if (WARN_ON_ONCE(local_xchg(&rb->aux_nest, 1)))
*** perf_fuzzer 0.31-pre *** by Vince Weaver
Linux version 4.1.0+ x86_64
Processor: Intel 6/60/3
Seeding random number generator with 1435912557
/proc/sys/kernel/perf_event_max_sample_rate currently: 250/s
/proc/sys/kernel/perf_event_paranoid currently: 0
Logging perf_event_open() failures: no
Running fsync after every syscall: no
To reproduce, try: ./perf_fuzzer -s 30000 -r 1435912557
Pid=28074, sleeping 1s
==================================================
Fuzzing the following syscalls:
mmap perf_event_open close read write ioctl fork prctl poll
*NOT* Fuzzing the following syscalls:
Also attempting the following:
signal-handler-on-overflow busy-instruction-loop accessing-perf-proc-and-sys-files trashing-the-mmap-page
*NOT* attempting the following:
==================================================
Iteration 10000
Open attempts: 114865 Successful: 917 Currently open: 49
EPERM : 18
ENOENT : 681
E2BIG : 10083
EBADF : 9591
EBUSY : 3
EINVAL : 93247
EOPNOTSUPP : 325
Type (Hardware 191/16111)(software 341/16759)(tracepoint 76/16367)(Cache 54/14289)(cpu 212/16536)(breakpoint 16/16489)(power 1/2093)(intel_bts 25/2066)(uncore_imc 1/2238)(#9 0/12)(#10 0/8)(#11 0/5)(#12 0/9)(#13 0/2)(#14 0/10)(>14 0/11871)
Close: 868/868 Successful
Read: 790/889 Successful
Write: 0/883 Successful
Ioctl: 392/901 Successful: (ENABLE 99/99)(DISABLE 97/97)(REFRESH 3/75)(RESET 87/87)(PERIOD 12/101)(SET_OUTPUT 6/81)(SET_FILTER 0/89)(ID 88/88)(SET_BPF 0/82)(#9 0/0)(#10 0/0)(#11 0/0)(#12 0/0)(#13 0/0)(#14 0/0)(>14 0/102)
Mmap: 473/1078 Successful: (MMAP 473/1078)(TRASH 130/153)(READ 12/138)(UNMAP 469/1031)(AUX 0/264)(AUX_READ 1/9)
Prctl: 910/910 Successful
Fork: 475/475 Successful
Poll: 917/932 Successful
Access: 425/898 Successful
Overflows: 0
[44655.375617] ------------[ cut here ]------------
[44655.381034] WARNING: CPU: 3 PID: 28074 at kernel/events/ring_buffer.c:294 perf_aux_output_begin+0x1a8/0x1c0()
[44655.392172] Modules linked in: fuse snd_hda_codec_hdmi i915 x86_pkg_temp_thermal intel_powerclamp intel_rapl iosf_mbi coretemp kvm_intel psmouse kvm snd_hda_codec_realtek snd_hda_codec_generic crct10dif_pclmul iTCO_wdt crc32_pclmul serio_raw pcspkr ghash_clmulni_intel snd_hda_intel snd_hda_codec hmac iTCO_vendor_support evdev ppdev drbg ansi_cprng drm_kms_helper snd_hda_core drm parport_pc aesni_intel aes_x86_64 lrw gf128mul snd_hwdep glue_helper ablk_helper cryptd i2c_algo_bit snd_pcm parport snd_timer snd mei_me wmi processor video battery i2c_i801 button lpc_ich soundcore mfd_core tpm_tis tpm mei sg sr_mod sd_mod cdrom ehci_pci ehci_hcd ahci libahci libata xhci_pci xhci_hcd e1000e ptp crc32c_intel fan scsi_mod usbcore pps_core usb_common thermal thermal_sys
[44655.469242] CPU: 3 PID: 28074 Comm: perf_fuzzer Tainted: G W 4.1.0+ #162
[44655.478088] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014
[44655.486480] ffffffff81a29b45 ffff88011eac3c58 ffffffff8169e763 0000000000000000
[44655.494987] 0000000000000000 ffff88011eac3c98 ffffffff8106ecba 000000000000cf40
[44655.503453] ffff880036dd5c00 ffff88011eaccf40 ffff8800c2670800 000000000000cf40
[44655.512032] Call Trace:
[44655.515103] [] dump_stack+0x45/0x57
[44655.521749] [] warn_slowpath_common+0x8a/0xc0
[44655.528702] [] warn_slowpath_null+0x1a/0x20
[44655.535418] [] perf_aux_output_begin+0x1a8/0x1c0
[44655.542548] [] bts_event_add+0x6d/0x140
[44655.548917] [] event_sched_in.isra.85+0xf6/0x2e0
[44655.556117] [] group_sched_in+0xae/0x1c0
[44655.562568] [] ? native_sched_clock+0x28/0x90
[44655.569495] [] ctx_sched_in+0x1d8/0x3e0
[44655.575889] [] perf_event_sched_in+0x64/0x90
[44655.582680] [] perf_mux_hrtimer_handler+0x114/0x1f0
[44655.590164] [] ? perf_event_context_sched_in+0x150/0x150
[44655.598124] [] __hrtimer_run_queues+0xd3/0x260
[44655.605121] [] hrtimer_interrupt+0xab/0x1b0
[44655.611886] [] local_apic_timer_interrupt+0x3c/0x70
[44655.619364] [] smp_apic_timer_interrupt+0x41/0x60
[44655.626618] [] apic_timer_interrupt+0x6b/0x70
[44655.633506]
[44655.635582] ---[ end trace 1b52d9dc94e8716c ]---
*** perf_fuzzer 0.31-pre *** by Vince Weaver
Linux version 4.1.0-rc7+ x86_64
Processor: Intel 6/60/3
Seeding random number generator with 1434065037
/proc/sys/kernel/perf_event_max_sample_rate currently: 50000/s
/proc/sys/kernel/perf_event_paranoid currently: 1
Logging perf_event_open() failures: no
Running fsync after every syscall: no
To reproduce, try: ./perf_fuzzer -s 30000 -r 1434065037
Pid=17043, sleeping 1s
==================================================
Fuzzing the following syscalls:
mmap perf_event_open close read write ioctl fork prctl poll
*NOT* Fuzzing the following syscalls:
Also attempting the following:
signal-handler-on-overflow busy-instruction-loop accessing-perf-proc-and-sys-files trashing-the-mmap-page
*NOT* attempting the following:
==================================================
Iteration 10000
Open attempts: 149044 Successful: 967 Currently open: 84
EPERM : 21
ENOENT : 865
E2BIG : 12954
EBADF : 12584
EACCES : 610
EBUSY : 8
EINVAL : 120702
EOPNOTSUPP : 333
Type (Hardware 215/20957)(software 356/21563)(tracepoint 75/21550)(Cache 68/18818)(cpu 192/21199)(breakpoint 11/21207)(power 0/2675)(intel_bts 50/2628)(uncore_imc 0/2747)(#9 0/16)(#10 0/18)(#11 0/8)(#12 0/10)(#13 0/7)(#14 0/12)(>14 0/15629)
Close: 883/883 Successful
Read: 784/876 Successful
Write: 0/943 Successful
Ioctl: 374/851 Successful: (ENABLE 93/93)(DISABLE 82/82)(REFRESH 6/103)(RESET 79/79)(PERIOD 16/79)(SET_OUTPUT 9/79)(SET_FILTER 0/88)(ID 89/89)(SET_BPF 0/89)(#9 0/0)(#10 0/0)(#11 0/0)(#12 0/0)(#13 0/0)(#14 0/0)(>14 0/70)
Mmap: 473/1119 Successful: (MMAP 473/1119)(TRASH 119/140)(READ 14/134)(UNMAP 466/1045)(AUX 1/262)(AUX_READ 2/13)
Prctl: 908/908 Successful
Fork: 438/438 Successful
Poll: 894/923 Successful
Access: 446/898 Successful
Overflows: 1
SIGIOs due to RT signal queue full: 0
[27716.779727] ------------[ cut here ]------------
[27716.785131] WARNING: CPU: 2 PID: 17655 at kernel/events/ring_buffer.c:282 perf_aux_output_begin+0x1ce/0x1f0()
[27716.796157] Modules linked in: fuse x86_pkg_temp_thermal intel_powerclamp intel_rapl iosf_mbi coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic snd_hda_intel snd_hda_controller crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_hda_codec aesni_intel snd_hda_core aes_x86_64 iTCO_wdt lrw snd_hwdep gf128mul snd_pcm iTCO_vendor_support ppdev i915 snd_timer glue_helper evdev ablk_helper snd cryptd mei_me mei psmouse pcspkr soundcore serio_raw lpc_ich drm_kms_helper parport_pc battery tpm_tis mfd_core parport drm video tpm i2c_i801 i2c_algo_bit wmi processor button sg sr_mod cdrom sd_mod ehci_pci ehci_hcd ahci libahci libata xhci_pci xhci_hcd e1000e ptp scsi_mod crc32c_intel usbcore pps_core usb_common thermal fan thermal_sys
[27716.873350] CPU: 2 PID: 17655 Comm: perf_fuzzer Tainted: G W 4.1.0-rc7+ #155
[27716.882671] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014
[27716.891168] ffffffff81a230f2 ffff8800cf9afc68 ffffffff816d7229 0000000000000000
[27716.899782] 0000000000000000 ffff8800cf9afca8 ffffffff81072eba 000000000000cf80
[27716.908372] ffff880036d85a00 ffff88011ea8cf80 ffff880119106000 000000000000cf80
[27716.916981] Call Trace:
[27716.920180] [] dump_stack+0x45/0x57
[27716.926250] [] warn_slowpath_common+0x8a/0xc0
[27716.933244] [] warn_slowpath_null+0x1a/0x20
[27716.939999] [] perf_aux_output_begin+0x1ce/0x1f0
[27716.947225] [] ? perf_event_update_userpage+0x5/0x170
[27716.954875] [] bts_event_add+0x6d/0x150
[27716.961259] [] event_sched_in.isra.85+0xfb/0x330
[27716.968495] [] group_sched_in+0xba/0x1e0
[27716.974957] [] ? native_sched_clock+0x2a/0x90
[27716.981888] [] ctx_sched_in+0x1d0/0x3f0
[27716.988274] [] perf_event_sched_in+0x69/0xa0
[27716.995082] [] perf_event_context_sched_in+0x90/0x160
[27717.002714] [] __perf_event_task_sched_in+0xa8/0xc0
[27717.010160] [] finish_task_switch+0xed/0x140
[27717.016988] [] ? __switch_to+0x263/0x5d0
[27717.023400] [] schedule_tail+0x11/0xa0
[27717.029652] [] ret_from_fork+0xf/0x70
[27717.035806] ---[ end trace bdbfeef5d81e5fa4 ]---