[ 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 '10.128.1.13' (ECDSA) to the list of known hosts. syzkaller login: [ 28.802717] IPVS: ftp: loaded support on port[0] = 21 executing program [ 28.885732] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 28.898548] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 28.911750] NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=16) [ 28.921617] Remounting filesystem read-only [ 28.926499] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 28.936071] NILFS error (device loop0): nilfs_bmap_last_key: broken bmap (inode number=16) [ 28.944769] NILFS (loop0): error -5 truncating bmap (ino=16) [ 28.955911] ------------[ cut here ]------------ [ 28.960797] WARNING: CPU: 1 PID: 7962 at include/linux/backing-dev.h:335 account_page_dirtied+0x8df/0xbb0 [ 28.970492] Kernel panic - not syncing: panic_on_warn set ... [ 28.970492] [ 28.977852] CPU: 1 PID: 7962 Comm: syz-executor176 Not tainted 4.14.295-syzkaller #0 [ 28.985712] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 28.995063] Call Trace: [ 28.997635] dump_stack+0x1b2/0x281 [ 29.001245] panic+0x1f9/0x42d [ 29.004420] ? add_taint.cold+0x16/0x16 [ 29.008384] ? account_page_dirtied+0x8df/0xbb0 [ 29.013037] ? account_page_dirtied+0x8df/0xbb0 [ 29.017687] __warn.cold+0x20/0x44 [ 29.021214] ? ist_end_non_atomic+0x10/0x10 [ 29.025536] ? account_page_dirtied+0x8df/0xbb0 [ 29.030192] report_bug+0x208/0x250 [ 29.033803] do_error_trap+0x195/0x2d0 [ 29.037670] ? math_error+0x2d0/0x2d0 [ 29.041450] ? deactivate_locked_super+0x6c/0xd0 [ 29.046186] ? deactivate_super+0x7f/0xa0 [ 29.050314] ? cleanup_mnt+0x186/0x2c0 [ 29.054182] ? trace_hardirqs_on+0x10/0x10 [ 29.058399] ? trace_hardirqs_on+0x10/0x10 [ 29.062615] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.067442] invalid_op+0x1b/0x40 [ 29.070878] RIP: 0010:account_page_dirtied+0x8df/0xbb0 [ 29.076133] RSP: 0018:ffff8880b31ef640 EFLAGS: 00010097 [ 29.081527] RAX: ffff8880b4b16680 RBX: ffff8880aec89480 RCX: 1ffffffff127a5d4 [ 29.088783] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000086 [ 29.096224] RBP: ffff88808db03b58 R08: ffffffff8ba5dc9c R09: 0000000000001cce [ 29.103477] R10: 0000000000000001 R11: ffff8880b4b16680 R12: ffffea00024d2cc0 [ 29.110734] R13: ffff88808db039c8 R14: ffff88808db039c8 R15: ffffea00024d2ce0 [ 29.118017] __set_page_dirty+0x77/0x2a0 [ 29.122080] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 29.127523] mark_buffer_dirty+0x307/0x480 [ 29.131744] nilfs_btree_propagate+0x3a3/0xc20 [ 29.136313] nilfs_bmap_propagate+0x73/0x160 [ 29.140704] nilfs_collect_dat_data+0x41/0xb0 [ 29.145182] nilfs_segctor_apply_buffers+0x191/0x450 [ 29.150266] ? nilfs_collect_file_bmap+0x70/0x70 [ 29.155001] nilfs_segctor_scan_file+0x366/0x630 [ 29.159738] ? nilfs_collect_file_data+0xb0/0xb0 [ 29.164476] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 29.169907] nilfs_segctor_do_construct+0x1420/0x78d0 [ 29.175102] ? nilfs_segctor_scan_file+0x630/0x630 [ 29.180013] ? lock_acquire+0x170/0x3f0 [ 29.183975] ? lock_downgrade+0x740/0x740 [ 29.188123] ? do_raw_spin_unlock+0x164/0x220 [ 29.192600] ? _raw_spin_unlock+0x29/0x40 [ 29.196735] nilfs_segctor_construct+0x6db/0x8e0 [ 29.201477] nilfs_detach_log_writer+0x398/0x980 [ 29.206219] ? nilfs_clean_segments+0x990/0x990 [ 29.210869] ? dispose_list+0x11c/0x1e0 [ 29.214824] ? evict_inodes+0x2cd/0x3a0 [ 29.218782] ? dispose_list+0x1e0/0x1e0 [ 29.222743] nilfs_put_super+0x3f/0x190 [ 29.226704] ? nilfs_freeze+0xb0/0xb0 [ 29.230484] generic_shutdown_super+0x144/0x370 [ 29.235137] kill_block_super+0x95/0xe0 [ 29.240401] deactivate_locked_super+0x6c/0xd0 [ 29.244964] deactivate_super+0x7f/0xa0 [ 29.248919] cleanup_mnt+0x186/0x2c0 [ 29.252628] task_work_run+0x11f/0x190 [ 29.256508] do_exit+0xa44/0x2850 [ 29.259951] ? __do_page_fault+0x571/0xad0 [ 29.264176] ? mm_update_next_owner+0x5b0/0x5b0 [ 29.268829] ? lock_downgrade+0x740/0x740 [ 29.272965] do_group_exit+0x100/0x2e0 [ 29.276836] SyS_exit_group+0x19/0x20 [ 29.280617] ? do_group_exit+0x2e0/0x2e0 [ 29.284657] do_syscall_64+0x1d5/0x640 [ 29.288530] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.293700] RIP: 0033:0x7fd90e77eb29 [ 29.297393] RSP: 002b:00007ffc29e95528 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 29.305082] RAX: ffffffffffffffda RBX: 00007fd90e7f6330 RCX: 00007fd90e77eb29 [ 29.312333] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 29.319589] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007fd90e7f0e40 [ 29.326838] R10: 00007ffc29e95440 R11: 0000000000000246 R12: 00007fd90e7f6330 [ 29.334095] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 29.341708] Kernel Offset: disabled [ 29.345385] Rebooting in 86400 seconds..