R13: 0000000000000016 R14: 00007f8f043fc6d4 R15: ffffffffffffffff
WARNING: CPU: 0 PID: 29971 at kernel/tracepoint.c:242 tracepoint_remove_func kernel/tracepoint.c:242 [inline]
WARNING: CPU: 0 PID: 29971 at kernel/tracepoint.c:242 tracepoint_probe_unregister+0x6b3/0x870 kernel/tracepoint.c:323
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 29971 Comm: syz-executor4 Not tainted 4.15.0-rc8-next-20180117+ #99
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: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:tracepoint_remove_func kernel/tracepoint.c:242 [inline]
RIP: 0010:tracepoint_probe_unregister+0x6b3/0x870 kernel/tracepoint.c:323
RSP: 0018:ffff8801a91a75f0 EFLAGS: 00010246
RAX: 0000000000010000 RBX: 00000000fffffff4 RCX: ffffffff81732fa3
RDX: 0000000000010000 RSI: ffffc900041b4000 RDI: 0000000000000286
RBP: ffff8801a91a7708 R08: 1ffff10035234e11 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d20e3640
R13: 0000000000000000 R14: ffff8801d20e3610 R15: ffff8801a91a76e0
 trace_event_reg+0xed/0x320 kernel/trace/trace_events.c:309
 perf_trace_event_unreg.isra.2+0xad/0x1f0 kernel/trace/trace_event_perf.c:155
 perf_trace_destroy+0xbc/0x100 kernel/trace/trace_event_perf.c:236
 tp_perf_event_destroy+0x15/0x20 kernel/events/core.c:7954
 _free_event+0x3bd/0x10f0 kernel/events/core.c:4104
 put_event+0x24/0x30 kernel/events/core.c:4187
 perf_event_release_kernel+0x407/0xc10 kernel/events/core.c:4288
 perf_release+0x37/0x50 kernel/events/core.c:4298
 __fput+0x327/0x7e0 fs/file_table.c:209
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0x199/0x270 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x275/0x2f0 arch/x86/entry/common.c:165
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264
 entry_SYSCALL_64_fastpath+0x9e/0xa0
RIP: 0033:0x452e39
RSP: 002b:00007f8f043fbc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000021
RAX: 0000000000000013 RBX: 000000000071bea0 RCX: 0000000000452e39
RDX: 0000000000000000 RSI: 0000000000000013 RDI: 0000000000000015
RBP: 0000000000000065 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006eea18
R13: 0000000000000016 R14: 00007f8f043fc6d4 R15: ffffffffffffffff
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..