perf_remove_from_context() hang

Found by

perf_fuzzer

Severity

Hang

First Seen

3.19-rc6

Most recently Seen

3.19-rc6

Reproducible

?

Found On

haswell

Linux-kernel

28 January 2015 -- [RFC][PATCH 2/3] perf: Add a bit of paranoia

Fixed in

4.0 a83fe28e2e45392464858a96745db26ac73670c8

Kernel Splat

  1. [162118.235829] ------------[ cut here ]------------
    [162118.241388] WARNING: CPU: 5 PID: 13571 at kernel/events/core.c:1644 perf_remove_from_context+0xf5/0x120()
    [162118.252183] Modules linked in: fuse x86_pkg_temp_thermal intel_powerclamp intel_rapl iosf_mbi coretemp kvm crct10dif_pclmul snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic crc32_pclmul snd_hda_intel ghash_clmulni_intel snd_hda_controller aesni_intel snd_hda_codec aes_x86_64 snd_hwdep lrw gf128mul snd_pcm ppdev glue_helper xhci_pci mei_me iTCO_wdt iTCO_vendor_support i915 snd_timer drm_kms_helper snd drm ablk_helper lpc_ich mfd_core evdev pcspkr parport_pc psmouse cryptd soundcore i2c_i801 serio_raw parport xhci_hcd mei wmi tpm_tis tpm video battery button processor i2c_algo_bit sg sr_mod sd_mod cdrom ahci libahci e1000e ehci_pci libata ptp ehci_hcd crc32c_intel usbcore scsi_mod usb_common pps_core thermal fan thermal_sys
    [162118.325574] CPU: 5 PID: 13571 Comm: perf_fuzzer Tainted: G        W 3.19.0-rc6+ #126
    [162118.334984] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014
    [162118.343581]  ffffffff81a3f194 ffff8800c8463b48 ffffffff816b6761 0000000000000000
    [162118.352277]  0000000000000000 ffff8800c8463b88 ffffffff8106dcda ffff8800c9286c40
    [162118.360962]  ffff8800c8c01800 ffff8800c8c3a090 ffff8800c8c3a090 ffff8800c71b4800
    [162118.369669] Call Trace:
    [162118.372984]  [] dump_stack+0x45/0x57
    [162118.379170]  [] warn_slowpath_common+0x8a/0xc0
    [162118.386267]  [] warn_slowpath_null+0x1a/0x20
    [162118.393160]  [] perf_remove_from_context+0xf5/0x120
    [162118.400706]  [] put_event+0x115/0x170
    [162118.407004]  [] ? put_event+0x51/0x170
    [162118.413340]  [] ? mutex_unlock+0xe/0x10
    [162118.419792]  [] perf_release+0x15/0x20
    [162118.426144]  [] __fput+0xdf/0x1f0
    [162118.432009]  [] ____fput+0xe/0x10
    [162118.437895]  [] task_work_run+0xa7/0xe0
    [162118.444377]  [] do_exit+0x319/0xac0
    [162118.450443]  [] ? get_signal+0xe9/0x770
    [162118.456906]  [] ? get_signal+0x359/0x770
    [162118.463427]  [] do_group_exit+0x54/0xe0
    [162118.469887]  [] get_signal+0x296/0x770
    [162118.476237]  [] ? __do_page_fault+0x1f2/0x580
    [162118.483251]  [] do_signal+0x28/0xbb0
    [162118.489392]  [] ? do_page_fault+0x22/0x30
    [162118.496055]  [] do_notify_resume+0x70/0x90
    [162118.502811]  [] retint_signal+0x48/0x86
    [162118.509272] ---[ end trace 55752a03ec8ab978 ]---
    
    

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