[ 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 '10.128.0.90' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 28.751668] IPVS: ftp: loaded support on port[0] = 21 [ 28.799924] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 28.803445] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 28.819389] NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=16) [ 28.829832] Remounting filesystem read-only [ 28.835315] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 28.845468] NILFS error (device loop0): nilfs_bmap_last_key: broken bmap (inode number=16) [ 28.854612] NILFS (loop0): error -5 truncating bmap (ino=16) [ 28.871360] ------------[ cut here ]------------ [ 28.876309] WARNING: CPU: 0 PID: 7967 at include/linux/backing-dev.h:335 account_page_dirtied+0x8df/0xbb0 [ 28.886096] Kernel panic - not syncing: panic_on_warn set ... [ 28.886096] [ 28.893447] CPU: 0 PID: 7967 Comm: syz-executor423 Not tainted 4.14.295-syzkaller #0 [ 28.901307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 28.910641] Call Trace: [ 28.913222] dump_stack+0x1b2/0x281 [ 28.916834] panic+0x1f9/0x42d [ 28.920008] ? add_taint.cold+0x16/0x16 [ 28.923968] ? account_page_dirtied+0x8df/0xbb0 [ 28.928620] ? account_page_dirtied+0x8df/0xbb0 [ 28.933271] __warn.cold+0x20/0x44 [ 28.936792] ? ist_end_non_atomic+0x10/0x10 [ 28.941095] ? account_page_dirtied+0x8df/0xbb0 [ 28.945757] report_bug+0x208/0x250 [ 28.949366] do_error_trap+0x195/0x2d0 [ 28.953757] ? math_error+0x2d0/0x2d0 [ 28.957546] ? deactivate_locked_super+0x6c/0xd0 [ 28.962385] ? deactivate_super+0x7f/0xa0 [ 28.966515] ? cleanup_mnt+0x186/0x2c0 [ 28.970385] ? trace_hardirqs_on+0x10/0x10 [ 28.974608] ? trace_hardirqs_on+0x10/0x10 [ 28.978826] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.983662] invalid_op+0x1b/0x40 [ 28.987099] RIP: 0010:account_page_dirtied+0x8df/0xbb0 [ 28.992378] RSP: 0018:ffff888091ea7640 EFLAGS: 00010097 [ 28.997726] RAX: ffff88809790c640 RBX: ffff8880af3fa3c0 RCX: 1ffffffff127a5d4 [ 29.005001] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000086 [ 29.012254] RBP: ffff88808dbb4b58 R08: ffffffff8ba5db4c R09: 0000000000001d0a [ 29.019506] R10: 0000000000000001 R11: ffff88809790c640 R12: ffffea000298d700 [ 29.026757] R13: ffff88808dbb49c8 R14: ffff88808dbb49c8 R15: ffffea000298d720 [ 29.034025] __set_page_dirty+0x77/0x2a0 [ 29.038086] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 29.043524] mark_buffer_dirty+0x307/0x480 [ 29.047743] nilfs_btree_propagate+0x3a3/0xc20 [ 29.052327] nilfs_bmap_propagate+0x73/0x160 [ 29.056746] nilfs_collect_dat_data+0x41/0xb0 [ 29.061237] nilfs_segctor_apply_buffers+0x191/0x450 [ 29.066322] ? nilfs_collect_file_bmap+0x70/0x70 [ 29.071061] nilfs_segctor_scan_file+0x366/0x630 [ 29.075801] ? nilfs_collect_file_data+0xb0/0xb0 [ 29.080544] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 29.085978] nilfs_segctor_do_construct+0x1420/0x78d0 [ 29.091161] ? nilfs_segctor_scan_file+0x630/0x630 [ 29.096078] ? lock_acquire+0x170/0x3f0 [ 29.100047] ? lock_downgrade+0x740/0x740 [ 29.104184] ? do_raw_spin_unlock+0x164/0x220 [ 29.108665] ? _raw_spin_unlock+0x29/0x40 [ 29.112796] nilfs_segctor_construct+0x6db/0x8e0 [ 29.117553] nilfs_detach_log_writer+0x398/0x980 [ 29.122297] ? nilfs_clean_segments+0x990/0x990 [ 29.126951] ? dispose_list+0x11c/0x1e0 [ 29.130912] ? wait_woken+0x230/0x230 [ 29.134697] ? dispose_list+0x1e0/0x1e0 [ 29.138673] nilfs_put_super+0x3f/0x190 [ 29.142638] ? nilfs_freeze+0xb0/0xb0 [ 29.146429] generic_shutdown_super+0x144/0x370 [ 29.151083] kill_block_super+0x95/0xe0 [ 29.155041] deactivate_locked_super+0x6c/0xd0 [ 29.159606] deactivate_super+0x7f/0xa0 [ 29.163562] cleanup_mnt+0x186/0x2c0 [ 29.167263] task_work_run+0x11f/0x190 [ 29.171137] do_exit+0xa44/0x2850 [ 29.174837] ? __do_page_fault+0x571/0xad0 [ 29.179057] ? mm_update_next_owner+0x5b0/0x5b0 [ 29.183710] ? lock_downgrade+0x740/0x740 [ 29.187845] do_group_exit+0x100/0x2e0 [ 29.191714] SyS_exit_group+0x19/0x20 [ 29.195493] ? do_group_exit+0x2e0/0x2e0 [ 29.199541] do_syscall_64+0x1d5/0x640 [ 29.203414] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.208628] RIP: 0033:0x7f902c32eb89 [ 29.212327] RSP: 002b:00007fffb7762d58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 29.220016] RAX: ffffffffffffffda RBX: 00007f902c3a6330 RCX: 00007f902c32eb89 [ 29.227371] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 29.234621] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f902c3a0e40 [ 29.241873] R10: 00007fffb7762c70 R11: 0000000000000246 R12: 00007f902c3a6330 [ 29.249127] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 29.256759] Kernel Offset: disabled [ 29.260438] Rebooting in 86400 seconds..