------------[ cut here ]------------
!folio_buffers(folio)
WARNING: fs/ext4/inode.c:3923 at ext4_dirty_folio+0x167/0x1b0 fs/ext4/inode.c:3923, CPU#1: syz.4.96/6690
Modules linked in:
CPU: 1 UID: 0 PID: 6690 Comm: syz.4.96 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:ext4_dirty_folio+0x167/0x1b0 fs/ext4/inode.c:3923
Code: 3f bf ac ff 49 83 3f 00 74 1a e8 d4 9a 46 ff 4c 89 e7 48 89 de 5b 41 5c 41 5d 41 5e 41 5f 5d e9 ff b9 cd ff e8 ba 9a 46 ff 90 <0f> 0b 90 eb e0 e8 af 9a 46 ff 90 0f 0b 90 eb a7 e8 a4 9a 46 ff 48
RSP: 0018:ffffc90004a57930 EFLAGS: 00010283
RAX: ffffffff827deb06 RBX: ffffea000103ce40 RCX: 0000000000080000
RDX: ffffc9001373c000 RSI: 00000000000000a7 RDI: 00000000000000a8
RBP: 1ffffd40002079c8 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff940002079c9 R12: ffff88804055d8a8
R13: 1ffffd40002079c9 R14: 0000000000000001 R15: ffffea000103ce68
FS:  00007f4c5fcc46c0(0000) GS:ffff888126432000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562ed909d620 CR3: 000000003c74e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 folio_mark_dirty_lock+0xa8/0xe0 mm/page-writeback.c:2818
 set_page_dirty_lock+0x5e/0x130 mm/folio-compat.c:52
 fuse_copy_finish+0x10d/0x440 fs/fuse/dev.c:860
 fuse_dev_do_read+0xd12/0x1280 fs/fuse/dev.c:1500
 fuse_dev_read+0x16a/0x200 fs/fuse/dev.c:1585
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x58b/0xa80 fs/read_write.c:574
 ksys_read+0x156/0x270 fs/read_write.c:717
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4c69eac819
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:00007f4c5fcc4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f4c6a126180 RCX: 00007f4c69eac819
RDX: 0000000000002020 RSI: 0000200000000540 RDI: 000000000000000b
RBP: 00007f4c69f42c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4c6a126218 R14: 00007f4c6a126180 R15: 00007ffdc1768cd8
 </TASK>