[ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ 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 '10.128.1.20' (ECDSA) to the list of known hosts. syzkaller login: [ 27.937330] IPVS: ftp: loaded support on port[0] = 21 executing program [ 28.001838] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 28.016312] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 28.026046] NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=16) [ 28.036172] Remounting filesystem read-only [ 28.041059] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 28.050890] NILFS error (device loop0): nilfs_bmap_last_key: broken bmap (inode number=16) [ 28.059501] NILFS (loop0): error -5 truncating bmap (ino=16) [ 28.078037] ------------[ cut here ]------------ [ 28.082921] WARNING: CPU: 1 PID: 7958 at include/linux/backing-dev.h:335 account_page_dirtied+0x8df/0xbb0 [ 28.092600] Kernel panic - not syncing: panic_on_warn set ... [ 28.092600] [ 28.099939] CPU: 1 PID: 7958 Comm: syz-executor224 Not tainted 4.14.295-syzkaller #0 [ 28.107792] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 28.117121] Call Trace: [ 28.119689] dump_stack+0x1b2/0x281 [ 28.123299] panic+0x1f9/0x42d [ 28.126470] ? add_taint.cold+0x16/0x16 [ 28.130425] ? account_page_dirtied+0x8df/0xbb0 [ 28.135071] ? account_page_dirtied+0x8df/0xbb0 [ 28.139722] __warn.cold+0x20/0x44 [ 28.143240] ? ist_end_non_atomic+0x10/0x10 [ 28.147539] ? account_page_dirtied+0x8df/0xbb0 [ 28.152186] report_bug+0x208/0x250 [ 28.155814] do_error_trap+0x195/0x2d0 [ 28.159678] ? math_error+0x2d0/0x2d0 [ 28.163457] ? deactivate_locked_super+0x6c/0xd0 [ 28.168276] ? deactivate_super+0x7f/0xa0 [ 28.172412] ? cleanup_mnt+0x186/0x2c0 [ 28.176279] ? trace_hardirqs_on+0x10/0x10 [ 28.180489] ? trace_hardirqs_on+0x10/0x10 [ 28.184700] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.189528] invalid_op+0x1b/0x40 [ 28.192959] RIP: 0010:account_page_dirtied+0x8df/0xbb0 [ 28.198207] RSP: 0018:ffff8880b3abf640 EFLAGS: 00010097 [ 28.203548] RAX: ffff8880abaf4480 RBX: ffff8880aec1aa80 RCX: 1ffffffff127a5d4 [ 28.210792] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000086 [ 28.218036] RBP: ffff88808df94b58 R08: ffffffff8ba5df3c R09: 0000000000001cc0 [ 28.225543] R10: 0000000000000001 R11: ffff8880abaf4480 R12: ffffea000274d100 [ 28.232788] R13: ffff88808df949c8 R14: ffff88808df949c8 R15: ffffea000274d120 [ 28.240047] __set_page_dirty+0x77/0x2a0 [ 28.244093] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.249519] mark_buffer_dirty+0x307/0x480 [ 28.253729] nilfs_btree_propagate+0x3a3/0xc20 [ 28.258290] nilfs_bmap_propagate+0x73/0x160 [ 28.262678] nilfs_collect_dat_data+0x41/0xb0 [ 28.267151] nilfs_segctor_apply_buffers+0x191/0x450 [ 28.272231] ? nilfs_collect_file_bmap+0x70/0x70 [ 28.276966] nilfs_segctor_scan_file+0x366/0x630 [ 28.281697] ? nilfs_collect_file_data+0xb0/0xb0 [ 28.286433] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.291864] nilfs_segctor_do_construct+0x1420/0x78d0 [ 28.297040] ? nilfs_segctor_scan_file+0x630/0x630 [ 28.301951] ? lock_acquire+0x170/0x3f0 [ 28.305905] ? lock_downgrade+0x740/0x740 [ 28.310030] ? do_raw_spin_unlock+0x164/0x220 [ 28.314504] ? _raw_spin_unlock+0x29/0x40 [ 28.318628] nilfs_segctor_construct+0x6db/0x8e0 [ 28.323362] nilfs_detach_log_writer+0x398/0x980 [ 28.328097] ? nilfs_clean_segments+0x990/0x990 [ 28.332743] ? dispose_list+0x11c/0x1e0 [ 28.336702] ? wait_woken+0x230/0x230 [ 28.340480] ? dispose_list+0x1e0/0x1e0 [ 28.344431] nilfs_put_super+0x3f/0x190 [ 28.348389] ? nilfs_freeze+0xb0/0xb0 [ 28.352170] generic_shutdown_super+0x144/0x370 [ 28.356817] kill_block_super+0x95/0xe0 [ 28.360770] deactivate_locked_super+0x6c/0xd0 [ 28.365328] deactivate_super+0x7f/0xa0 [ 28.369283] cleanup_mnt+0x186/0x2c0 [ 28.373000] task_work_run+0x11f/0x190 [ 28.377127] do_exit+0xa44/0x2850 [ 28.380570] ? __do_page_fault+0x571/0xad0 [ 28.384782] ? mm_update_next_owner+0x5b0/0x5b0 [ 28.389430] ? lock_downgrade+0x740/0x740 [ 28.393559] do_group_exit+0x100/0x2e0 [ 28.397423] SyS_exit_group+0x19/0x20 [ 28.401200] ? do_group_exit+0x2e0/0x2e0 [ 28.405236] do_syscall_64+0x1d5/0x640 [ 28.409104] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.414273] RIP: 0033:0x7ffb7e7d6b89 [ 28.417960] RSP: 002b:00007ffcc09d11e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 28.425646] RAX: ffffffffffffffda RBX: 00007ffb7e84e330 RCX: 00007ffb7e7d6b89 [ 28.432891] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 28.440140] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007ffb7e848e40 [ 28.447384] R10: 00007ffcc09d1100 R11: 0000000000000246 R12: 00007ffb7e84e330 [ 28.454649] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 28.462260] Kernel Offset: disabled [ 28.465933] Rebooting in 86400 seconds..