Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.52' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   28.638095] rock: corrupted directory entry. extent=32, offset=2044, size=237
[   28.648731] overlayfs: fs on './file0' does not support file handles, falling back to index=off.
[   28.663629] ------------[ cut here ]------------
[   28.668553] WARNING: CPU: 1 PID: 7967 at fs/overlayfs/dir.c:521 ovl_create_or_link+0xc0e/0x1200
[   28.677718] Kernel panic - not syncing: panic_on_warn set ...
[   28.677718] 
[   28.685148] CPU: 1 PID: 7967 Comm: syz-executor287 Not tainted 4.14.301-syzkaller #0
[   28.693352] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
[   28.702964] Call Trace:
[   28.705551]  dump_stack+0x1b2/0x281
[   28.709307]  panic+0x1f9/0x42d
[   28.712533]  ? add_taint.cold+0x16/0x16
[   28.716672]  ? ovl_create_or_link+0xc0e/0x1200
[   28.721347]  ? ovl_create_or_link+0xc0e/0x1200
[   28.725945]  __warn.cold+0x20/0x44
[   28.729561]  ? ist_end_non_atomic+0x10/0x10
[   28.733864]  ? ovl_create_or_link+0xc0e/0x1200
[   28.738441]  report_bug+0x208/0x250
[   28.742347]  do_error_trap+0x195/0x2d0
[   28.746329]  ? math_error+0x2d0/0x2d0
[   28.750216]  ? debug_object_active_state+0x236/0x330
[   28.755312]  ? debug_object_free+0x320/0x320
[   28.760062]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   28.764912]  invalid_op+0x1b/0x40
[   28.768440] RIP: 0010:ovl_create_or_link+0xc0e/0x1200
[   28.773605] RSP: 0018:ffff88809b737be0 EFLAGS: 00010297
[   28.779038] RAX: ffff8880b4e52400 RBX: ffff88808d74b548 RCX: 1ffff11012e9ae13
[   28.786288] RDX: 0000000000000000 RSI: ffff8880b4e52d28 RDI: ffff8880974d7098
[   28.793653] RBP: ffff88808d74d8f0 R08: 0000000000000282 R09: 0000000000000000
[   28.800905] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   28.808231] R13: 000000000000a16d R14: ffff88808d7488d0 R15: 1ffff110136e6f88
[   28.815525]  ? dput.part.0+0x13d/0x710
[   28.819396]  ? __ww_mutex_wakeup_for_backoff+0x210/0x210
[   28.824824]  ? ovl_unlink+0x20/0x20
[   28.828436]  ? lock_downgrade+0x740/0x740
[   28.832595]  ? dput.part.0+0x27/0x710
[   28.836370]  ? dput.part.0+0x164/0x710
[   28.840550]  ? ovl_nlink_start+0x2b5/0x460
[   28.844777]  ovl_link+0x14f/0x190
[   28.848214]  ? ovl_create+0x30/0x30
[   28.851822]  vfs_link+0x6d5/0xb40
[   28.855250]  SyS_linkat+0x3e5/0x6a0
[   28.859287]  ? SyS_symlink+0x30/0x30
[   28.862990]  ? mntput+0x5c/0x80
[   28.866250]  ? SyS_chdir+0x10d/0x1a0
[   28.869964]  ? SyS_access+0x20/0x20
[   28.873567]  ? do_syscall_64+0x4c/0x640
[   28.877516]  ? SyS_linkat+0x6a0/0x6a0
[   28.881291]  do_syscall_64+0x1d5/0x640
[   28.885160]  entry_SYSCALL_64_after_hwframe+0x5e/0xd3
[   28.890324] RIP: 0033:0x7fdfac923859
[   28.894008] RSP: 002b:00007ffef4861008 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
[   28.901719] RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007fdfac923859
[   28.908964] RDX: 00007fdfac923859 RSI: 0000000020000880 RDI: 0000000020000000
[   28.916211] RBP: 00007fdfac8e3120 R08: 0000000000000000 R09: 0000000000000000
[   28.923456] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdfac8e31b0
[   28.930744] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   28.938439] Kernel Offset: disabled
[   28.942094] Rebooting in 86400 seconds..