RBP: 0000000000000006 R08: 00007ffd78e51370 R09: 6f6f6c2f7665642f
R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000005
R13: 00007ffd78e51330 R14: 0000000000000000 R15: 0000000000000005
------------[ cut here ]------------
 0
WARNING: CPU: 1 PID: 8323 at fs/super.c:1163 kill_block_super+0xbe/0xe0 fs/super.c:1163
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8323 Comm: syz-executor113 Not tainted 4.14.202-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
Node 1 
 __warn.cold+0x20/0x4b kernel/panic.c:547
 report_bug+0x208/0x249 lib/bug.c:186
 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
Normal free:4041664kB min:53696kB low:67120kB high:80544kB active_anon:0kB inactive_anon:0kB active_file:140kB inactive_file:0kB unevictable:0kB writepending:4kB present:4194304kB managed:4128256kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:kill_block_super+0xbe/0xe0 fs/super.c:1163
RSP: 0018:ffff888099597bc8 EFLAGS: 00010297
lowmem_reserve[]:
 0
RAX: ffff8880a0dd6500 RBX: 0000000000000000 RCX: 1ffff110141badb6
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff888090b7acb0
RBP: ffff888091274e00 R08: ffffffff8b997f70 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8880a0dd6500 R12: ffff888090b7a800
R13: ffffffff89061330 R14: ffffffff88f44cc0 R15: dffffc0000000000
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 sget_userns+0x9c4/0xc10 fs/super.c:537
 0
 sget+0xd1/0x110 fs/super.c:572
 mount_bdev+0xcd/0x360 fs/super.c:1107
 0
 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:2549 [inline]
 do_mount+0xe53/0x2a00 fs/namespace.c:2879
 0
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3072
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
 0
RIP: 0033:0x44844a
RSP: 002b:00007ffd78e51328 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd78e51370 RCX: 000000000044844a
RDX: 0000000020000140 RSI: 0000000020000180 RDI: 00007ffd78e51330
RBP: 0000000000000006 R08: 00007ffd78e51370 R09: 6f6f6c2f7665642f
R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000005
R13: 00007ffd78e51330 R14: 0000000000000000 R15: 0000000000000005
Kernel Offset: disabled
Rebooting in 86400 seconds..