WARNING: CPU: 0 PID: 8578 at arch/x86/kernel/traps.c:780 cond_local_irq_disable arch/x86/kernel/traps.c:85 [inline]
WARNING: CPU: 0 PID: 8578 at arch/x86/kernel/traps.c:780 do_debug+0x4d8/0x6e0 arch/x86/kernel/traps.c:794
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 8578 Comm: syz-executor2 Not tainted 4.14.0+ #191
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <#DB>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:177
 fixup_bug arch/x86/kernel/traps.c:246 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:926
RIP: 0010:cond_local_irq_disable arch/x86/kernel/traps.c:85 [inline]
RIP: 0010:do_debug+0x4d8/0x6e0 arch/x86/kernel/traps.c:794
RSP: 0018:ffff8801db40fe98 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8801db40ff58 RCX: 0000000000000000
RDX: 1ffff1003b681ffc RSI: 0000000000000001 RDI: ffffffff85ecb558
RBP: ffff8801db40ff48 R08: ffff8801db40ffe8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000004001
R13: ffff8801c06b2040 R14: 1ffff1003b681fd8 R15: 0000000000004000
 debug+0x34/0x70 arch/x86/entry/entry_64.S:1077
RIP: 0010:exact_copy_from_user fs/namespace.c:2701 [inline]
RIP: 0010:copy_mount_options+0x193/0x2e0 fs/namespace.c:2734
RSP: 0018:ffff8801d9387d90 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000020000000 RCX: ffffffff81b7949b
RDX: 0000000000000161 RSI: ffffc900035ea000 RDI: ffff8801c06b35e0
RBP: ffff8801d9387dc8 R08: 0000000000000000 R09: 1ffff1003b270f0a
R10: 0000000066f8aeac R11: 000000007f24cb7a R12: 0000000000001000
R13: ffff8801d1dcc9c0 R14: ffff8801d1dcc9c0 R15: 0000000020001000
 </#DB>
 SYSC_mount fs/namespace.c:3052 [inline]
 SyS_mount+0x87/0x120 fs/namespace.c:3034
 do_syscall_64+0x26c/0x920 arch/x86/entry/common.c:285
 entry_SYSCALL64_slow_path+0x25/0x25
RIP: 0033:0x452879
RSP: 002b:00007fa8b45f4be8 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879
RDX: 00000000200fdffa RSI: 00000000209a5ff8 RDI: 000000002050b000
RBP: 0000000000000394 R08: 0000000020000000 R09: 0000000000000000
R10: 0000000000000010 R11: 0000000000000212 R12: 00000000006f2680
R13: 00000000ffffffff R14: 00007fa8b45f56d4 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..