[ 61.333982] WARNING: CPU: 1 PID: 1853 at arch/x86/kernel/cpu/perf_event.c:1082 x86_pmu_start+0x46/0xf5() [ 61.333986] Modules linked in: loop snd_hda_codec_analog snd_hda_codec_generic ppdev microcode i2c_i801 i915 drm_kms_helper iTCO_wdt drm iTCO_vendor_support evdev i2c_algo_bit i2c_core lpc_ich pcspkr psmouse parport_pc parport serio_raw snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore mfd_core tpm_tis tpm video button acpi_cpufreq processor thermal_sys sr_mod cdrom sd_mod crc_t10dif crct10dif_generic crct10dif_common ata_generic ata_piix libata scsi_mod tg3 ptp pps_core libphy floppy uhci_hcd ehci_pci ehci_hcd usbcore usb_common [ 61.334067] CPU: 1 PID: 1853 Comm: perf_fuzzer Not tainted 3.15.0-rc4+ #1 [ 61.334071] Hardware name: LENOVO 88088NU/LENOVO, BIOS 2JKT37AUS 07/12/2007 [ 61.334075] 0000000000000006 ffffffff813e1e25 0000000000000000 ffffffff810376aa [ 61.334082] ffffffff81011588 ffff8800377b8400 ffff88003f50bb50 000000000000000c [ 61.334088] 0000000000000002 ffffffff81011588 ffff8800377b8400 ffff88003f50bb50 [ 61.334095] Call Trace: [ 61.334099][ ] ? dump_stack+0x41/0x51 [ 61.334116] [ ] ? warn_slowpath_common+0x74/0x89 [ 61.334122] [ ] ? x86_pmu_start+0x46/0xf5 [ 61.334128] [ ] ? x86_pmu_start+0x46/0xf5 [ 61.334133] [ ] ? x86_pmu_enable+0x14c/0x22c [ 61.334140] [ ] ? __perf_event_task_sched_in+0x112/0x112 [ 61.334146] [ ] ? perf_cpu_hrtimer_handler+0xe1/0x120 [ 61.334152] [ ] ? __run_hrtimer+0x89/0x139 [ 61.334157] [ ] ? hrtimer_interrupt+0xdd/0x1be [ 61.334165] [ ] ? smp_trace_apic_timer_interrupt+0x34/0x93 [ 61.334170] [ ] ? trace_apic_timer_interrupt+0x6a/0x70 [ 61.334173] [ ] ? system_call_fastpath+0x1a/0x1f [ 61.334181] ---[ end trace a88368266e292df9 ]--- [ 63.611570] perf interrupt took too long (2526 > 2500), lowering kernel.perf_event_max_sample_rate to 50000 [ 66.864641] perf interrupt took too long (5011 > 5000), lowering kernel.perf_event_max_sample_rate to 25000
*** perf_fuzzer 0.28 *** by Vince Weaver Linux version 3.14.0+ x86_64 Processor: Intel 6/60/3 Seeding random number generator with 1396295554 /proc/sys/kernel/perf_event_max_sample_rate currently: 6250/s /proc/sys/kernel/perf_event_paranoid currently: 1 Logging perf_event_open() failures: no Running fsync after every syscall: no Run as: ./perf_fuzzer -t OCIRMQWPFpAi -s 50000 Pid=4019, 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: busy-instruction-loop accessing-perf-proc-and-sys-files trashing-the-mmap-page *NOT* attempting the following: signal-handler-on-overflow ================================================== Iteration 10000 Open attempts: 320459 Successful: 901 EPERM : 19 ENOENT : 826 E2BIG : 37162 EBADF : 5294 EACCES : 225 EINVAL : 275319 ENOSPC : 71 EOPNOTSUPP : 642 Close attempts: 898 Successful: 898 Read attempts: 889 Successful: 748 Write attempts: 853 Successful: 0 Ioctl attempts: 907 Successful: 416 Mmap attempts: 901 Successful: 280 Prctl attempts: 900 Successful: 900 Fork attempts: 447 Successful: 447 Poll attempts: 947 Successful: 3 Access attempts: 883 Successful: 439 Trash mmap attempts: 929 Successful: 929 Overflows: 0 SIGIOs due to RT signal queue full: 0 Iteration 20000 Open attempts: 323726 Successful: 923 EPERM : 19 ENOENT : 866 E2BIG : 37749 EBADF : 5456 EACCES : 245 EINVAL : 277783 ENOSPC : 78 EOPNOTSUPP : 607 Close attempts: 912 Successful: 912 Read attempts: 911 Successful: 787 Write attempts: 902 Successful: 0 Ioctl attempts: 919 Successful: 431 Mmap attempts: 923 Successful: 272 Prctl attempts: 878 Successful: 878 Fork attempts: 443 Successful: 443 Poll attempts: 891 Successful: 24 Access attempts: 875 Successful: 436 Trash mmap attempts: 891 Successful: 891 Overflows: 0 SIGIOs due to RT signal queue full: 0 [ 9401.346216] ------------[ cut here ]------------ [ 9401.351261] WARNING: CPU: 1 PID: 4019 at arch/x86/kernel/cpu/perf_event.c:1076 x86_pmu_start+0xc6/0x100() [ 9401.361647] Modules linked in: nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc fuse x86_pkg_temp_thermal snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic intel_powerclamp snd_hda_intel coretemp snd_hda_codec snd_hwdep kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel parport_pc i915 snd_pcm drm_kms_helper snd_seq aesni_intel drm snd_seq_device iTCO_wdt aes_x86_64 lrw iTCO_vendor_support battery gf128mul glue_helper mei_me tpm_tis tpm parport snd_timer ablk_helper lpc_ich mfd_core i2c_algo_bit video wmi psmouse snd mei i2c_i801 button pcspkr i2c_core processor serio_raw cryptd evdev soundcore sg sd_mod sr_mod crc_t10dif cdrom crct10dif_common hid_generic usbhid hid ahci ehci_pci e1000e xhci_hcd ehci_hcd libahci ptp libata usbcore pps_core crc32c_intel scsi_mod thermal usb_common fan thermal_sys [ 9401.443625] CPU: 1 PID: 4019 Comm: perf_fuzzer Not tainted 3.14.0+ #14 [ 9401.450623] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014 [ 9401.458576] 0000000000000009 ffff88011ea43dd8 ffffffff8155a210 0000000000000000 [ 9401.466646] ffff88011ea43e10 ffffffff810651ad ffff880118747800 ffff88011ea4ca60 [ 9401.474701] 0000000000000001 ffff88011ea4cc88 0000000000000002 ffff88011ea43e20 [ 9401.482762] Call Trace: [ 9401.485384][ ] dump_stack+0x45/0x56 [ 9401.491616] [ ] warn_slowpath_common+0x7d/0xa0 [ 9401.498074] [ ] warn_slowpath_null+0x1a/0x20 [ 9401.504353] [ ] x86_pmu_start+0xc6/0x100 [ 9401.510244] [ ] x86_pmu_enable+0x295/0x310 [ 9401.516335] [ ] perf_pmu_enable+0x27/0x30 [ 9401.522290] [ ] perf_cpu_hrtimer_handler+0xdf/0x1e0 [ 9401.529202] [ ] __run_hrtimer+0x83/0x1e0 [ 9401.535083] [ ] ? perf_event_context_sched_in+0xc0/0xc0 [ 9401.542369] [ ] hrtimer_interrupt+0xf7/0x240 [ 9401.548647] [ ] local_apic_timer_interrupt+0x37/0x60 [ 9401.555660] [ ] smp_apic_timer_interrupt+0x3f/0x60 [ 9401.562480] [ ] apic_timer_interrupt+0x6d/0x80 [ 9401.568924] [ ] ? system_call_fastpath+0x1a/0x1f [ 9401.576208] ---[ end trace da1c478c5edac23b ]---