[ 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 '10.128.1.21' (ECDSA) to the list of known hosts. syzkaller login: [ 28.077758] IPVS: ftp: loaded support on port[0] = 21 executing program [ 28.165081] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 28.174538] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 28.185871] NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=16) [ 28.196209] Remounting filesystem read-only [ 28.201631] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 28.211970] NILFS error (device loop0): nilfs_bmap_last_key: broken bmap (inode number=16) [ 28.220801] NILFS (loop0): error -5 truncating bmap (ino=16) [ 28.231573] ------------[ cut here ]------------ [ 28.236444] WARNING: CPU: 0 PID: 7956 at include/linux/backing-dev.h:335 account_page_dirtied+0x8df/0xbb0 [ 28.246133] Kernel panic - not syncing: panic_on_warn set ... [ 28.246133] [ 28.253477] CPU: 0 PID: 7956 Comm: syz-executor428 Not tainted 4.14.295-syzkaller #0 [ 28.261331] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 28.270658] Call Trace: [ 28.273227] dump_stack+0x1b2/0x281 [ 28.276836] panic+0x1f9/0x42d [ 28.280006] ? add_taint.cold+0x16/0x16 [ 28.283961] ? account_page_dirtied+0x8df/0xbb0 [ 28.288609] ? account_page_dirtied+0x8df/0xbb0 [ 28.293253] __warn.cold+0x20/0x44 [ 28.296772] ? ist_end_non_atomic+0x10/0x10 [ 28.301071] ? account_page_dirtied+0x8df/0xbb0 [ 28.305719] report_bug+0x208/0x250 [ 28.309328] do_error_trap+0x195/0x2d0 [ 28.313213] ? math_error+0x2d0/0x2d0 [ 28.316990] ? deactivate_locked_super+0x6c/0xd0 [ 28.321726] ? deactivate_super+0x7f/0xa0 [ 28.325850] ? cleanup_mnt+0x186/0x2c0 [ 28.329717] ? trace_hardirqs_on+0x10/0x10 [ 28.333927] ? trace_hardirqs_on+0x10/0x10 [ 28.338138] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.342958] invalid_op+0x1b/0x40 [ 28.346419] RIP: 0010:account_page_dirtied+0x8df/0xbb0 [ 28.351670] RSP: 0018:ffff8880b368f640 EFLAGS: 00010097 [ 28.357010] RAX: ffff888097d7a300 RBX: ffff8880aec002c0 RCX: 1ffffffff127a5d4 [ 28.364285] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000086 [ 28.371531] RBP: ffff88808e39ab58 R08: ffffffff8ba5d9fc R09: 0000000000001cc0 [ 28.378778] R10: 0000000000000001 R11: ffff888097d7a300 R12: ffffea0002cce600 [ 28.386023] R13: ffff88808e39a9c8 R14: ffff88808e39a9c8 R15: ffffea0002cce620 [ 28.393285] __set_page_dirty+0x77/0x2a0 [ 28.397325] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.402754] mark_buffer_dirty+0x307/0x480 [ 28.406966] nilfs_btree_propagate+0x3a3/0xc20 [ 28.411530] nilfs_bmap_propagate+0x73/0x160 [ 28.415918] nilfs_collect_dat_data+0x41/0xb0 [ 28.420391] nilfs_segctor_apply_buffers+0x191/0x450 [ 28.425472] ? nilfs_collect_file_bmap+0x70/0x70 [ 28.430208] nilfs_segctor_scan_file+0x366/0x630 [ 28.434941] ? nilfs_collect_file_data+0xb0/0xb0 [ 28.439676] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.445118] nilfs_segctor_do_construct+0x1420/0x78d0 [ 28.450293] ? nilfs_segctor_scan_file+0x630/0x630 [ 28.455199] ? lock_acquire+0x170/0x3f0 [ 28.459150] ? lock_downgrade+0x740/0x740 [ 28.463275] ? do_raw_spin_unlock+0x164/0x220 [ 28.467769] ? _raw_spin_unlock+0x29/0x40 [ 28.471994] nilfs_segctor_construct+0x6db/0x8e0 [ 28.476742] nilfs_detach_log_writer+0x398/0x980 [ 28.481483] ? nilfs_clean_segments+0x990/0x990 [ 28.486151] ? dispose_list+0x11c/0x1e0 [ 28.490113] ? wait_woken+0x230/0x230 [ 28.493899] ? dispose_list+0x1e0/0x1e0 [ 28.497863] nilfs_put_super+0x3f/0x190 [ 28.501821] ? nilfs_freeze+0xb0/0xb0 [ 28.505604] generic_shutdown_super+0x144/0x370 [ 28.510252] kill_block_super+0x95/0xe0 [ 28.514207] deactivate_locked_super+0x6c/0xd0 [ 28.518771] deactivate_super+0x7f/0xa0 [ 28.522725] cleanup_mnt+0x186/0x2c0 [ 28.526422] task_work_run+0x11f/0x190 [ 28.530292] do_exit+0xa44/0x2850 [ 28.533726] ? __do_page_fault+0x571/0xad0 [ 28.537939] ? mm_update_next_owner+0x5b0/0x5b0 [ 28.542587] ? lock_downgrade+0x740/0x740 [ 28.546720] do_group_exit+0x100/0x2e0 [ 28.550591] SyS_exit_group+0x19/0x20 [ 28.554369] ? do_group_exit+0x2e0/0x2e0 [ 28.558404] do_syscall_64+0x1d5/0x640 [ 28.562273] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.567439] RIP: 0033:0x7f5daba1db89 [ 28.571125] RSP: 002b:00007ffcb94842b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 28.578809] RAX: ffffffffffffffda RBX: 00007f5daba95330 RCX: 00007f5daba1db89 [ 28.586056] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 28.593314] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f5daba8fe40 [ 28.600567] R10: 00007ffcb94841d0 R11: 0000000000000246 R12: 00007f5daba95330 [ 28.607921] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 28.615535] Kernel Offset: disabled [ 28.619203] Rebooting in 86400 seconds..