Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3039 Comm: syzkaller881964 Not tainted 4.14.0+ #98
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+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:snd_timer_user_info_compat.isra.6+0x3be/0x490 sound/core/timer_compat.c:69
RSP: 0018:ffff8801cd037a70 EFLAGS: 00010293
RAX: ffff8801cd96a280 RBX: 1ffff10039a06f51 RCX: ffffffff8402d83e
RDX: 0000000000000000 RSI: 0000000020a73000 RDI: ffff8801cd2b6eb0
RBP: ffff8801cd037bd0 R08: ffffffff8403ab4b R09: 0000000000000000
R10: ffff8801cd037bd0 R11: ffffffff8747dd60 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8801cd037ba8 R15: ffff8801cd037d18
 __snd_timer_user_ioctl_compat sound/core/timer_compat.c:161 [inline]
 snd_timer_user_ioctl_compat+0x4a6/0x890 sound/core/timer_compat.c:179
 C_SYSC_ioctl fs/compat_ioctl.c:1473 [inline]
 compat_SyS_ioctl+0x151/0x2a30 fs/compat_ioctl.c:1419
 do_syscall_32_irqs_on arch/x86/entry/common.c:327 [inline]
 do_fast_syscall_32+0x3ee/0xf9d arch/x86/entry/common.c:389
 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:125
RIP: 0023:0xf7f8dc79
RSP: 002b:00000000ffcd112c EFLAGS: 00000282 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000080e05411
RDX: 0000000020a73000 RSI: 00000000080ef00c RDI: 000000000000003f
RBP: 0000000000001000 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..