------------[ cut here ]------------
WARNING: CPU: 1 PID: 2993 at arch/x86/kernel/traps.c:776 cond_local_irq_disable arch/x86/kernel/traps.c:85 [inline]
WARNING: CPU: 1 PID: 2993 at arch/x86/kernel/traps.c:776 do_debug+0x4d8/0x6e0 arch/x86/kernel/traps.c:790
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 2993 Comm: syz-executor0 Not tainted 4.14.0-rc2+ #13
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <#DB>
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x417 kernel/panic.c:181
 __warn+0x1c4/0x1d9 kernel/panic.c:542
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178
 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:261
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:cond_local_irq_disable arch/x86/kernel/traps.c:85 [inline]
RIP: 0010:do_debug+0x4d8/0x6e0 arch/x86/kernel/traps.c:790
RSP: 0018:ffff8801db30fe98 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8801db30ff58 RCX: 0000000000000000
RDX: 1ffff1003b661ffc RSI: 0000000000000001 RDI: ffffffff85ac99f8
RBP: ffff8801db30ff48 R08: ffff8801db30ffe8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000e001
R13: ffff8801ce90a000 R14: 1ffff1003b661fd8 R15: 0000000000004000
 debug+0x34/0x70 arch/x86/entry/entry_64.S:1056
RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:44 [inline]
RIP: 0010:strncpy_from_user+0x188/0x430 lib/strncpy_from_user.c:117
RSP: 0018:ffff8801ce89fb90 EFLAGS: 00000246
RAX: 6d766b2f7665642f RBX: ffff8801ce89fc28 RCX: 1ffffffff0b45802
RDX: 0000000000000000 RSI: 0000000000000fe4 RDI: ffff8801ce89fbf0
RBP: ffff8801ce89fc50 R08: ffff8801dae08780 R09: ffff8801cf186140
R10: 0000000000000000 R11: ffffed0039e30e27 R12: 0000000000000fe4
R13: 0000000000000fe4 R14: 0000000020000000 R15: 8080808080808080
 </#DB>
 getname_flags+0x10e/0x580 fs/namei.c:148
 getname+0x19/0x20 fs/namei.c:208
 do_sys_open+0x2e7/0x6d0 fs/open.c:1053
 C_SYSC_openat fs/open.c:1105 [inline]
 compat_SyS_openat+0x2d/0x40 fs/open.c:1103
 do_syscall_32_irqs_on arch/x86/entry/common.c:329 [inline]
 do_fast_syscall_32+0x3f2/0xf05 arch/x86/entry/common.c:391
 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124
RIP: 0023:0xf7f64c79
RSP: 002b:00000000f7f6005c EFLAGS: 00000296 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 0000000020000000
RDX: 0000000000080000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..