[ 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 '10.128.0.49' (ECDSA) to the list of known hosts. syzkaller login: [ 29.855659] IPVS: ftp: loaded support on port[0] = 21 executing program [ 29.952763] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 29.975809] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 29.985887] NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=16) [ 29.996143] Remounting filesystem read-only [ 30.001184] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 30.010716] NILFS error (device loop0): nilfs_bmap_last_key: broken bmap (inode number=16) [ 30.019701] NILFS (loop0): error -5 truncating bmap (ino=16) [ 30.030497] ------------[ cut here ]------------ [ 30.035389] WARNING: CPU: 1 PID: 7976 at include/linux/backing-dev.h:335 account_page_dirtied+0x8df/0xbb0 [ 30.045084] Kernel panic - not syncing: panic_on_warn set ... [ 30.045084] [ 30.052442] CPU: 1 PID: 7976 Comm: syz-executor131 Not tainted 4.14.295-syzkaller #0 [ 30.060306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 30.069646] Call Trace: [ 30.072226] dump_stack+0x1b2/0x281 [ 30.075832] panic+0x1f9/0x42d [ 30.079002] ? add_taint.cold+0x16/0x16 [ 30.082956] ? account_page_dirtied+0x8df/0xbb0 [ 30.087601] ? account_page_dirtied+0x8df/0xbb0 [ 30.092244] __warn.cold+0x20/0x44 [ 30.095763] ? ist_end_non_atomic+0x10/0x10 [ 30.100060] ? account_page_dirtied+0x8df/0xbb0 [ 30.105143] report_bug+0x208/0x250 [ 30.108748] do_error_trap+0x195/0x2d0 [ 30.112612] ? math_error+0x2d0/0x2d0 [ 30.116390] ? deactivate_locked_super+0x6c/0xd0 [ 30.121275] ? deactivate_super+0x7f/0xa0 [ 30.125418] ? cleanup_mnt+0x186/0x2c0 [ 30.129294] ? trace_hardirqs_on+0x10/0x10 [ 30.133514] ? trace_hardirqs_on+0x10/0x10 [ 30.137737] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.142568] invalid_op+0x1b/0x40 [ 30.146004] RIP: 0010:account_page_dirtied+0x8df/0xbb0 [ 30.151254] RSP: 0018:ffff8880b3b8f640 EFLAGS: 00010097 [ 30.156595] RAX: ffff8880b376e340 RBX: ffff8880aec2eb80 RCX: 1ffffffff127a5d4 [ 30.163844] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000086 [ 30.171092] RBP: ffff88808df49b58 R08: ffffffff8ba5ddec R09: 0000000000001cf6 [ 30.178339] R10: 0000000000000001 R11: ffff8880b376e340 R12: ffffea0002d84040 [ 30.185585] R13: ffff88808df499c8 R14: ffff88808df499c8 R15: ffffea0002d84060 [ 30.192842] __set_page_dirty+0x77/0x2a0 [ 30.196883] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 30.202311] mark_buffer_dirty+0x307/0x480 [ 30.206526] nilfs_btree_propagate+0x3a3/0xc20 [ 30.211092] nilfs_bmap_propagate+0x73/0x160 [ 30.215497] nilfs_collect_dat_data+0x41/0xb0 [ 30.219975] nilfs_segctor_apply_buffers+0x191/0x450 [ 30.225068] ? nilfs_collect_file_bmap+0x70/0x70 [ 30.229804] nilfs_segctor_scan_file+0x366/0x630 [ 30.234539] ? nilfs_collect_file_data+0xb0/0xb0 [ 30.239274] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 30.244702] nilfs_segctor_do_construct+0x1420/0x78d0 [ 30.249879] ? nilfs_segctor_scan_file+0x630/0x630 [ 30.254786] ? lock_acquire+0x170/0x3f0 [ 30.258738] ? lock_downgrade+0x740/0x740 [ 30.262863] ? do_raw_spin_unlock+0x164/0x220 [ 30.267337] ? _raw_spin_unlock+0x29/0x40 [ 30.271638] nilfs_segctor_construct+0x6db/0x8e0 [ 30.276377] nilfs_detach_log_writer+0x398/0x980 [ 30.281122] ? nilfs_clean_segments+0x990/0x990 [ 30.285777] ? dispose_list+0x11c/0x1e0 [ 30.289733] ? wait_woken+0x230/0x230 [ 30.293516] ? dispose_list+0x1e0/0x1e0 [ 30.297470] nilfs_put_super+0x3f/0x190 [ 30.301424] ? nilfs_freeze+0xb0/0xb0 [ 30.305203] generic_shutdown_super+0x144/0x370 [ 30.309871] kill_block_super+0x95/0xe0 [ 30.313840] deactivate_locked_super+0x6c/0xd0 [ 30.318410] deactivate_super+0x7f/0xa0 [ 30.322371] cleanup_mnt+0x186/0x2c0 [ 30.326070] task_work_run+0x11f/0x190 [ 30.329939] do_exit+0xa44/0x2850 [ 30.333371] ? __do_page_fault+0x571/0xad0 [ 30.337586] ? mm_update_next_owner+0x5b0/0x5b0 [ 30.342234] ? lock_downgrade+0x740/0x740 [ 30.346364] do_group_exit+0x100/0x2e0 [ 30.350231] SyS_exit_group+0x19/0x20 [ 30.354007] ? do_group_exit+0x2e0/0x2e0 [ 30.358047] do_syscall_64+0x1d5/0x640 [ 30.361919] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 30.367099] RIP: 0033:0x7f4e0d4b9bc9 [ 30.370793] RSP: 002b:00007fffd268e6b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 30.378570] RAX: ffffffffffffffda RBX: 00007f4e0d531330 RCX: 00007f4e0d4b9bc9 [ 30.385823] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 30.393070] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f4e0d52be40 [ 30.400414] R10: 00007fffd268e5d0 R11: 0000000000000246 R12: 00007f4e0d531330 [ 30.407666] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 30.415191] Kernel Offset: disabled [ 30.418869] Rebooting in 86400 seconds..