[ 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 '10.128.0.191' (ECDSA) to the list of known hosts. syzkaller login: [ 176.922629] F2FS-fs (loop0): Invalid blocksize (65536), supports only 4KB [ 176.922629] [ 176.931223] F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock [ 176.943529] F2FS-fs (loop0): Found nat_bits in checkpoint [ 176.983116] F2FS-fs (loop0): Mounted with checkpoint version = 3e17dab1 [ 237.462687] F2FS-fs (loop0): access invalid blkaddr:4294901760 [ 237.468951] ------------[ cut here ]------------ [ 237.473710] WARNING: CPU: 0 PID: 5 at fs/f2fs/checkpoint.c:150 f2fs_is_valid_blkaddr+0x2d9/0x920 [ 237.482620] Kernel panic - not syncing: panic_on_warn set ... [ 237.482620] [ 237.489961] CPU: 0 PID: 5 Comm: kworker/u4:0 Not tainted 4.14.297-syzkaller #0 [ 237.497298] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 237.506639] Workqueue: writeback wb_workfn (flush-7:0) [ 237.511904] Call Trace: [ 237.514470] dump_stack+0x1b2/0x281 [ 237.518077] panic+0x1f9/0x42d [ 237.521247] ? add_taint.cold+0x16/0x16 [ 237.525200] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 237.529934] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 237.534682] __warn.cold+0x20/0x44 [ 237.538214] ? ist_end_non_atomic+0x10/0x10 [ 237.542526] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 237.547299] report_bug+0x208/0x250 [ 237.550908] do_error_trap+0x195/0x2d0 [ 237.554774] ? math_error+0x2d0/0x2d0 [ 237.558556] ? log_store.cold+0x16/0x16 [ 237.562511] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 237.567594] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 237.572418] invalid_op+0x1b/0x40 [ 237.575854] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 237.580586] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 237.585320] ? do_write_data_page+0x963/0x2ca0 [ 237.589880] ? f2fs_fiemap+0x700/0x700 [ 237.593749] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 237.599178] ? __write_data_page+0x115a/0x1480 [ 237.604087] ? do_write_data_page+0x2ca0/0x2ca0 [ 237.608734] ? lock_downgrade+0x740/0x740 [ 237.612872] ? f2fs_write_cache_pages+0x40d/0xe50 [ 237.617707] ? unwind_next_frame+0x404/0x17d0 [ 237.622178] ? __write_data_page+0x1480/0x1480 [ 237.626737] ? __bfs.part.0+0x174/0x470 [ 237.630692] ? __lock_acquire+0x2190/0x3f20 [ 237.634994] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 237.640424] ? __f2fs_write_data_pages+0x2e2/0xb90 [ 237.645331] ? f2fs_write_data_page+0x30/0x30 [ 237.649810] ? __f2fs_write_data_pages+0xb90/0xb90 [ 237.654716] ? do_writepages+0xc3/0x240 [ 237.658668] ? page_writeback_cpu_online+0x10/0x10 [ 237.663573] ? lock_acquire+0x170/0x3f0 [ 237.667523] ? do_raw_spin_unlock+0x164/0x220 [ 237.671995] ? _raw_spin_unlock+0x29/0x40 [ 237.676120] ? wbc_attach_and_unlock_inode+0x5e8/0x8d0 [ 237.681383] ? __filemap_fdatawrite_range+0x236/0x310 [ 237.686547] ? igrab+0x58/0x90 [ 237.689716] ? replace_page_cache_page+0x700/0x700 [ 237.694640] ? do_raw_spin_unlock+0x164/0x220 [ 237.699115] ? sync_dirty_inodes+0x1d8/0xd40 [ 237.703502] ? block_operations+0x10f/0x6d0 [ 237.707803] ? f2fs_sync_inode_meta+0x250/0x250 [ 237.712446] ? write_checkpoint+0x62/0x45f0 [ 237.716745] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 237.722178] ? f2fs_sync_fs+0x16b/0x3f0 [ 237.726151] ? sync_node_pages+0x10a0/0x10a0 [ 237.730545] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 237.735977] ? sync_node_pages+0x10a0/0x10a0 [ 237.740364] ? write_checkpoint+0x203/0x45f0 [ 237.744756] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 237.750191] ? do_raw_spin_unlock+0x164/0x220 [ 237.754668] ? _raw_spin_unlock+0x29/0x40 [ 237.758793] ? nr_blockdev_pages+0xcf/0x100 [ 237.763095] ? sync_node_pages+0x10a0/0x10a0 [ 237.767482] ? sync_node_pages+0x10a0/0x10a0 [ 237.771877] ? f2fs_sync_fs+0x178/0x3f0 [ 237.775826] ? trace_event_raw_event_f2fs__page+0x560/0x560 [ 237.781516] ? sync_node_pages+0x10a0/0x10a0 [ 237.785899] ? f2fs_balance_fs_bg+0x3a6/0x830 [ 237.790375] ? drop_inmem_page+0x850/0x850 [ 237.794588] ? __lock_acquire+0x5fc/0x3f20 [ 237.798805] ? trace_hardirqs_on+0x10/0x10 [ 237.803016] ? f2fs_write_node_pages+0x109/0x990 [ 237.807874] ? sync_node_pages+0x10a0/0x10a0 [ 237.812264] ? trace_hardirqs_on+0x10/0x10 [ 237.816478] ? sync_node_pages+0x10a0/0x10a0 [ 237.820874] ? do_writepages+0xc3/0x240 [ 237.824834] ? page_writeback_cpu_online+0x10/0x10 [ 237.829749] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 237.835198] ? __writeback_single_inode+0xda/0x1010 [ 237.840198] ? writeback_sb_inodes+0x48b/0xd30 [ 237.844779] ? wbc_detach_inode+0x780/0x780 [ 237.849089] ? down_read_trylock+0x4e/0x90 [ 237.853302] ? trylock_super+0x1b/0xe0 [ 237.857170] ? __writeback_inodes_wb+0xbf/0x230 [ 237.861820] ? wb_writeback+0x710/0xb80 [ 237.865777] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 237.871378] ? _find_next_bit+0xdb/0x100 [ 237.875419] ? get_nr_dirty_inodes+0x169/0x200 [ 237.879979] ? wb_workfn+0x708/0xf50 [ 237.883671] ? process_one_work+0x6c4/0x14a0 [ 237.888060] ? inode_wait_for_writeback+0x30/0x30 [ 237.892895] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 237.898409] ? process_one_work+0x793/0x14a0 [ 237.902815] ? work_busy+0x320/0x320 [ 237.906504] ? worker_thread+0x158/0xff0 [ 237.910544] ? _raw_spin_unlock_irq+0x24/0x80 [ 237.915017] ? worker_thread+0x5cc/0xff0 [ 237.919062] ? rescuer_thread+0xc80/0xc80 [ 237.923196] ? kthread+0x30d/0x420 [ 237.926712] ? kthread_create_on_node+0xd0/0xd0 [ 237.931366] ? ret_from_fork+0x24/0x30 [ 237.935618] Kernel Offset: disabled [ 237.939269] Rebooting in 86400 seconds..