[ 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 '10.128.0.52' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.729992] IPVS: ftp: loaded support on port[0] = 21 [ 27.781952] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 27.792105] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 27.802277] NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=16) [ 27.812596] Remounting filesystem read-only [ 27.817911] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 27.827780] NILFS error (device loop0): nilfs_bmap_last_key: broken bmap (inode number=16) [ 27.836314] NILFS (loop0): error -5 truncating bmap (ino=16) [ 27.851425] ------------[ cut here ]------------ [ 27.856307] WARNING: CPU: 1 PID: 7976 at include/linux/backing-dev.h:335 account_page_dirtied+0x8df/0xbb0 [ 27.865998] Kernel panic - not syncing: panic_on_warn set ... [ 27.865998] [ 27.873343] CPU: 1 PID: 7976 Comm: syz-executor814 Not tainted 4.14.295-syzkaller #0 [ 27.881206] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 27.890540] Call Trace: [ 27.893113] dump_stack+0x1b2/0x281 [ 27.896725] panic+0x1f9/0x42d [ 27.899896] ? add_taint.cold+0x16/0x16 [ 27.903853] ? account_page_dirtied+0x8df/0xbb0 [ 27.908506] ? account_page_dirtied+0x8df/0xbb0 [ 27.913167] __warn.cold+0x20/0x44 [ 27.916786] ? ist_end_non_atomic+0x10/0x10 [ 27.921115] ? account_page_dirtied+0x8df/0xbb0 [ 27.925768] report_bug+0x208/0x250 [ 27.929391] do_error_trap+0x195/0x2d0 [ 27.933263] ? math_error+0x2d0/0x2d0 [ 27.937046] ? deactivate_locked_super+0x6c/0xd0 [ 27.941790] ? deactivate_super+0x7f/0xa0 [ 27.945919] ? cleanup_mnt+0x186/0x2c0 [ 27.949789] ? trace_hardirqs_on+0x10/0x10 [ 27.954004] ? trace_hardirqs_on+0x10/0x10 [ 27.958220] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.963065] invalid_op+0x1b/0x40 [ 27.966518] RIP: 0010:account_page_dirtied+0x8df/0xbb0 [ 27.971772] RSP: 0018:ffff8880b3507640 EFLAGS: 00010097 [ 27.977123] RAX: ffff8880b31f8380 RBX: ffff8880aec7c380 RCX: 1ffffffff127a5d4 [ 27.984383] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000086 [ 27.991636] RBP: ffff88808df8cb58 R08: ffffffff8ba5d9fc R09: 0000000000001ce0 [ 27.998887] R10: 0000000000000001 R11: ffff8880b31f8380 R12: ffffea000268e640 [ 28.006135] R13: ffff88808df8c9c8 R14: ffff88808df8c9c8 R15: ffffea000268e660 [ 28.013410] __set_page_dirty+0x77/0x2a0 [ 28.017454] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.022887] mark_buffer_dirty+0x307/0x480 [ 28.027103] nilfs_btree_propagate+0x3a3/0xc20 [ 28.031670] nilfs_bmap_propagate+0x73/0x160 [ 28.036062] nilfs_collect_dat_data+0x41/0xb0 [ 28.040537] nilfs_segctor_apply_buffers+0x191/0x450 [ 28.045621] ? nilfs_collect_file_bmap+0x70/0x70 [ 28.050357] nilfs_segctor_scan_file+0x366/0x630 [ 28.055962] ? nilfs_collect_file_data+0xb0/0xb0 [ 28.060722] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.066156] nilfs_segctor_do_construct+0x1420/0x78d0 [ 28.071336] ? nilfs_segctor_scan_file+0x630/0x630 [ 28.076264] ? lock_acquire+0x170/0x3f0 [ 28.080239] ? lock_downgrade+0x740/0x740 [ 28.084374] ? do_raw_spin_unlock+0x164/0x220 [ 28.088871] ? _raw_spin_unlock+0x29/0x40 [ 28.093006] nilfs_segctor_construct+0x6db/0x8e0 [ 28.097751] nilfs_detach_log_writer+0x398/0x980 [ 28.102493] ? nilfs_clean_segments+0x990/0x990 [ 28.107172] ? dispose_list+0x11c/0x1e0 [ 28.111157] ? wait_woken+0x230/0x230 [ 28.114941] ? dispose_list+0x1e0/0x1e0 [ 28.118898] nilfs_put_super+0x3f/0x190 [ 28.122851] ? nilfs_freeze+0xb0/0xb0 [ 28.126633] generic_shutdown_super+0x144/0x370 [ 28.131283] kill_block_super+0x95/0xe0 [ 28.135259] deactivate_locked_super+0x6c/0xd0 [ 28.139822] deactivate_super+0x7f/0xa0 [ 28.143773] cleanup_mnt+0x186/0x2c0 [ 28.147467] task_work_run+0x11f/0x190 [ 28.151339] do_exit+0xa44/0x2850 [ 28.154776] ? __do_page_fault+0x571/0xad0 [ 28.158989] ? mm_update_next_owner+0x5b0/0x5b0 [ 28.163636] ? lock_downgrade+0x740/0x740 [ 28.167769] do_group_exit+0x100/0x2e0 [ 28.171637] SyS_exit_group+0x19/0x20 [ 28.175418] ? do_group_exit+0x2e0/0x2e0 [ 28.179459] do_syscall_64+0x1d5/0x640 [ 28.183414] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.188582] RIP: 0033:0x7f0a39d20b99 [ 28.192272] RSP: 002b:00007ffefd064ae8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 28.199959] RAX: ffffffffffffffda RBX: 00007f0a39d98330 RCX: 00007f0a39d20b99 [ 28.207206] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 28.214459] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f0a39d92e40 [ 28.221705] R10: 00007ffefd064a00 R11: 0000000000000246 R12: 00007f0a39d98330 [ 28.228953] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 28.236645] Kernel Offset: disabled [ 28.240326] Rebooting in 86400 seconds..