NILFS (loop2): repaired inode bitmap for reserved inodes
NILFS (loop2): nilfs_palloc_commit_free_entry (ino=6): entry number 13 already freed
------------[ cut here ]------------
WARNING: CPU: 0 PID: 9410 at fs/inode.c:966 unlock_new_inode+0x9a/0xc0 fs/inode.c:966
Kernel panic - not syncing: kernel: panic_on_warn set ...

CPU: 0 PID: 9410 Comm: syz-executor.2 Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x21d/0x451 kernel/panic.c:247
 check_panic_on_warn.cold+0x19/0x35 kernel/panic.c:171
 __warn+0xdf/0x1e0 kernel/panic.c:603
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967
RIP: 0010:unlock_new_inode+0x9a/0xc0 fs/inode.c:966
RSP: 0018:ffff888203707c60 EFLAGS: 00010202
RAX: 0000000000040000 RBX: ffff88805350c7f8 RCX: ffffc900096f5000
RDX: 0000000000000480 RSI: ffffffff818ce3ea RDI: ffff88805350c884
RBP: 0000000000000000 R08: ffffffff8b9ad2f8 R09: 0000000000040630
R10: ffff88800ee8cca8 R11: ffff88800ee8c380 R12: ffff88805350c8d0
R13: ffff88805350c880 R14: ffff888201794938 R15: ffff888201794600
 nilfs_new_inode+0x637/0x860 fs/nilfs2/inode.c:429
 nilfs_mkdir fs/nilfs2/namei.c:225 [inline]
 nilfs_mkdir+0xe0/0x300 fs/nilfs2/namei.c:213
 vfs_mkdir+0x463/0x6e0 fs/namei.c:3851
 SYSC_mkdirat fs/namei.c:3874 [inline]
 SyS_mkdirat+0x1fd/0x270 fs/namei.c:3858
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7ff5b88530f9
RSP: 002b:00007ff5b6dc5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007ff5b8972f80 RCX: 00007ff5b88530f9
RDX: 0000000000000000 RSI: 00000000200010c0 RDI: 0000000000000006
RBP: 00007ff5b88aeae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd27e6430f R14: 00007ff5b6dc5300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..