------------[ cut here ]------------
WARNING: CPU: 0 PID: 11481 at fs/super.c:1163 kill_block_super+0xbe/0xe0 fs/super.c:1163
Kernel panic - not syncing: panic_on_warn set ...

NILFS (loop3): unable to read superblock
CPU: 0 PID: 11481 Comm: syz-executor.2 Not tainted 4.14.303-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 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:kill_block_super+0xbe/0xe0 fs/super.c:1163
RSP: 0018:ffff888047d97ae8 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc900071bd000
RDX: 0000000000040000 RSI: ffffffff8187798e RDI: ffff8880b1bfec30
RBP: ffff88809a08c100 R08: ffffffff8b9c13b0 R09: 0000000000000001
R10: 0000000000000000 R11: ffff888048e4e1c0 R12: ffff8880b1bfe780
R13: ffffffff89260790 R14: ffffffff88f45bc0 R15: dffffc0000000000
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 sget_userns+0x9c4/0xc10 fs/super.c:537
 sget+0xd1/0x110 fs/super.c:572
 nilfs_mount+0x33b/0xd00 fs/nilfs2/super.c:1314
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2572 [inline]
 do_mount+0xe65/0x2a30 fs/namespace.c:2905
 SYSC_mount fs/namespace.c:3121 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3098
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f5dc90a40c9
RSP: 002b:00007f5dc7616168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5dc91c3f80 RCX: 00007f5dc90a40c9
RDX: 00000000200016c0 RSI: 0000000020001680 RDI: 0000000020001640
RBP: 00007f5dc76161d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007fffa76e0f8f R14: 00007f5dc7616300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..