[ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.203' (ECDSA) to the list of known hosts. syzkaller login: [ 33.468937] IPVS: ftp: loaded support on port[0] = 21 executing program [ 33.541130] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 33.572051] WARNING: CPU: 0 PID: 8107 at include/linux/backing-dev.h:340 account_page_dirtied+0x8cc/0xbb0 [ 33.581921] Kernel panic - not syncing: panic_on_warn set ... [ 33.581921] [ 33.589286] CPU: 0 PID: 8107 Comm: segctord Not tainted 4.19.211-syzkaller #0 [ 33.596546] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 [ 33.605883] Call Trace: [ 33.608555] dump_stack+0x1fc/0x2ef [ 33.612167] panic+0x26a/0x50e [ 33.615346] ? __warn_printk+0xf3/0xf3 [ 33.619222] ? account_page_dirtied+0x8cc/0xbb0 [ 33.623873] ? __probe_kernel_read+0x130/0x1b0 [ 33.628436] ? __warn.cold+0x5/0x5a [ 33.632044] ? __warn+0xe4/0x200 [ 33.635409] ? account_page_dirtied+0x8cc/0xbb0 [ 33.640082] __warn.cold+0x20/0x5a [ 33.643604] ? account_page_dirtied+0x8cc/0xbb0 [ 33.648264] report_bug+0x262/0x2b0 [ 33.651929] do_error_trap+0x1d7/0x310 [ 33.655796] ? math_error+0x310/0x310 [ 33.659578] ? nilfs_segctor_construct+0x764/0xae0 [ 33.664488] ? nilfs_segctor_thread+0x3cb/0xf50 [ 33.669145] ? mark_held_locks+0xf0/0xf0 [ 33.673206] ? error_entry+0x72/0xd0 [ 33.676901] ? trace_hardirqs_off_caller+0x2c/0x210 [ 33.681904] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.686729] invalid_op+0x14/0x20 [ 33.690176] RIP: 0010:account_page_dirtied+0x8cc/0xbb0 [ 33.695432] Code: 88 01 00 00 be ff ff ff ff 48 8d 78 70 e8 ec e1 ca ff 31 ff 89 c3 89 c6 e8 f1 b3 e2 ff 85 db 0f 85 39 f9 ff ff e8 74 b2 e2 ff <0f> 0b e9 2d f9 ff ff e8 68 b2 e2 ff 4c 89 e6 4c 89 ef e8 9d b3 2d [ 33.714322] RSP: 0018:ffff888095237868 EFLAGS: 00010093 [ 33.719662] RAX: ffff8880b307c240 RBX: 0000000000000000 RCX: ffffffff817fd2ef [ 33.726909] RDX: 0000000000000000 RSI: ffffffff817fd2fc RDI: 0000000000000005 [ 33.734159] RBP: ffff88808ac97b48 R08: 0000000000000000 R09: 0000000000000000 [ 33.741407] R10: 0000000000000005 R11: 0000000000000000 R12: ffffea0002ab3900 [ 33.748652] R13: ffff88808ac979c0 R14: ffff88808ac97838 R15: ffffea0002ab3908 [ 33.755926] ? account_page_dirtied+0x8bf/0xbb0 [ 33.760576] ? account_page_dirtied+0x8cc/0xbb0 [ 33.765226] ? account_page_dirtied+0x8cc/0xbb0 [ 33.769875] __set_page_dirty+0x7f/0x3e0 [ 33.773920] ? lock_page_memcg+0xa7/0x220 [ 33.778050] mark_buffer_dirty+0x424/0x5c0 [ 33.782270] nilfs_btree_propagate+0x728/0xd80 [ 33.786835] nilfs_bmap_propagate+0x73/0x170 [ 33.791230] nilfs_collect_dat_data+0x45/0xd0 [ 33.795707] nilfs_segctor_apply_buffers+0x14a/0x490 [ 33.800788] ? nilfs_collect_file_bmap+0x70/0x70 [ 33.805635] nilfs_segctor_scan_file+0x475/0x6f0 [ 33.810384] ? nilfs_collect_file_data+0xd0/0xd0 [ 33.815124] ? check_preemption_disabled+0x41/0x280 [ 33.820124] nilfs_segctor_do_construct+0x1562/0x8360 [ 33.825317] ? nilfs_segctor_scan_file+0x6f0/0x6f0 [ 33.830255] ? lock_downgrade+0x720/0x720 [ 33.834420] ? lock_acquire+0x170/0x3c0 [ 33.838405] ? nilfs_segctor_confirm+0xe1/0x180 [ 33.843059] ? do_raw_spin_unlock+0x171/0x230 [ 33.847537] ? _raw_spin_unlock+0x29/0x40 [ 33.851670] nilfs_segctor_construct+0x764/0xae0 [ 33.856407] nilfs_segctor_thread+0x3cb/0xf50 [ 33.860887] ? nilfs_segctor_construct+0xae0/0xae0 [ 33.865813] ? __kthread_parkme+0x5d/0x1e0 [ 33.870045] ? wait_woken+0x250/0x250 [ 33.873833] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.878483] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 33.883567] ? __kthread_parkme+0x133/0x1e0 [ 33.887930] ? nilfs_segctor_construct+0xae0/0xae0 [ 33.892857] kthread+0x33f/0x460 [ 33.896226] ? kthread_park+0x180/0x180 [ 33.900195] ret_from_fork+0x24/0x30 [ 33.904316] Kernel Offset: disabled [ 33.908006] Rebooting in 86400 seconds..