------------[ cut here ]------------
!folio_buffers(folio)
WARNING: fs/ext4/inode.c:3938 at ext4_dirty_folio+0x167/0x1b0 fs/ext4/inode.c:3938, CPU#0: syz.0.0/5338
Modules linked in:
CPU: 0 UID: 0 PID: 5338 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: 6f fa a7 ff 49 83 3f 00 74 1a e8 d4 13 3b ff 4c 89 e7 48 89 de 5b 41 5c 41 5d 41 5e 41 5f 5d e9 7f 93 cd ff e8 ba 13 3b ff 90 <0f> 0b 90 eb e0 e8 af 13 3b ff 90 0f 0b 90 eb a7 e8 a4 13 3b ff 48
RSP: 0018:ffffc9000fcd7940 EFLAGS: 00010287
RAX: ffffffff828ab256 RBX: ffffea00004cdd00 RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 00000000000000c9 RDI: 00000000000000ca
RBP: 1ffffd4000099ba0 R08: ffffea00004cdd07 R09: 1ffffd4000099ba0
R10: dffffc0000000000 R11: fffff94000099ba1 R12: ffff888047a0f470
R13: 1ffffd4000099ba1 R14: 0000000000000001 R15: ffffea00004cdd28
FS:  00007f68ba3f56c0(0000) GS:ffff88808c891000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000cffc CR3: 00000000328aa000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 folio_mark_dirty_lock+0xa8/0xe0 mm/page-writeback.c:2814
 set_page_dirty_lock+0x44/0x50 mm/folio-compat.c:52
 fuse_copy_finish+0x10d/0x360 fs/fuse/dev.c:866
 fuse_dev_do_read+0xd0c/0x1280 fs/fuse/dev.c:1509
 fuse_dev_read+0x16a/0x200 fs/fuse/dev.c:1586
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x582/0xa70 fs/read_write.c:574
 ksys_read+0x150/0x270 fs/read_write.c:717
 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: 0033:0x7f68bdf5d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f68ba3f4f28 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f68ba3f56c0 RCX: 00007f68bdf5d68e
RDX: 0000000000002000 RSI: 0000200000004180 RDI: 0000000000000005
RBP: 00007f68be032d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00002000000000c0 R14: 00007f68be216090 R15: 00007fff74036758
 </TASK>