[ 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 '10.128.1.99' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.687295] IPVS: ftp: loaded support on port[0] = 21 [ 34.767892] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 34.806132] WARNING: CPU: 1 PID: 8119 at include/linux/backing-dev.h:340 account_page_dirtied+0x8cc/0xbb0 [ 34.815973] Kernel panic - not syncing: panic_on_warn set ... [ 34.815973] [ 34.823332] CPU: 1 PID: 8119 Comm: segctord Not tainted 4.19.211-syzkaller #0 [ 34.830587] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 34.839925] Call Trace: [ 34.842504] dump_stack+0x1fc/0x2ef [ 34.846122] panic+0x26a/0x50e [ 34.849302] ? __warn_printk+0xf3/0xf3 [ 34.853190] ? account_page_dirtied+0x8cc/0xbb0 [ 34.857845] ? __probe_kernel_read+0x130/0x1b0 [ 34.862421] ? __warn.cold+0x5/0x5a [ 34.866033] ? __warn+0xe4/0x200 [ 34.869387] ? account_page_dirtied+0x8cc/0xbb0 [ 34.874048] __warn.cold+0x20/0x5a [ 34.877579] ? account_page_dirtied+0x8cc/0xbb0 [ 34.882242] report_bug+0x262/0x2b0 [ 34.885863] do_error_trap+0x1d7/0x310 [ 34.889738] ? math_error+0x310/0x310 [ 34.893530] ? nilfs_segctor_construct+0x764/0xae0 [ 34.898457] ? nilfs_segctor_thread+0x3cb/0xf50 [ 34.903116] ? mark_held_locks+0xf0/0xf0 [ 34.907171] ? error_entry+0x72/0xd0 [ 34.910873] ? trace_hardirqs_off_caller+0x2c/0x210 [ 34.915880] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.920718] invalid_op+0x14/0x20 [ 34.924164] RIP: 0010:account_page_dirtied+0x8cc/0xbb0 [ 34.929430] 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 [ 34.948330] RSP: 0018:ffff8880b3327868 EFLAGS: 00010093 [ 34.953682] RAX: ffff8880b05404c0 RBX: 0000000000000000 RCX: ffffffff817fd2ef [ 34.961111] RDX: 0000000000000000 RSI: ffffffff817fd2fc RDI: 0000000000000005 [ 34.968366] RBP: ffff88808b029b48 R08: 0000000000000000 R09: 0000000000000000 [ 34.975626] R10: 0000000000000005 R11: 0000000000000000 R12: ffffea0002d12540 [ 34.982881] R13: ffff88808b0299c0 R14: ffff88808b029838 R15: ffffea0002d12548 [ 34.990156] ? account_page_dirtied+0x8bf/0xbb0 [ 34.994812] ? account_page_dirtied+0x8cc/0xbb0 [ 34.999472] ? account_page_dirtied+0x8cc/0xbb0 [ 35.004134] __set_page_dirty+0x7f/0x3e0 [ 35.008185] ? lock_page_memcg+0xa7/0x220 [ 35.012329] mark_buffer_dirty+0x424/0x5c0 [ 35.016555] nilfs_btree_propagate+0x728/0xd80 [ 35.021131] nilfs_bmap_propagate+0x73/0x170 [ 35.025533] nilfs_collect_dat_data+0x45/0xd0 [ 35.030022] nilfs_segctor_apply_buffers+0x14a/0x490 [ 35.035121] ? nilfs_collect_file_bmap+0x70/0x70 [ 35.039870] nilfs_segctor_scan_file+0x3f4/0x6f0 [ 35.044619] ? nilfs_collect_file_data+0xd0/0xd0 [ 35.049371] ? check_preemption_disabled+0x41/0x280 [ 35.054394] nilfs_segctor_do_construct+0x1562/0x8360 [ 35.059589] ? nilfs_segctor_scan_file+0x6f0/0x6f0 [ 35.064512] ? lock_downgrade+0x720/0x720 [ 35.068672] ? lock_acquire+0x170/0x3c0 [ 35.072648] ? nilfs_segctor_confirm+0xe1/0x180 [ 35.077313] ? do_raw_spin_unlock+0x171/0x230 [ 35.081799] ? _raw_spin_unlock+0x29/0x40 [ 35.085938] nilfs_segctor_construct+0x764/0xae0 [ 35.090688] nilfs_segctor_thread+0x3cb/0xf50 [ 35.095178] ? nilfs_segctor_construct+0xae0/0xae0 [ 35.100095] ? __kthread_parkme+0x5d/0x1e0 [ 35.104320] ? wait_woken+0x250/0x250 [ 35.108110] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 35.112682] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 35.117773] ? __kthread_parkme+0x133/0x1e0 [ 35.122086] ? nilfs_segctor_construct+0xae0/0xae0 [ 35.127005] kthread+0x33f/0x460 [ 35.130363] ? kthread_park+0x180/0x180 [ 35.134330] ret_from_fork+0x24/0x30 [ 35.138470] Kernel Offset: disabled [ 35.142151] Rebooting in 86400 seconds..