[ 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 '10.128.0.71' (ECDSA) to the list of known hosts. syzkaller login: [ 28.806685] IPVS: ftp: loaded support on port[0] = 21 executing program [ 28.874342] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 28.887626] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 28.897696] NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=16) [ 28.908665] Remounting filesystem read-only [ 28.913348] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 28.923460] NILFS error (device loop0): nilfs_bmap_last_key: broken bmap (inode number=16) [ 28.932659] NILFS (loop0): error -5 truncating bmap (ino=16) [ 28.943798] ------------[ cut here ]------------ [ 28.948673] WARNING: CPU: 0 PID: 7985 at include/linux/backing-dev.h:335 account_page_dirtied+0x8df/0xbb0 [ 28.958364] Kernel panic - not syncing: panic_on_warn set ... [ 28.958364] [ 28.965713] CPU: 0 PID: 7985 Comm: syz-executor202 Not tainted 4.14.295-syzkaller #0 [ 28.973579] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 28.982913] Call Trace: [ 28.985484] dump_stack+0x1b2/0x281 [ 28.989100] panic+0x1f9/0x42d [ 28.992299] ? add_taint.cold+0x16/0x16 [ 28.996262] ? account_page_dirtied+0x8df/0xbb0 [ 29.000920] ? account_page_dirtied+0x8df/0xbb0 [ 29.005574] __warn.cold+0x20/0x44 [ 29.009102] ? ist_end_non_atomic+0x10/0x10 [ 29.013406] ? account_page_dirtied+0x8df/0xbb0 [ 29.018056] report_bug+0x208/0x250 [ 29.021664] do_error_trap+0x195/0x2d0 [ 29.025535] ? math_error+0x2d0/0x2d0 [ 29.029318] ? deactivate_locked_super+0x6c/0xd0 [ 29.034057] ? deactivate_super+0x7f/0xa0 [ 29.038193] ? cleanup_mnt+0x186/0x2c0 [ 29.042060] ? trace_hardirqs_on+0x10/0x10 [ 29.046273] ? trace_hardirqs_on+0x10/0x10 [ 29.050486] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.055313] invalid_op+0x1b/0x40 [ 29.058757] RIP: 0010:account_page_dirtied+0x8df/0xbb0 [ 29.064017] RSP: 0018:ffff8880b3887640 EFLAGS: 00010097 [ 29.069370] RAX: ffff88809827a340 RBX: ffff8880af3da340 RCX: 1ffffffff127a5d4 [ 29.076623] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000086 [ 29.083875] RBP: ffff88808df5fb58 R08: ffffffff8ba5df3c R09: 0000000000001d02 [ 29.091125] R10: 0000000000000001 R11: ffff88809827a340 R12: ffffea0002942f00 [ 29.098373] R13: ffff88808df5f9c8 R14: ffff88808df5f9c8 R15: ffffea0002942f20 [ 29.105652] __set_page_dirty+0x77/0x2a0 [ 29.109695] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 29.115123] mark_buffer_dirty+0x307/0x480 [ 29.119342] nilfs_btree_propagate+0x3a3/0xc20 [ 29.123904] nilfs_bmap_propagate+0x73/0x160 [ 29.128294] nilfs_collect_dat_data+0x41/0xb0 [ 29.132768] nilfs_segctor_apply_buffers+0x191/0x450 [ 29.137849] ? nilfs_collect_file_bmap+0x70/0x70 [ 29.142590] nilfs_segctor_scan_file+0x366/0x630 [ 29.147330] ? nilfs_collect_file_data+0xb0/0xb0 [ 29.152071] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 29.157501] nilfs_segctor_do_construct+0x1420/0x78d0 [ 29.162681] ? nilfs_segctor_scan_file+0x630/0x630 [ 29.167592] ? lock_acquire+0x170/0x3f0 [ 29.171572] ? lock_downgrade+0x740/0x740 [ 29.175717] ? do_raw_spin_unlock+0x164/0x220 [ 29.180229] ? _raw_spin_unlock+0x29/0x40 [ 29.184372] nilfs_segctor_construct+0x6db/0x8e0 [ 29.189117] nilfs_detach_log_writer+0x398/0x980 [ 29.193858] ? nilfs_clean_segments+0x990/0x990 [ 29.198511] ? dispose_list+0x11c/0x1e0 [ 29.202470] ? evict_inodes+0x2cd/0x3a0 [ 29.206426] ? dispose_list+0x1e0/0x1e0 [ 29.210387] nilfs_put_super+0x3f/0x190 [ 29.214345] ? nilfs_freeze+0xb0/0xb0 [ 29.218127] generic_shutdown_super+0x144/0x370 [ 29.222780] kill_block_super+0x95/0xe0 [ 29.226741] deactivate_locked_super+0x6c/0xd0 [ 29.231307] deactivate_super+0x7f/0xa0 [ 29.235260] cleanup_mnt+0x186/0x2c0 [ 29.238960] task_work_run+0x11f/0x190 [ 29.242833] do_exit+0xa44/0x2850 [ 29.246272] ? __do_page_fault+0x571/0xad0 [ 29.250492] ? mm_update_next_owner+0x5b0/0x5b0 [ 29.255142] ? lock_downgrade+0x740/0x740 [ 29.259274] do_group_exit+0x100/0x2e0 [ 29.263141] SyS_exit_group+0x19/0x20 [ 29.266917] ? do_group_exit+0x2e0/0x2e0 [ 29.270959] do_syscall_64+0x1d5/0x640 [ 29.274829] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.279997] RIP: 0033:0x7fa57ab0ab89 [ 29.283683] RSP: 002b:00007ffffab0f218 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 29.291367] RAX: ffffffffffffffda RBX: 00007fa57ab82330 RCX: 00007fa57ab0ab89 [ 29.298617] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 29.305864] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007fa57ab7ce40 [ 29.313111] R10: 00007ffffab0f130 R11: 0000000000000246 R12: 00007fa57ab82330 [ 29.320365] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 29.328055] Kernel Offset: disabled [ 29.331731] Rebooting in 86400 seconds..