[ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ 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 Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.611343] IPVS: ftp: loaded support on port[0] = 21 [ 26.656069] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 26.661146] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 26.675964] NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=16) [ 26.686458] Remounting filesystem read-only [ 26.691026] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 26.700485] NILFS error (device loop0): nilfs_bmap_last_key: broken bmap (inode number=16) [ 26.708964] NILFS (loop0): error -5 truncating bmap (ino=16) [ 26.722699] ------------[ cut here ]------------ [ 26.727593] WARNING: CPU: 0 PID: 7952 at include/linux/backing-dev.h:335 account_page_dirtied+0x8df/0xbb0 [ 26.737278] Kernel panic - not syncing: panic_on_warn set ... [ 26.737278] [ 26.744619] CPU: 0 PID: 7952 Comm: syz-executor272 Not tainted 4.14.295-syzkaller #0 [ 26.752473] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 26.761803] Call Trace: [ 26.764371] dump_stack+0x1b2/0x281 [ 26.767982] panic+0x1f9/0x42d [ 26.771153] ? add_taint.cold+0x16/0x16 [ 26.775119] ? account_page_dirtied+0x8df/0xbb0 [ 26.781159] ? account_page_dirtied+0x8df/0xbb0 [ 26.785810] __warn.cold+0x20/0x44 [ 26.789332] ? ist_end_non_atomic+0x10/0x10 [ 26.793633] ? account_page_dirtied+0x8df/0xbb0 [ 26.798284] report_bug+0x208/0x250 [ 26.801892] do_error_trap+0x195/0x2d0 [ 26.805759] ? math_error+0x2d0/0x2d0 [ 26.809539] ? deactivate_locked_super+0x6c/0xd0 [ 26.814270] ? deactivate_super+0x7f/0xa0 [ 26.818395] ? cleanup_mnt+0x186/0x2c0 [ 26.822264] ? trace_hardirqs_on+0x10/0x10 [ 26.826475] ? trace_hardirqs_on+0x10/0x10 [ 26.830689] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.835517] invalid_op+0x1b/0x40 [ 26.838948] RIP: 0010:account_page_dirtied+0x8df/0xbb0 [ 26.844201] RSP: 0018:ffff888095ddf640 EFLAGS: 00010097 [ 26.849543] RAX: ffff8880b473c180 RBX: ffff8880aec48c00 RCX: 1ffffffff127a5d4 [ 26.856797] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000086 [ 26.864044] RBP: ffff88808d370b58 R08: ffffffff8ba5ddec R09: 0000000000001d24 [ 26.871292] R10: 0000000000000001 R11: ffff8880b473c180 R12: ffffea0002a5c400 [ 26.878541] R13: ffff88808d3709c8 R14: ffff88808d3709c8 R15: ffffea0002a5c420 [ 26.885804] __set_page_dirty+0x77/0x2a0 [ 26.889843] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 26.895273] mark_buffer_dirty+0x307/0x480 [ 26.899488] nilfs_btree_propagate+0x3a3/0xc20 [ 26.904053] nilfs_bmap_propagate+0x73/0x160 [ 26.908441] nilfs_collect_dat_data+0x41/0xb0 [ 26.912913] nilfs_segctor_apply_buffers+0x191/0x450 [ 26.918165] ? nilfs_collect_file_bmap+0x70/0x70 [ 26.922902] nilfs_segctor_scan_file+0x366/0x630 [ 26.927637] ? nilfs_collect_file_data+0xb0/0xb0 [ 26.932372] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 26.937805] nilfs_segctor_do_construct+0x1420/0x78d0 [ 26.942983] ? nilfs_segctor_scan_file+0x630/0x630 [ 26.947889] ? lock_acquire+0x170/0x3f0 [ 26.951841] ? lock_downgrade+0x740/0x740 [ 26.955966] ? do_raw_spin_unlock+0x164/0x220 [ 26.960441] ? _raw_spin_unlock+0x29/0x40 [ 26.964566] nilfs_segctor_construct+0x6db/0x8e0 [ 26.969302] nilfs_detach_log_writer+0x398/0x980 [ 26.974038] ? nilfs_clean_segments+0x990/0x990 [ 26.978696] ? dispose_list+0x11c/0x1e0 [ 26.982653] ? wait_woken+0x230/0x230 [ 26.986430] ? dispose_list+0x1e0/0x1e0 [ 26.990383] nilfs_put_super+0x3f/0x190 [ 26.994333] ? nilfs_freeze+0xb0/0xb0 [ 26.998112] generic_shutdown_super+0x144/0x370 [ 27.002759] kill_block_super+0x95/0xe0 [ 27.006796] deactivate_locked_super+0x6c/0xd0 [ 27.011448] deactivate_super+0x7f/0xa0 [ 27.015749] cleanup_mnt+0x186/0x2c0 [ 27.019448] task_work_run+0x11f/0x190 [ 27.023317] do_exit+0xa44/0x2850 [ 27.026766] ? __do_page_fault+0x571/0xad0 [ 27.030990] ? mm_update_next_owner+0x5b0/0x5b0 [ 27.035637] ? lock_downgrade+0x740/0x740 [ 27.039767] do_group_exit+0x100/0x2e0 [ 27.043635] SyS_exit_group+0x19/0x20 [ 27.047436] ? do_group_exit+0x2e0/0x2e0 [ 27.051484] do_syscall_64+0x1d5/0x640 [ 27.055437] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.060605] RIP: 0033:0x7f8e79079b89 [ 27.064295] RSP: 002b:00007fffb4329978 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 27.071983] RAX: ffffffffffffffda RBX: 00007f8e790f1330 RCX: 00007f8e79079b89 [ 27.079266] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 27.086515] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f8e790ebe40 [ 27.093766] R10: 00007fffb4329890 R11: 0000000000000246 R12: 00007f8e790f1330 [ 27.101016] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 27.108615] Kernel Offset: disabled [ 27.112288] Rebooting in 86400 seconds..