WARNING: CPU: 0 PID: 15868 at arch/x86/kernel/traps.c:801 cond_local_irq_disable arch/x86/kernel/traps.c:86 [inline]
WARNING: CPU: 0 PID: 15868 at arch/x86/kernel/traps.c:801 do_debug+0x4d8/0x6e0 arch/x86/kernel/traps.c:815
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 15868 Comm: syz-executor1 Not tainted 4.15.0-rc8+ #268
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:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1096
RIP: 0010:cond_local_irq_disable arch/x86/kernel/traps.c:86 [inline]
RIP: 0010:do_debug+0x4d8/0x6e0 arch/x86/kernel/traps.c:815
RSP: 0018:fffffe000000ee98 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: fffffe000000ef58 RCX: 0000000000000006
RDX: 1fffffc000001dfc RSI: 1ffff10038b691d0 RDI: ffffffff868c8c78
RBP: fffffe000000ef48 R08: fffffe000000efe8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000006001
R13: ffff8801c5b485c0 R14: 1fffffc000001dd8 R15: 0000000000004000
 debug+0x34/0x60 arch/x86/entry/entry_64.S:1249
RIP: 0010:arch_futex_atomic_op_inuser arch/x86/include/asm/futex.h:61 [inline]
RIP: 0010:futex_atomic_op_inuser kernel/futex.c:1606 [inline]
RIP: 0010:futex_wake_op kernel/futex.c:1655 [inline]
RIP: 0010:do_futex+0x149a/0x22a0 kernel/futex.c:3555
RSP: 0018:ffff8801c257fa20 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90000c73800 RCX: ffffffff8164cafb
RDX: 0000000000000000 RSI: ffffc90001c39000 RDI: 0000000000000000
RBP: ffff8801c257fe38 R08: 1ffff100384afe83 R09: 0000000000000004
R10: ffff8801c257f8d8 R11: 0000000000000004 R12: ffff8801c5b485c0
R13: 0000000020000000 R14: dffffc0000000000 R15: ffff8801c257fe10
 </#DB>
 SYSC_futex kernel/futex.c:3605 [inline]
 SyS_futex+0x260/0x390 kernel/futex.c:3573
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x452e99
RSP: 002b:00007f5f3167fc58 EFLAGS: 00000212 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f5f31680700 RCX: 0000000000452e99
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 000000002036bffc
RBP: 0000000000000000 R08: 0000000020000000 R09: 0000000020000000
R10: 0000000020fd6ff0 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a2f7ef R14: 00007f5f316809c0 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..