perf: fuzzer PEBS record without PEBS event! crash

[Vince Weaver]

Hello

running a fresh copy of current git and I can still crash my Haswell test 
machine using the perf_fuzzer.

It looks like the pebs issue still, it triggered the new warning, and
was stuck looping with these messages until I rebooted the system.

[ 1800.285152] ------------[ cut here ]------------
[ 1800.290757] WARNING: CPU: 0 PID: 0 at arch/x86/kernel/cpu/perf_event_intel_ds.c:1210 intel_pmu_drain_pebs_nhm+0x305/0x320()
[ 1800.303301] PEBS record without PEBS event! status=2 pebs_enabled=1 active_mask=200000000
[ 1800.311916] Modules linked in: binfmt_misc intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_hda_codec_hdmi hmac drbg ansi_cprng i915 aesni_intel aes_x86_64 snd_hda_codec_realtek snd_hda_codec_generic lrw snd_hda_intel snd_hda_codec iTCO_wdt gf128mul drm_kms_helper snd_hda_core ppdev iTCO_vendor_support evdev glue_helper ablk_helper cryptd parport_pc snd_hwdep snd_pcm snd_timer psmouse tpm_tis tpm drm i2c_algo_bit sg parport snd pcspkr video serio_raw processor soundcore mei_me lpc_ich mfd_core mei i2c_i801 wmi button battery sr_mod sd_mod cdrom ehci_pci ehci_hcd xhci_pci xhci_hcd ahci libahci libata e1000e ptp usbcore crc32c_intel scsi_mod pps_core usb_common fan thermal
[ 1800.390813] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W       4.2.0+ #173
[ 1800.399488] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014
[ 1800.408243]  ffffffff81a0d828 ffff88011ea03aa8 ffffffff8169da0c ffff88011ea03af0
[ 1800.417089]  ffff88011ea03ae0 ffffffff8106e812 0000000000000001 ffff880119000000
[ 1800.426024]  ffff88011ea0c120 ffff88011900ffc0 ffff880119000000 ffff88011ea03b40
[ 1800.434946] Call Trace:
[ 1800.438453]  <IRQ>  [<ffffffff8169da0c>] dump_stack+0x44/0x55
[ 1800.445504]  [<ffffffff8106e812>] warn_slowpath_common+0x82/0xc0
[ 1800.452832]  [<ffffffff8106e89c>] warn_slowpath_fmt+0x4c/0x50
[ 1800.459879]  [<ffffffff8102f7d5>] intel_pmu_drain_pebs_nhm+0x305/0x320
[ 1800.467725]  [<ffffffff810b6b69>] ? __lock_acquire.isra.31+0x349/0xfc0
[ 1800.475613]  [<ffffffff8102ec38>] intel_pmu_drain_pebs_buffer+0x18/0x20
[ 1800.483550]  [<ffffffff810b6b69>] ? __lock_acquire.isra.31+0x349/0xfc0
[ 1800.491334]  [<ffffffff81156f2f>] ? perf_event_update_userpage+0xff/0x170
[ 1800.499471]  [<ffffffff814025e4>] ? debug_object_activate+0xe4/0x1c0
[ 1800.507184]  [<ffffffff8103076a>] ? intel_stop_scheduling+0x4a/0x70
[ 1800.514756]  [<ffffffff810289ea>] ? perf_assign_events+0x14a/0x2a0
[ 1800.522238]  [<ffffffff81030373>] intel_pmu_pebs_disable+0xf3/0x110
[ 1800.529812]  [<ffffffff8103108b>] intel_pmu_disable_event+0x11b/0x120
[ 1800.537551]  [<ffffffff810291f9>] x86_pmu_stop+0x69/0xc0
[ 1800.544106]  [<ffffffff8102a36f>] x86_pmu_enable+0x9f/0x2f0
[ 1800.550894]  [<ffffffff811522b7>] perf_pmu_enable.part.78+0x7/0x10
[ 1800.558425]  [<ffffffff81156601>] perf_pmu_enable+0x21/0x30
[ 1800.565250]  [<ffffffff81028c38>] x86_pmu_commit_txn+0x78/0xa0
[ 1800.572352]  [<ffffffff8140258e>] ? debug_object_activate+0x8e/0x1c0
[ 1800.580035]  [<ffffffff810b6b69>] ? __lock_acquire.isra.31+0x349/0xfc0
[ 1800.587892]  [<ffffffff810dc40c>] ? hrtimer_start_range_ns+0x1bc/0x3b0
[ 1800.595692]  [<ffffffff811524f0>] ? event_sched_in.isra.84+0xf0/0x310
[ 1800.603470]  [<ffffffff81154c42>] group_sched_in+0x1a2/0x1c0
[ 1800.610424]  [<ffffffff811558aa>] __perf_event_enable+0x25a/0x290
[ 1800.617823]  [<ffffffff81151d90>] ? cpu_clock_event_start+0x30/0x30
[ 1800.625417]  [<ffffffff81151dca>] remote_function+0x3a/0x40
[ 1800.632238]  [<ffffffff810efcef>] flush_smp_call_function_queue+0x7f/0x160
[ 1800.640448]  [<ffffffff810f06b3>] generic_smp_call_function_single_interrupt+0x13/0x60
[ 1800.649816]  [<ffffffff810494a4>] smp_trace_call_function_single_interrupt+0x34/0xb0
[ 1800.658950]  [<ffffffff816a6332>] trace_call_function_single_interrupt+0x82/0x90
[ 1800.667678]  <EOI>  [<ffffffff81541890>] ? cpuidle_enter_state+0x130/0x270
[ 1800.676002]  [<ffffffff8154186b>] ? cpuidle_enter_state+0x10b/0x270
[ 1800.683645]  [<ffffffff81541a07>] cpuidle_enter+0x17/0x20
[ 1800.690274]  [<ffffffff810afec2>] call_cpuidle+0x32/0x60
[ 1800.696781]  [<ffffffff815419e3>] ? cpuidle_select+0x13/0x20
[ 1800.703655]  [<ffffffff810b0106>] cpu_startup_entry+0x216/0x2d0
[ 1800.710809]  [<ffffffff81693798>] rest_init+0xb8/0xc0
[ 1800.716949]  [<ffffffff81d41f74>] start_kernel+0x447/0x454
[ 1800.723593]  [<ffffffff81d41120>] ? early_idt_handler_array+0x120/0x120
[ 1800.731414]  [<ffffffff81d41339>] x86_64_start_reservations+0x2a/0x2c
[ 1800.739055]  [<ffffffff81d41476>] x86_64_start_kernel+0x13b/0x14a
[ 1800.746311] ---[ end trace 852faffdf2d3f87f ]---
[ 1800.751912] ------------[ cut here ]------------
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