[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.253' (ECDSA) to the list of known hosts. syzkaller login: [ 32.157803] IPVS: ftp: loaded support on port[0] = 21 executing program [ 32.323032] F2FS-fs (loop0): Found nat_bits in checkpoint [ 32.355275] F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5 [ 32.427487] ------------[ cut here ]------------ [ 32.432324] kernel BUG at fs/f2fs/node.c:2780! [ 32.436979] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 32.442333] Modules linked in: [ 32.445509] CPU: 1 PID: 7995 Comm: syz-executor205 Not tainted 4.14.305-syzkaller #0 [ 32.453367] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 32.462718] task: ffff8880a93ea0c0 task.stack: ffff8880b3f30000 [ 32.468770] RIP: 0010:destroy_node_manager+0x4f4/0x780 [ 32.474163] RSP: 0018:ffff8880b3f377b0 EFLAGS: 00010297 [ 32.479506] RAX: ffff8880a93ea0c0 RBX: ffff8880965ff7b0 RCX: dffffc0000000000 [ 32.486754] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880965ff7d4 [ 32.493999] RBP: ffff8880965ff6c0 R08: ffffffff8b9e3a00 R09: 0000000000040585 [ 32.501345] R10: ffff8880a93ea970 R11: ffff8880a93ea0c0 R12: ffff8880965ff7d8 [ 32.508689] R13: ffffed1012b27006 R14: ffff8880965ff7b0 R15: ffff888095938000 [ 32.515957] FS: 0000555556429300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 32.524174] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.530047] CR2: 00007f1aaf6b9140 CR3: 0000000008e6a000 CR4: 00000000003406e0 [ 32.537302] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.544573] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.551824] Call Trace: [ 32.554396] ? build_node_manager+0x1d50/0x1d50 [ 32.559050] ? trace_hardirqs_on+0x10/0x10 [ 32.563278] ? debug_object_activate+0x292/0x490 [ 32.568016] ? mark_held_locks+0xa6/0xf0 [ 32.572076] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 32.577248] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 32.582251] ? debug_object_active_state+0x236/0x330 [ 32.587339] ? mark_held_locks+0xa6/0xf0 [ 32.591382] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 32.596505] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 32.601504] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 32.606591] ? debug_object_active_state+0x236/0x330 [ 32.611688] ? debug_object_free+0x320/0x320 [ 32.616251] ? lock_acquire+0x170/0x3f0 [ 32.620210] ? mark_held_locks+0xa6/0xf0 [ 32.624264] ? check_preemption_disabled+0x35/0x240 [ 32.629261] ? __call_rcu.constprop.0+0x245/0x7d0 [ 32.634081] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 32.639074] ? f2fs_drop_inode+0x7f0/0x7f0 [ 32.643291] ? destroy_inode+0xb9/0x110 [ 32.647261] ? iput+0x458/0x7e0 [ 32.650539] ? f2fs_show_options+0xdf0/0xdf0 [ 32.654926] f2fs_put_super+0x3e1/0x840 [ 32.658892] ? f2fs_quota_off_umount+0xb0/0xb0 [ 32.663454] ? dispose_list+0x1e0/0x1e0 [ 32.667407] ? fsnotify_unmount_inodes+0x1b4/0x210 [ 32.672324] ? f2fs_quota_off_umount+0xb0/0xb0 [ 32.676886] generic_shutdown_super+0x144/0x370 [ 32.681532] kill_block_super+0x95/0xe0 [ 32.685482] deactivate_locked_super+0x6c/0xd0 [ 32.690141] deactivate_super+0x7f/0xa0 [ 32.694094] cleanup_mnt+0x186/0x2c0 [ 32.697791] task_work_run+0x11f/0x190 [ 32.701668] do_exit+0xa44/0x2850 [ 32.707721] ? __do_page_fault+0x571/0xad0 [ 32.712116] ? mm_update_next_owner+0x5b0/0x5b0 [ 32.716857] ? lock_downgrade+0x740/0x740 [ 32.720992] do_group_exit+0x100/0x2e0 [ 32.724864] SyS_exit_group+0x19/0x20 [ 32.728652] ? do_group_exit+0x2e0/0x2e0 [ 32.732697] do_syscall_64+0x1d5/0x640 [ 32.736581] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 32.741752] RIP: 0033:0x7f1aaf6409e9 [ 32.745443] RSP: 002b:00007ffdb88d5f88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 32.753131] RAX: ffffffffffffffda RBX: 00007f1aaf6bb330 RCX: 00007f1aaf6409e9 [ 32.760384] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 32.767648] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f1aaf6b5e40 [ 32.774913] R10: 00007ffdb88d5ea0 R11: 0000000000000246 R12: 00007f1aaf6bb330 [ 32.782166] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 32.789420] Code: 40 6c 00 00 00 00 48 81 c4 d8 03 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 ea 38 89 fe 0f 0b e8 e3 38 89 fe 0f 0b e8 dc 38 89 fe <0f> 0b e8 d5 38 89 fe 0f 0b e8 ce 38 89 fe 48 8b 7c 24 28 e8 e4 [ 32.808554] RIP: destroy_node_manager+0x4f4/0x780 RSP: ffff8880b3f377b0 [ 32.815571] ---[ end trace 42b9f01df5c3c5cd ]--- [ 32.820363] Kernel panic - not syncing: Fatal exception [ 32.825989] Kernel Offset: disabled [ 32.829609] Rebooting in 86400 seconds..