__mmput+0x12a/0x410 kernel/fork.c:1121
 mmput+0x62/0x70 kernel/fork.c:1144
 exit_mm kernel/exit.c:581 [inline]
 do_exit+0x7bc/0x2bd0 kernel/exit.c:943
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1104
 get_signal+0x2673/0x26d0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x8f/0x7d0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x84/0x110 kernel/entry/common.c:111
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
kernel BUG at mm/filemap.c:1498!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 2933 Comm: kworker/u8:6 Not tainted 6.16.0-rc1-syzkaller-00003-gf09079bd04a9 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: writeback wb_workfn (flush-7:2)
RIP: 0010:folio_unlock mm/filemap.c:1498 [inline]
RIP: 0010:folio_unlock+0xb3/0xd0 mm/filemap.c:1493
Code: 13 a4 c9 ff 48 89 ef 31 f6 e8 f9 ed ff ff 5b 5d e9 02 a4 c9 ff e8 fd a3 c9 ff 48 c7 c6 20 0b b9 8b 48 89 ef e8 ee e4 11 00 90 <0f> 0b 48 89 df e8 23 6c 2f 00 e9 7b ff ff ff 66 66 2e 0f 1f 84 00
RSP: 0018:ffffc9000b347248 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88803050da00 RSI: ffffffff81f27812 RDI: ffff88803050de44
RBP: ffffea00011d7740 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90a82957 R11: 1ffff1100fa7980a R12: ffffc9000b347350
R13: 0000000000000002 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88812475b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30812ff8 CR3: 0000000058f2a000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 f2fs_sync_node_pages+0x184c/0x1c30 fs/f2fs/node.c:2081
 f2fs_write_node_pages+0x27d/0x7a0 fs/f2fs/node.c:2183
 do_writepages+0x27a/0x600 mm/page-writeback.c:2636
 __writeback_single_inode+0x160/0xfb0 fs/fs-writeback.c:1680
 writeback_sb_inodes+0x601/0xf90 fs/fs-writeback.c:1976
 wb_writeback+0x419/0xb70 fs/fs-writeback.c:2156
 wb_do_writeback fs/fs-writeback.c:2303 [inline]
 wb_workfn+0x14d/0xbe0 fs/fs-writeback.c:2343
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3321 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
 kthread+0x3c5/0x780 kernel/kthread.c:464
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:folio_unlock mm/filemap.c:1498 [inline]
RIP: 0010:folio_unlock+0xb3/0xd0 mm/filemap.c:1493
Code: 13 a4 c9 ff 48 89 ef 31 f6 e8 f9 ed ff ff 5b 5d e9 02 a4 c9 ff e8 fd a3 c9 ff 48 c7 c6 20 0b b9 8b 48 89 ef e8 ee e4 11 00 90 <0f> 0b 48 89 df e8 23 6c 2f 00 e9 7b ff ff ff 66 66 2e 0f 1f 84 00
RSP: 0018:ffffc9000b347248 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88803050da00 RSI: ffffffff81f27812 RDI: ffff88803050de44
RBP: ffffea00011d7740 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90a82957 R11: 1ffff1100fa7980a R12: ffffc9000b347350
R13: 0000000000000002 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88812475b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30812ff8 CR3: 0000000058f2a000 CR4: 0000000000350ef0