syzbot

raw: 05ffc00000004038 fffffdffc34980c8 fffffdffc37d8948 ffff0000de058220
raw: 000000000000000b 0000000000000009 00000003ffffffff ffff0000c19c0000
page dumped because: VM_BUG_ON_FOLIO(!folio_test_locked(folio))
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kernel BUG at mm/filemap.c:1498!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 153 Comm: kworker/u8:5 Not tainted 6.16.0-rc2-syzkaller-g9aa9b43d689e #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: writeback wb_workfn (flush-7:0)
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : folio_unlock+0xfc/0x120 mm/filemap.c:1498
lr : folio_unlock+0xfc/0x120 mm/filemap.c:1498
sp : ffff80009b8c6df0
x29: ffff80009b8c6df0 x28: 0000000000000003 x27: ffff80009b8c7480
x26: ffff0000c9acd15c x25: ffff80009b8c6f28 x24: 00003e0040000000
x23: fffffdffc37d9640 x22: dfff800000000000 x21: dfff800000000000
x20: 05ffc00000004038 x19: fffffdffc37d9640 x18: 00000000ffffffff
x17: 0000000000000000 x16: ffff80008ae33808 x15: ffff700011ed61d4
x14: 1ffff00011ed61d4 x13: 0000000000000004 x12: ffffffffffffffff
x11: ffff700011ed61d4 x10: 0000000000ff0100 x9 : 69a7ec46ede53500
x8 : 69a7ec46ede53500 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80009b8c64f8 x4 : ffff80008f727060 x3 : ffff80008054c348
x2 : 0000000000000000 x1 : 0000000100000000 x0 : 000000000000003f
Call trace:
 folio_unlock+0xfc/0x120 mm/filemap.c:1498 (P)
 f2fs_sync_node_pages+0x16bc/0x18d8 fs/f2fs/node.c:2081
 f2fs_write_node_pages+0x278/0x614 fs/f2fs/node.c:2183
 do_writepages+0x270/0x468 mm/page-writeback.c:2636
 __writeback_single_inode+0x15c/0x13e8 fs/fs-writeback.c:1680
 writeback_sb_inodes+0x558/0xe38 fs/fs-writeback.c:1976
 wb_writeback+0x3cc/0xd70 fs/fs-writeback.c:2156
 wb_do_writeback fs/fs-writeback.c:2303 [inline]
 wb_workfn+0x338/0xdc0 fs/fs-writeback.c:2343
 process_one_work+0x7e8/0x155c kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3321 [inline]
 worker_thread+0x958/0xed8 kernel/workqueue.c:3402
 kthread+0x5fc/0x75c kernel/kthread.c:464
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847
Code: b0053141 91050021 aa1303e0 94032ff0 (d4210000) 
---[ end trace 0000000000000000 ]---