RDX: 00000000200000c0 RSI: 0000000020000000 RDI: 0000000020000080
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000003531
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c
R13: 00007f6fb7b77d90 R14: 0000000000000003 R15: 20c49ba5e353f7cf
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7431 at fs/super.c:1163 kill_block_super+0xbe/0xe0 fs/super.c:1163
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 7431 Comm: syz-executor679 Not tainted 4.14.172-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+0x13e/0x194 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x2f/0x30 kernel/panic.c:547
 report_bug+0x20a/0x248 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
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:kill_block_super+0xbe/0xe0 fs/super.c:1163
RSP: 0018:ffff88808215fc08 EFLAGS: 00010297
RAX: ffff888099bb2280 RBX: 0000000000000000 RCX: 1ffff1101337655e
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff8880a6a52ae0
RBP: ffff8880808c8900 R08: 0000000000000001 R09: 0000000000000001
R10: ffff888099bb2b50 R11: ffff888099bb2280 R12: ffff8880a6a52740
R13: ffff8880808c8a40 R14: ffffffff87d535c0 R15: dffffc0000000000
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 sget_userns+0x9df/0xc30 fs/super.c:537
 sget+0xd1/0x110 fs/super.c:572
 mount_bdev+0xcd/0x370 fs/super.c:1107
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x3c0 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x3c9/0x24f0 fs/namespace.c:2879
 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+0x42/0xb7
RIP: 0033:0x446739
RSP: 002b:00007f6fb7b77d88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446739
RDX: 00000000200000c0 RSI: 0000000020000000 RDI: 0000000020000080
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000003531
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c
R13: 00007f6fb7b77d90 R14: 0000000000000003 R15: 20c49ba5e353f7cf
Kernel Offset: disabled
Rebooting in 86400 seconds..