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Message-ID: <alpine.DEB.2.10.1404181048120.27290@vincent-weaver-1.um.maine.edu> Date: Fri, 18 Apr 2014 10:51:26 -0400 (EDT) From: Vince Weaver <vincent.weaver@...ne.edu> To: Vince Weaver <vincent.weaver@...ne.edu> cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>, Steven Rostedt <rostedt@...dmis.org> Subject: Re: [perf] more perf_fuzzer memory corruption On Fri, 18 Apr 2014, Vince Weaver wrote: > > OK, since the slab corruption was happening to event->hlist_entry->pprev > I added a WARN() call to every modifier of pprev under > include/linux/*list*.h to see what was stomping over freed memory. > > This is what came up: actually there were 3 hits on the WARNING before the machine locked up. Apr 18 10:36:11 haswell kernel: [ 998.316177] ------------[ cut here ]------------ Apr 18 10:36:11 haswell kernel: [ 998.321188] WARNING: CPU: 3 PID: 20717 at include/linux/rculist.h:410 perf_trace_add+0xc1/0x100() Apr 18 10:36:11 haswell kernel: [ 998.330681] Modules linked in: fuse x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi kvm snd_hda_intel iTCO_wdt snd_hda_controller i915 snd_hda_codec evdev crct10dif_pclmul drm_kms_helper iTCO_vendor_support snd_hwdep snd_pcm drm crc32_pclmul snd_seq mei_me parport_pc parport lpc_ich mfd_core psmouse ghash_clmulni_intel snd_timer snd_seq_device mei snd aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd soundcore pcspkr serio_raw i2c_i801 processor video i2c_algo_bit i2c_core wmi button battery tpm_tis tpm sg sd_mod sr_mod crc_t10dif crct10dif_common cdrom ahci ehci_pci libahci xhci_hcd e1000e libata ehci_hcd ptp scsi_mod crc32c_intel usbcore pps_core usb_common fan thermal thermal_sys Apr 18 10:36:11 haswell kernel: [ 998.405736] CPU: 3 PID: 20717 Comm: perf_fuzzer Not tainted 3.15.0-rc1+ #63 Apr 18 10:36:11 haswell kernel: [ 998.413162] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014 Apr 18 10:36:11 haswell kernel: [ 998.420987] 0000000000000009 ffff880117923c70 ffffffff8164f753 0000000000000000 Apr 18 10:36:11 haswell kernel: [ 998.429016] ffff880117923ca8 ffffffff810647cd ffffe8ffffcc30d8 ffff8800ce29f040 Apr 18 10:36:11 haswell kernel: [ 998.437121] ffffffff81c1ba40 ffff8800cd3d9040 000000da35b18e50 ffff880117923cb8 Apr 18 10:36:11 haswell kernel: [ 998.445246] Call Trace: Apr 18 10:36:11 haswell kernel: [ 998.447910] [<ffffffff8164f753>] dump_stack+0x45/0x56 Apr 18 10:36:11 haswell kernel: [ 998.453451] [<ffffffff810647cd>] warn_slowpath_common+0x7d/0xa0 Apr 18 10:36:11 haswell kernel: [ 998.459871] [<ffffffff810648aa>] warn_slowpath_null+0x1a/0x20 Apr 18 10:36:11 haswell kernel: [ 998.466143] [<ffffffff81125a01>] perf_trace_add+0xc1/0x100 Apr 18 10:36:11 haswell kernel: [ 998.472160] [<ffffffff81136640>] event_sched_in.isra.76+0x90/0x1e0 Apr 18 10:36:11 haswell kernel: [ 998.478849] [<ffffffff811367f9>] group_sched_in+0x69/0x1e0 Apr 18 10:36:11 haswell kernel: [ 998.484812] [<ffffffff81136e45>] __perf_event_enable+0x255/0x260 Apr 18 10:36:11 haswell kernel: [ 998.491370] [<ffffffff81132340>] remote_function+0x40/0x50 Apr 18 10:36:11 haswell kernel: [ 998.497311] [<ffffffff810de116>] generic_exec_single+0x126/0x170 Apr 18 10:36:11 haswell kernel: [ 998.503764] [<ffffffff81132300>] ? task_clock_event_add+0x40/0x40 Apr 18 10:36:11 haswell kernel: [ 998.510432] [<ffffffff810de1c7>] smp_call_function_single+0x67/0xa0 Apr 18 10:36:11 haswell kernel: [ 998.517299] [<ffffffff811312b4>] task_function_call+0x44/0x50 Apr 18 10:36:11 haswell kernel: [ 998.523539] [<ffffffff81136bf0>] ? perf_event_sched_in+0x90/0x90 Apr 18 10:36:11 haswell kernel: [ 998.530085] [<ffffffff81131350>] perf_event_enable+0x90/0xf0 Apr 18 10:36:11 haswell kernel: [ 998.536308] [<ffffffff811312c0>] ? task_function_call+0x50/0x50 Apr 18 10:36:11 haswell kernel: [ 998.542761] [<ffffffff8113142a>] perf_event_for_each_child+0x3a/0xa0 Apr 18 10:36:11 haswell kernel: [ 998.551512] [<ffffffff811379af>] perf_event_task_enable+0x4f/0x80 Apr 18 10:36:11 haswell kernel: [ 998.560080] [<ffffffff8107c015>] SyS_prctl+0x255/0x4b0 Apr 18 10:36:11 haswell kernel: [ 998.567605] [<ffffffff813c1406>] ? lockdep_sys_exit_thunk+0x35/0x67 Apr 18 10:36:11 haswell kernel: [ 998.576333] [<ffffffff816609ed>] system_call_fastpath+0x1a/0x1f Apr 18 10:36:11 haswell kernel: [ 998.584698] ---[ end trace b175966afd57a174 ]--- Apr 18 10:36:12 haswell kernel: [ 998.910691] ------------[ cut here ]------------ Apr 18 10:36:12 haswell kernel: [ 998.917828] WARNING: CPU: 4 PID: 22741 at include/linux/rculist.h:410 perf_swevent_add+0x14c/0x190() Apr 18 10:36:12 haswell kernel: [ 998.930319] Modules linked in: fuse x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi kvm snd_hda_intel iTCO_wdt snd_hda_controller i915 snd_hda_codec evdev crct10dif_pclmul drm_kms_helper iTCO_vendor_support snd_hwdep snd_pcm drm crc32_pclmul snd_seq mei_me parport_pc parport lpc_ich mfd_core psmouse ghash_clmulni_intel snd_timer snd_seq_device mei snd aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd soundcore pcspkr serio_raw i2c_i801 processor video i2c_algo_bit i2c_core wmi button battery tpm_tis tpm sg sd_mod sr_mod crc_t10dif crct10dif_common cdrom ahci ehci_pci libahci xhci_hcd e1000e libata ehci_hcd ptp scsi_mod crc32c_intel usbcore pps_core usb_common fan thermal thermal_sys Apr 18 10:36:12 haswell kernel: [ 999.024710] CPU: 4 PID: 22741 Comm: perf_fuzzer Tainted: G W 3.15.0-rc1+ #63 Apr 18 10:36:12 haswell kernel: [ 999.036194] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014 Apr 18 10:36:12 haswell kernel: [ 999.046972] 0000000000000009 ffff8800ce12dce0 ffffffff8164f753 0000000000000000 Apr 18 10:36:12 haswell kernel: [ 999.057871] ffff8800ce12dd18 ffffffff810647cd ffff8800c9ef6000 ffff8800ce29f040 Apr 18 10:36:12 haswell kernel: [ 999.068652] ffff8800ca4ff3c0 ffff8800c9ef6040 0000000000000000 ffff8800ce12dd28 Apr 18 10:36:12 haswell kernel: [ 999.079416] Call Trace: Apr 18 10:36:12 haswell kernel: [ 999.084718] [<ffffffff8164f753>] dump_stack+0x45/0x56 Apr 18 10:36:12 haswell kernel: [ 999.092858] [<ffffffff810647cd>] warn_slowpath_common+0x7d/0xa0 Apr 18 10:36:12 haswell kernel: [ 999.101848] [<ffffffff810648aa>] warn_slowpath_null+0x1a/0x20 Apr 18 10:36:12 haswell kernel: [ 999.110692] [<ffffffff811320dc>] perf_swevent_add+0x14c/0x190 Apr 18 10:36:12 haswell kernel: [ 999.119529] [<ffffffff81136640>] event_sched_in.isra.76+0x90/0x1e0 Apr 18 10:36:12 haswell kernel: [ 999.128801] [<ffffffff811367f9>] group_sched_in+0x69/0x1e0 Apr 18 10:36:12 haswell kernel: [ 999.137202] [<ffffffff81136ad7>] ctx_sched_in+0x167/0x1f0 Apr 18 10:36:12 haswell kernel: [ 999.145553] [<ffffffff81136b9a>] perf_event_sched_in+0x3a/0x90 Apr 18 10:36:12 haswell kernel: [ 999.154439] [<ffffffff811370db>] perf_event_context_sched_in+0x7b/0xc0 Apr 18 10:36:12 haswell kernel: [ 999.164065] [<ffffffff8113785d>] __perf_event_task_sched_in+0x1dd/0x1f0 Apr 18 10:36:12 haswell kernel: [ 999.173769] [<ffffffff81091398>] finish_task_switch+0xd8/0x120 Apr 18 10:36:12 haswell kernel: [ 999.182555] [<ffffffff81096a07>] schedule_tail+0x27/0xb0 Apr 18 10:36:12 haswell kernel: [ 999.190843] [<ffffffff816608cf>] ret_from_fork+0xf/0xb0 Apr 18 10:36:12 haswell kernel: [ 999.199012] ---[ end trace b175966afd57a175 ]--- Apr 18 10:36:13 haswell kernel: [ 999.778173] ------------[ cut here ]------------ Apr 18 10:36:13 haswell kernel: [ 999.785775] WARNING: CPU: 4 PID: 22755 at include/linux/rculist.h:410 perf_swevent_add+0x14c/0x190() Apr 18 10:36:13 haswell kernel: [ 999.797857] Modules linked in: fuse x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi kvm snd_hda_intel iTCO_wdt snd_hda_controller i915 snd_hda_codec evdev crct10dif_pclmul drm_kms_helper iTCO_vendor_support snd_hwdep snd_pcm drm crc32_pclmul snd_seq mei_me parport_pc parport lpc_ich mfd_core psmouse ghash_clmulni_intel snd_timer snd_seq_device mei snd aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd soundcore pcspkr serio_raw i2c_i801 processor video i2c_algo_bit i2c_core wmi button battery tpm_tis tpm sg sd_mod sr_mod crc_t10dif crct10dif_common cdrom ahci ehci_pci libahci xhci_hcd e1000e libata ehci_hcd ptp scsi_mod crc32c_intel usbcore pps_core usb_common fan thermal thermal_sys Apr 18 10:36:13 haswell kernel: [ 999.884365] CPU: 4 PID: 22755 Comm: perf_fuzzer Tainted: G W 3.15.0-rc1+ #63 Apr 18 10:36:13 haswell kernel: [ 999.894321] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014 Apr 18 10:36:13 haswell kernel: [ 999.903501] 0000000000000009 ffff88011eb03df8 ffffffff8164f753 0000000000000000 Apr 18 10:36:13 haswell kernel: [ 999.912817] ffff88011eb03e30 ffffffff810647cd ffff8800ca0bc800 ffff8800ce29f040 Apr 18 10:36:13 haswell kernel: [ 999.922105] ffff8800ca4ff3c0 ffff8800ca0bc840 0000000000004a30 ffff88011eb03e40 Apr 18 10:36:13 haswell kernel: [ 999.931378] Call Trace: Apr 18 10:36:13 haswell kernel: [ 999.935215] <IRQ> [<ffffffff8164f753>] dump_stack+0x45/0x56 Apr 18 10:36:13 haswell kernel: [ 999.942436] [<ffffffff810647cd>] warn_slowpath_common+0x7d/0xa0 Apr 18 10:36:13 haswell kernel: [ 999.949915] [<ffffffff810648aa>] warn_slowpath_null+0x1a/0x20 Apr 18 10:36:13 haswell kernel: [ 999.957098] [<ffffffff811320dc>] perf_swevent_add+0x14c/0x190 Apr 18 10:36:13 haswell kernel: [ 999.964273] [<ffffffff81136640>] event_sched_in.isra.76+0x90/0x1e0 Apr 18 10:36:13 haswell kernel: [ 999.971863] [<ffffffff811367f9>] group_sched_in+0x69/0x1e0 Apr 18 10:36:13 haswell kernel: [ 999.978608] [<ffffffff81136e45>] __perf_event_enable+0x255/0x260 Apr 18 10:36:13 haswell kernel: [ 999.985998] [<ffffffff81132340>] remote_function+0x40/0x50 Apr 18 10:36:13 haswell kernel: [ 999.992805] [<ffffffff810de8fd>] generic_smp_call_function_single_interrupt+0x5d/0x100 Apr 18 10:36:13 haswell kernel: [ 1000.002312] [<ffffffff810421dd>] smp_trace_call_function_single_interrupt+0x2d/0xb0 Apr 18 10:36:13 haswell kernel: [ 1000.011260] [<ffffffff81661c9d>] trace_call_function_single_interrupt+0x6d/0x80 Apr 18 10:36:13 haswell kernel: [ 1000.020035] <EOI> [<ffffffff810b1c26>] ? lock_acquire+0xb6/0x120 Apr 18 10:36:13 haswell kernel: [ 1000.027489] [<ffffffff81139b4b>] ? __perf_sw_event+0x6b/0x230 Apr 18 10:36:13 haswell kernel: [ 1000.034488] [<ffffffff81139bcf>] __perf_sw_event+0xef/0x230 Apr 18 10:36:13 haswell kernel: [ 1000.041203] [<ffffffff81139b4b>] ? __perf_sw_event+0x6b/0x230 Apr 18 10:36:13 haswell kernel: [ 1000.048190] [<ffffffff810b139d>] ? __lock_acquire.isra.29+0x3bd/0xb90 Apr 18 10:36:13 haswell kernel: [ 1000.055836] [<ffffffff8165b2ce>] __do_page_fault+0x21e/0x530 Apr 18 10:36:13 haswell kernel: [ 1000.062586] [<ffffffff813cdd6f>] ? debug_check_no_obj_freed+0x19f/0x360 Apr 18 10:36:13 haswell kernel: [ 1000.070501] [<ffffffff81149ca2>] ? free_pages_prepare+0x1b2/0x230 Apr 18 10:36:13 haswell kernel: [ 1000.077811] [<ffffffff8165b647>] trace_do_page_fault+0x37/0xb0 Apr 18 10:36:13 haswell kernel: [ 1000.084762] [<ffffffff81657cd8>] trace_page_fault+0x28/0x30 Apr 18 10:36:13 haswell kernel: [ 1000.091480] [<ffffffff813c12a0>] ? __put_user_4+0x20/0x30 Apr 18 10:36:13 haswell kernel: [ 1000.098045] [<ffffffff81096a3c>] ? schedule_tail+0x5c/0xb0 Apr 18 10:36:13 haswell kernel: [ 1000.104653] [<ffffffff816608cf>] ret_from_fork+0xf/0xb0 Apr 18 10:36:13 haswell kernel: [ 1000.111017] ---[ end trace b175966afd57a176 ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo 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