[ 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 '10.128.10.40' (ECDSA) to the list of known hosts. syzkaller login: [ 28.628519] IPVS: ftp: loaded support on port[0] = 21 executing program [ 28.685704] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 28.693373] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 28.705371] NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=16) [ 28.715353] Remounting filesystem read-only [ 28.720506] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 28.730256] NILFS error (device loop0): nilfs_bmap_last_key: broken bmap (inode number=16) [ 28.738767] NILFS (loop0): error -5 truncating bmap (ino=16) [ 28.759536] ------------[ cut here ]------------ [ 28.764406] WARNING: CPU: 1 PID: 7982 at include/linux/backing-dev.h:335 account_page_dirtied+0x8df/0xbb0 [ 28.774092] Kernel panic - not syncing: panic_on_warn set ... [ 28.774092] [ 28.781438] CPU: 1 PID: 7982 Comm: syz-executor409 Not tainted 4.14.295-syzkaller #0 [ 28.789300] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 28.798637] Call Trace: [ 28.801208] dump_stack+0x1b2/0x281 [ 28.804818] panic+0x1f9/0x42d [ 28.807993] ? add_taint.cold+0x16/0x16 [ 28.811956] ? account_page_dirtied+0x8df/0xbb0 [ 28.816606] ? account_page_dirtied+0x8df/0xbb0 [ 28.821258] __warn.cold+0x20/0x44 [ 28.824782] ? ist_end_non_atomic+0x10/0x10 [ 28.829111] ? account_page_dirtied+0x8df/0xbb0 [ 28.833761] report_bug+0x208/0x250 [ 28.837371] do_error_trap+0x195/0x2d0 [ 28.841241] ? math_error+0x2d0/0x2d0 [ 28.845022] ? deactivate_locked_super+0x6c/0xd0 [ 28.849759] ? deactivate_super+0x7f/0xa0 [ 28.853888] ? cleanup_mnt+0x186/0x2c0 [ 28.857757] ? trace_hardirqs_on+0x10/0x10 [ 28.861973] ? trace_hardirqs_on+0x10/0x10 [ 28.866190] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.871014] invalid_op+0x1b/0x40 [ 28.874451] RIP: 0010:account_page_dirtied+0x8df/0xbb0 [ 28.879704] RSP: 0018:ffff8880b33bf640 EFLAGS: 00010097 [ 28.885048] RAX: ffff888095aee2c0 RBX: ffff8880af3d0a80 RCX: 1ffffffff127a5d4 [ 28.892301] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000086 [ 28.899554] RBP: ffff88808dfaeb58 R08: ffffffff8ba5d8ac R09: 0000000000001cda [ 28.906809] R10: 0000000000000001 R11: ffff888095aee2c0 R12: ffffea0002728540 [ 28.914064] R13: ffff88808dfae9c8 R14: ffff88808dfae9c8 R15: ffffea0002728560 [ 28.921330] __set_page_dirty+0x77/0x2a0 [ 28.925374] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.930806] mark_buffer_dirty+0x307/0x480 [ 28.935024] nilfs_btree_propagate+0x3a3/0xc20 [ 28.939590] nilfs_bmap_propagate+0x73/0x160 [ 28.943981] nilfs_collect_dat_data+0x41/0xb0 [ 28.948458] nilfs_segctor_apply_buffers+0x191/0x450 [ 28.953542] ? nilfs_collect_file_bmap+0x70/0x70 [ 28.958281] nilfs_segctor_scan_file+0x366/0x630 [ 28.963020] ? nilfs_collect_file_data+0xb0/0xb0 [ 28.967760] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.973192] nilfs_segctor_do_construct+0x1420/0x78d0 [ 28.978376] ? nilfs_segctor_scan_file+0x630/0x630 [ 28.983287] ? lock_acquire+0x170/0x3f0 [ 28.987251] ? lock_downgrade+0x740/0x740 [ 28.991380] ? do_raw_spin_unlock+0x164/0x220 [ 28.995860] ? _raw_spin_unlock+0x29/0x40 [ 28.999989] nilfs_segctor_construct+0x6db/0x8e0 [ 29.004744] nilfs_detach_log_writer+0x398/0x980 [ 29.009485] ? nilfs_clean_segments+0x990/0x990 [ 29.014137] ? dispose_list+0x11c/0x1e0 [ 29.018096] ? wait_woken+0x230/0x230 [ 29.021881] ? dispose_list+0x1e0/0x1e0 [ 29.025838] nilfs_put_super+0x3f/0x190 [ 29.029792] ? nilfs_freeze+0xb0/0xb0 [ 29.033574] generic_shutdown_super+0x144/0x370 [ 29.038226] kill_block_super+0x95/0xe0 [ 29.042183] deactivate_locked_super+0x6c/0xd0 [ 29.046751] deactivate_super+0x7f/0xa0 [ 29.050708] cleanup_mnt+0x186/0x2c0 [ 29.054408] task_work_run+0x11f/0x190 [ 29.058285] do_exit+0xa44/0x2850 [ 29.061729] ? __do_page_fault+0x571/0xad0 [ 29.065949] ? mm_update_next_owner+0x5b0/0x5b0 [ 29.070621] ? lock_downgrade+0x740/0x740 [ 29.074765] do_group_exit+0x100/0x2e0 [ 29.078648] SyS_exit_group+0x19/0x20 [ 29.082438] ? do_group_exit+0x2e0/0x2e0 [ 29.086488] do_syscall_64+0x1d5/0x640 [ 29.090375] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.095549] RIP: 0033:0x7fadd53f3b89 [ 29.099245] RSP: 002b:00007fff69247668 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 29.106939] RAX: ffffffffffffffda RBX: 00007fadd546b330 RCX: 00007fadd53f3b89 [ 29.114194] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 29.121452] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007fadd5465e40 [ 29.128712] R10: 00007fff69247580 R11: 0000000000000246 R12: 00007fadd546b330 [ 29.135980] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 29.143589] Kernel Offset: disabled [ 29.147276] Rebooting in 86400 seconds..