0x79d/0x14c0 fs/aio.c:2107
 __do_sys_io_submit fs/aio.c:2166 [inline]
 __se_sys_io_submit+0x195/0x340 fs/aio.c:2136
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0x560 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f325c39ce59
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:00007f325d193fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007f325c616090 RCX: 00007f325c39ce59
RDX: 00002000000000c0 RSI: 00000000000000ca RDI: 00007f325d173000
RBP: 00007f325c432d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f325c616128 R14: 00007f325c616090 R15: 00007ffe59573e98
 </TASK>