------------[ 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.0.0/5332
Modules linked in:
CPU: 0 UID: 0 PID: 5332 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 ef a7 ff 49 83 3f 00 74 1a e8 94 1c 3b ff 4c 89 e7 48 89 de 5b 41 5c 41 5d 41 5e 41 5f 5d e9 ef 94 cd ff e8 7a 1c 3b ff 90 <0f> 0b 90 eb e0 e8 6f 1c 3b ff 90 0f 0b 90 eb a7 e8 64 1c 3b ff 48
RSP: 0018:ffffc90007ecf940 EFLAGS: 00010283
RAX: ffffffff828aa8f6 RBX: ffffea0001548a80 RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 00000000000000ca RDI: 00000000000000cb
RBP: 1ffffd40002a9150 R08: ffffea0001548a87 R09: 1ffffd40002a9150
R10: dffffc0000000000 R11: fffff940002a9151 R12: ffff888046e32070
R13: 1ffffd40002a9151 R14: 0000000000000001 R15: ffffea0001548aa8
FS:  00007fccd87a36c0(0000) GS:ffff88808c87b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000152000 CR3: 0000000036626000 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+0x15f/0x560 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fccd799ce59
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:00007fccd87a2fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fccd7c16090 RCX: 00007fccd799ce59
RDX: 0000000000002020 RSI: 0000200000002140 RDI: 0000000000000005
RBP: 00007fccd7a32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fccd7c16128 R14: 00007fccd7c16090 R15: 00007ffe7b407108
 </TASK>