[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.10.21' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   33.370956] IPVS: ftp: loaded support on port[0] = 21
[   33.404805] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024)
[   33.423027] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[   33.447821] ------------[ cut here ]------------
[   33.452687] WARNING: CPU: 0 PID: 8020 at include/linux/backing-dev.h:334 account_page_dirtied+0x7c7/0xa20
[   33.462372] Kernel panic - not syncing: panic_on_warn set ...
[   33.462372] 
[   33.469717] CPU: 0 PID: 8020 Comm: segctord Not tainted 4.14.202-syzkaller #0
[   33.476965] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   33.486294] Call Trace:
[   33.488859]  dump_stack+0x1b2/0x283
[   33.492468]  panic+0x1f9/0x42d
[   33.495635]  ? add_taint.cold+0x16/0x16
[   33.499589]  ? account_page_dirtied+0x7c7/0xa20
[   33.504234]  ? account_page_dirtied+0x7c7/0xa20
[   33.508880]  __warn.cold+0x20/0x4b
[   33.512396]  ? ist_end_non_atomic+0x10/0x10
[   33.516692]  ? account_page_dirtied+0x7c7/0xa20
[   33.521339]  report_bug+0x208/0x249
[   33.524955]  do_error_trap+0x195/0x2d0
[   33.528819]  ? math_error+0x2d0/0x2d0
[   33.532605]  ? gfp_pfmemalloc_allowed+0x150/0x150
[   33.537422]  ? trace_hardirqs_on+0x10/0x10
[   33.541630]  ? trace_hardirqs_on+0x10/0x10
[   33.545840]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   33.550668]  invalid_op+0x1b/0x40
[   33.554097] RIP: 0010:account_page_dirtied+0x7c7/0xa20
[   33.559347] RSP: 0018:ffff888095a3f908 EFLAGS: 00010097
[   33.564686] RAX: ffff8880b43d4480 RBX: ffff8880af3ed4c0 RCX: 1ffffffff1279ee0
[   33.571931] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000082
[   33.579175] RBP: ffff88808daf1b58 R08: ffffffff8ba4497c R09: 0000000000001d7a
[   33.586428] R10: 0000000000000001 R11: ffff8880b43d4480 R12: ffffea0002843a40
[   33.593673] R13: ffff88808daf19c8 R14: ffff88808daf19c8 R15: ffffea0002843a60
[   33.600930]  ? account_page_dirtied+0x7c7/0xa20
[   33.605579]  __set_page_dirty+0x77/0x2a0
[   33.609627]  ? rcu_lockdep_current_cpu_online+0xed/0x140
[   33.615053]  mark_buffer_dirty+0x307/0x480
[   33.619268]  nilfs_btree_propagate+0x3a3/0xc20
[   33.623829]  nilfs_bmap_propagate+0x73/0x160
[   33.628215]  nilfs_collect_dat_data+0x41/0xb0
[   33.632684]  nilfs_segctor_apply_buffers+0x191/0x450
[   33.637763]  ? nilfs_collect_file_bmap+0x70/0x70
[   33.642495]  nilfs_segctor_scan_file+0x366/0x630
[   33.647236]  ? nilfs_collect_file_data+0xb0/0xb0
[   33.651986]  ? rcu_lockdep_current_cpu_online+0xed/0x140
[   33.657474]  nilfs_segctor_do_construct+0x1426/0x7910
[   33.662659]  ? nilfs_segctor_scan_file+0x630/0x630
[   33.667570]  ? lock_acquire+0x170/0x3f0
[   33.671523]  ? lock_downgrade+0x740/0x740
[   33.675650]  ? do_raw_spin_unlock+0x164/0x220
[   33.680141]  ? _raw_spin_unlock+0x29/0x40
[   33.684268]  nilfs_segctor_construct+0x6db/0x8e0
[   33.689004]  nilfs_segctor_thread+0x3ad/0xdb0
[   33.693490]  ? nilfs_segctor_construct+0x8e0/0x8e0
[   33.698395]  ? __schedule+0x893/0x1de0
[   33.702258]  ? kthread+0x287/0x420
[   33.705776]  ? wait_woken+0x230/0x230
[   33.709551]  ? _raw_spin_unlock_irqrestore+0x79/0xe0
[   33.714644]  ? nilfs_segctor_construct+0x8e0/0x8e0
[   33.719555]  kthread+0x30d/0x420
[   33.722898]  ? kthread_create_on_node+0xd0/0xd0
[   33.727543]  ret_from_fork+0x24/0x30
[   33.732019] Kernel Offset: disabled
[   33.735686] Rebooting in 86400 seconds..