[ 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 '10.128.1.68' (ECDSA) to the list of known hosts. syzkaller login: [ 31.384226] IPVS: ftp: loaded support on port[0] = 21 executing program [ 31.452130] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 31.461661] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 31.465213] NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=16) [ 31.481941] Remounting filesystem read-only [ 31.486815] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 31.496346] NILFS error (device loop0): nilfs_bmap_last_key: broken bmap (inode number=16) [ 31.504793] NILFS (loop0): error -5 truncating bmap (ino=16) [ 31.515408] ------------[ cut here ]------------ [ 31.520275] WARNING: CPU: 1 PID: 7959 at include/linux/backing-dev.h:335 account_page_dirtied+0x8df/0xbb0 [ 31.529965] Kernel panic - not syncing: panic_on_warn set ... [ 31.529965] [ 31.537309] CPU: 1 PID: 7959 Comm: syz-executor291 Not tainted 4.14.295-syzkaller #0 [ 31.545172] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 31.554511] Call Trace: [ 31.557087] dump_stack+0x1b2/0x281 [ 31.560710] panic+0x1f9/0x42d [ 31.563887] ? add_taint.cold+0x16/0x16 [ 31.567852] ? account_page_dirtied+0x8df/0xbb0 [ 31.572510] ? account_page_dirtied+0x8df/0xbb0 [ 31.577163] __warn.cold+0x20/0x44 [ 31.580684] ? ist_end_non_atomic+0x10/0x10 [ 31.584982] ? account_page_dirtied+0x8df/0xbb0 [ 31.589629] report_bug+0x208/0x250 [ 31.593235] do_error_trap+0x195/0x2d0 [ 31.597104] ? math_error+0x2d0/0x2d0 [ 31.600885] ? deactivate_locked_super+0x6c/0xd0 [ 31.605620] ? deactivate_super+0x7f/0xa0 [ 31.609743] ? cleanup_mnt+0x186/0x2c0 [ 31.613614] ? trace_hardirqs_on+0x10/0x10 [ 31.617825] ? trace_hardirqs_on+0x10/0x10 [ 31.622041] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.626864] invalid_op+0x1b/0x40 [ 31.630320] RIP: 0010:account_page_dirtied+0x8df/0xbb0 [ 31.635576] RSP: 0018:ffff8880b3eff640 EFLAGS: 00010097 [ 31.640917] RAX: ffff888098ad6600 RBX: ffff8880aec8cc00 RCX: 1ffffffff127a5d4 [ 31.648171] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000086 [ 31.655446] RBP: ffff88808dfe2b58 R08: ffffffff8ba5ddec R09: 0000000000001d26 [ 31.662691] R10: 0000000000000001 R11: ffff888098ad6600 R12: ffffea0002611d00 [ 31.669938] R13: ffff88808dfe29c8 R14: ffff88808dfe29c8 R15: ffffea0002611d20 [ 31.677207] __set_page_dirty+0x77/0x2a0 [ 31.681249] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 31.686698] mark_buffer_dirty+0x307/0x480 [ 31.690924] nilfs_btree_propagate+0x3a3/0xc20 [ 31.695488] nilfs_bmap_propagate+0x73/0x160 [ 31.699875] nilfs_collect_dat_data+0x41/0xb0 [ 31.704346] nilfs_segctor_apply_buffers+0x191/0x450 [ 31.709427] ? nilfs_collect_file_bmap+0x70/0x70 [ 31.714162] nilfs_segctor_scan_file+0x366/0x630 [ 31.718895] ? nilfs_collect_file_data+0xb0/0xb0 [ 31.723632] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 31.729059] nilfs_segctor_do_construct+0x1420/0x78d0 [ 31.734235] ? nilfs_segctor_scan_file+0x630/0x630 [ 31.739143] ? lock_acquire+0x170/0x3f0 [ 31.743094] ? lock_downgrade+0x740/0x740 [ 31.747224] ? do_raw_spin_unlock+0x164/0x220 [ 31.751697] ? _raw_spin_unlock+0x29/0x40 [ 31.755821] nilfs_segctor_construct+0x6db/0x8e0 [ 31.760558] nilfs_detach_log_writer+0x398/0x980 [ 31.765296] ? nilfs_clean_segments+0x990/0x990 [ 31.769945] ? dispose_list+0x11c/0x1e0 [ 31.773899] ? wait_woken+0x230/0x230 [ 31.777682] ? dispose_list+0x1e0/0x1e0 [ 31.781636] nilfs_put_super+0x3f/0x190 [ 31.785586] ? nilfs_freeze+0xb0/0xb0 [ 31.789367] generic_shutdown_super+0x144/0x370 [ 31.794014] kill_block_super+0x95/0xe0 [ 31.797972] deactivate_locked_super+0x6c/0xd0 [ 31.802541] deactivate_super+0x7f/0xa0 [ 31.806494] cleanup_mnt+0x186/0x2c0 [ 31.810187] task_work_run+0x11f/0x190 [ 31.814056] do_exit+0xa44/0x2850 [ 31.817489] ? __do_page_fault+0x571/0xad0 [ 31.821703] ? mm_update_next_owner+0x5b0/0x5b0 [ 31.826352] ? lock_downgrade+0x740/0x740 [ 31.830483] do_group_exit+0x100/0x2e0 [ 31.834350] SyS_exit_group+0x19/0x20 [ 31.838131] ? do_group_exit+0x2e0/0x2e0 [ 31.842518] do_syscall_64+0x1d5/0x640 [ 31.846385] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 31.851563] RIP: 0033:0x7f3c56842b89 [ 31.855251] RSP: 002b:00007ffc3b30f8a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 31.862935] RAX: ffffffffffffffda RBX: 00007f3c568ba330 RCX: 00007f3c56842b89 [ 31.870183] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 31.877432] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f3c568b4e40 [ 31.884692] R10: 00007ffc3b30f7c0 R11: 0000000000000246 R12: 00007f3c568ba330 [ 31.891949] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 31.899552] Kernel Offset: disabled [ 31.903233] Rebooting in 86400 seconds..