------------[ cut here ]------------
!folio_buffers(folio)
WARNING: fs/ext4/inode.c:3923 at ext4_dirty_folio+0x167/0x1b0 fs/ext4/inode.c:3923, CPU#0: syz.1.2824/16248
Modules linked in:
CPU: 0 UID: 0 PID: 16248 Comm: syz.1.2824 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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: ff 95 a7 ff 49 83 3f 00 74 1a e8 a4 43 3d ff 4c 89 e7 48 89 de 5b 41 5c 41 5d 41 5e 41 5f 5d e9 cf 9a cd ff e8 8a 43 3d ff 90 <0f> 0b 90 eb e0 e8 7f 43 3d ff 90 0f 0b 90 eb a7 e8 74 43 3d ff 48
RSP: 0018:ffffc90004fef930 EFLAGS: 00010283
RAX: ffffffff82887c66 RBX: ffffea0001de4200 RCX: 0000000000080000
RDX: ffffc9000f341000 RSI: 00000000000000d5 RDI: 00000000000000d6
RBP: 1ffffd40003bc840 R08: ffffea0001de4207 R09: 1ffffd40003bc840
R10: dffffc0000000000 R11: fffff940003bc841 R12: ffff88807978ab18
R13: 1ffffd40003bc841 R14: 0000000000000001 R15: ffffea0001de4228
FS:  00007f150a2056c0(0000) GS:ffff888125454000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000007000 CR3: 0000000078a86000 CR4: 0000000000350ef0
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+0xd0c/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+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+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f150935d04e
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:00007f150a204f68 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f150a2056c0 RCX: 00007f150935d04e
RDX: 0000000000002000 RSI: 0000200000004180 RDI: 0000000000000007
RBP: 00007f1509432c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000007
R13: 00002000000004c0 R14: 00007f1509616090 R15: 00007ffe304fea38
 </TASK>