Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.14' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   29.910105] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0)
[   29.917354] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock
[   29.929488] F2FS-fs (loop0): invalid crc value
[   29.959660] F2FS-fs (loop0): access invalid blkaddr:1
[   29.965256] ------------[ cut here ]------------
[   29.970025] WARNING: CPU: 1 PID: 7951 at fs/f2fs/checkpoint.c:150 f2fs_is_valid_blkaddr+0x2d9/0x920
[   29.979216] Kernel panic - not syncing: panic_on_warn set ...
[   29.979216] 
[   29.986630] CPU: 1 PID: 7951 Comm: syz-executor968 Not tainted 4.14.237-syzkaller #0
[   29.994507] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   30.003864] Call Trace:
[   30.006448]  dump_stack+0x1b2/0x281
[   30.010074]  panic+0x1f9/0x42d
[   30.013343]  ? add_taint.cold+0x16/0x16
[   30.017310]  ? f2fs_is_valid_blkaddr+0x2d9/0x920
[   30.022060]  ? f2fs_is_valid_blkaddr+0x2d9/0x920
[   30.026802]  __warn.cold+0x20/0x44
[   30.030331]  ? ist_end_non_atomic+0x10/0x10
[   30.034657]  ? f2fs_is_valid_blkaddr+0x2d9/0x920
[   30.039416]  report_bug+0x208/0x250
[   30.043053]  do_error_trap+0x195/0x2d0
[   30.047064]  ? math_error+0x2d0/0x2d0
[   30.050858]  ? log_store.cold+0x16/0x16
[   30.054829]  ? trace_hardirqs_on_caller+0x3a8/0x580
[   30.059854]  ? _raw_spin_unlock_irqrestore+0x66/0xe0
[   30.064950]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   30.069875]  invalid_op+0x1b/0x40
[   30.073324] RIP: 0010:f2fs_is_valid_blkaddr+0x2d9/0x920
[   30.078673] RSP: 0018:ffff8880b34c7820 EFLAGS: 00010286
[   30.084124] RAX: dffffc0000000000 RBX: ffff8880b304ec40 RCX: 0000000000000000
[   30.091400] RDX: 0000000000000000 RSI: ffffffff878bbbc0 RDI: ffffed1016698ede
[   30.098917] RBP: 0000000000000005 R08: 0000000000000029 R09: 0000000000000000
[   30.106285] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
[   30.113686] R13: 0000000000000001 R14: 0000000000001000 R15: 0000000000000200
[   30.121284]  f2fs_submit_page_bio+0x10a/0x1380
[   30.125865]  ? check_preemption_disabled+0x35/0x240
[   30.130897]  read_node_page+0x209/0x2f0
[   30.134982]  ? truncate_node+0xc80/0xc80
[   30.139101]  __get_node_page.part.0+0x97/0xea0
[   30.143712]  get_node_page+0xdd/0x170
[   30.147512]  f2fs_iget+0x1e8/0x3760
[   30.151129]  ? kmem_cache_alloc_trace+0x36c/0x3d0
[   30.155989]  f2fs_fill_super+0x30ac/0x56a0
[   30.160251]  ? snprintf+0xa5/0xd0
[   30.163725]  ? f2fs_commit_super+0x3a0/0x3a0
[   30.168145]  ? ns_test_super+0x50/0x50
[   30.172043]  ? set_blocksize+0x125/0x380
[   30.176125]  mount_bdev+0x2b3/0x360
[   30.179760]  ? f2fs_commit_super+0x3a0/0x3a0
[   30.184259]  mount_fs+0x92/0x2a0
[   30.187631]  vfs_kern_mount.part.0+0x5b/0x470
[   30.192142]  do_mount+0xe53/0x2a00
[   30.195722]  ? retint_kernel+0x2d/0x2d
[   30.199608]  ? copy_mount_string+0x40/0x40
[   30.203950]  ? memset+0x20/0x40
[   30.207256]  ? copy_mount_options+0x1fa/0x2f0
[   30.212186]  ? copy_mnt_ns+0xa30/0xa30
[   30.216173]  SyS_mount+0xa8/0x120
[   30.219645]  ? copy_mnt_ns+0xa30/0xa30
[   30.223524]  do_syscall_64+0x1d5/0x640
[   30.227412]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   30.232600] RIP: 0033:0x4453ea
[   30.235800] RSP: 002b:00007ffdb90a77c8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
[   30.243517] RAX: ffffffffffffffda RBX: 00007ffdb90a7820 RCX: 00000000004453ea
[   30.250796] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffdb90a77e0
[   30.258065] RBP: 00007ffdb90a77e0 R08: 00007ffdb90a7820 R09: 0000000000000000
[   30.265346] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000020000320
[   30.272623] R13: 0000000000000003 R14: 0000000000000004 R15: 000000000000000c
[   30.281128] Kernel Offset: disabled
[   30.284989] Rebooting in 86400 seconds..