Henry Willard 924383edf4 cpufreq: governor: Avoid accessing invalid governor_data ...

commit 2a3eb51e30 upstream.

If cppc_cpufreq.ko is deleted at the same time that tuned-adm is
changing profiles, there is a small chance that a race can occur
between cpufreq_dbs_governor_exit() and cpufreq_dbs_governor_limits()
resulting in a system failure when the latter tries to use
policy->governor_data that has been freed by the former.

This patch uses gov_dbs_data_mutex to synchronize access.

Fixes: e788892ba3 (cpufreq: governor: Get rid of governor events)
Signed-off-by: Henry Willard <henry.willard@oracle.com>
[ rjw: Subject, minor white space adjustment ]
Cc: 4.8+ <stable@vger.kernel.org> # 4.8+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-09-09 19:55:58 +02:00

..

acpi-cpufreq.c

x86/cpu: Rename cpu_data.x86_mask to cpu_data.x86_stepping

2018-02-22 15:42:24 +01:00

amd_freq_sensitivity.c

…

arm_big_little_dt.c

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arm_big_little.c

cpufreq: arm_big_little: Make ->get_transition_latency() mandatory

2017-07-26 00:15:44 +02:00

arm_big_little.h

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at32ap-cpufreq.c

…

blackfin-cpufreq.c

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bmips-cpufreq.c

cpufreq: bmips-cpufreq: CPUfreq driver for Broadcom's BMIPS SoCs

2017-02-09 01:22:44 +01:00

brcmstb-avs-cpufreq.c

cpufreq: brcmstb-avs-cpufreq: remove unnecessary platform_set_drvdata()

2017-02-09 01:22:46 +01:00

cppc_cpufreq.c

cpufreq / CPPC: Set platform specific transition_delay_us

2018-07-22 14:28:42 +02:00

cpufreq_conservative.c

cpufreq: governor: Drop min_sampling_rate

2017-07-22 02:25:20 +02:00

cpufreq_governor_attr_set.c

…

cpufreq_governor.c

cpufreq: governor: Avoid accessing invalid governor_data

2018-09-09 19:55:58 +02:00

cpufreq_governor.h

cpufreq: Replace "max_transition_latency" with "dynamic_switching"

2017-07-26 00:15:45 +02:00

cpufreq_ondemand.c

cpufreq: governor: Drop min_sampling_rate

2017-07-22 02:25:20 +02:00

cpufreq_ondemand.h

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cpufreq_performance.c

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cpufreq_powersave.c

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cpufreq_stats.c

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux

2017-07-14 13:12:32 -07:00

cpufreq_userspace.c

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cpufreq-dt-platdev.c

cpufreq: mediatek: add mediatek related projects into blacklist

2018-02-16 20:22:43 +01:00

cpufreq-dt.c

cpufreq: Process remote callbacks from any CPU if the platform permits

2017-08-01 14:24:54 +02:00

cpufreq-dt.h

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cpufreq-nforce2.c

cpufreq: Add CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING cpufreq driver flag

2017-07-26 00:15:46 +02:00

cpufreq.c

cpufreq: Fix new policy initialization during limits updates via sysfs

2018-06-26 08:06:32 +08:00

cris-artpec3-cpufreq.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

cris-etraxfs-cpufreq.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

davinci-cpufreq.c

ARM: davinci: da850: fix da850_set_pll0rate()

2017-01-02 15:02:51 +05:30

e_powersaver.c

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elanfreq.c

cpufreq: Add CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING cpufreq driver flag

2017-07-26 00:15:46 +02:00

exynos5440-cpufreq.c

cpufreq: exynos5440: Fix inconsistent indenting

2017-06-24 01:38:00 +02:00

freq_table.c

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gx-suspmod.c

cpufreq: Add CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING cpufreq driver flag

2017-07-26 00:15:46 +02:00

highbank-cpufreq.c

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ia64-acpi-cpufreq.c

cpufreq/ia64: Replace racy task affinity logic

2017-04-15 12:20:55 +02:00

imx6q-cpufreq.c

cpufreq: imx6q: Fix imx6sx low frequency support

2017-08-29 00:22:52 +02:00

intel_pstate.c

cpufreq: intel_pstate: Register when ACPI PCCH is present

2018-07-25 11:25:08 +02:00

Kconfig

cpufreq: Add Loongson machine dependencies

2018-02-03 17:39:00 +01:00

Kconfig.arm

cpufreq: dbx500: Delete obsolete driver

2017-08-22 15:50:02 +02:00

Kconfig.powerpc

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Kconfig.x86

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kirkwood-cpufreq.c

cpufreq: kirkwood-cpufreq:- Handle return value of clk_prepare_enable()

2017-05-30 00:09:41 +02:00

longhaul.c

cpufreq: longhaul: Revert transition_delay_us to 200 ms

2018-03-24 11:01:21 +01:00

longhaul.h

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longrun.c

cpufreq: Don't set transition_latency for setpolicy drivers

2017-07-26 00:15:43 +02:00

loongson1-cpufreq.c

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loongson2_cpufreq.c

cpufreq: Loongson2: constify platform_device_id

2017-08-18 01:44:21 +02:00

Makefile

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

maple-cpufreq.c

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mediatek-cpufreq.c

cpufreq: mediatek: add support of cpufreq to MT7622 SoC

2017-08-10 01:29:53 +02:00

mvebu-cpufreq.c

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omap-cpufreq.c

PM / OPP: Update OPP users to put reference

2017-01-30 09:22:21 +01:00

p4-clockmod.c

x86/cpu: Rename cpu_data.x86_mask to cpu_data.x86_stepping

2018-02-22 15:42:24 +01:00

pasemi-cpufreq.c

cpufreq/pasemi: Adjust system_state check

2017-05-23 10:01:36 +02:00

pcc-cpufreq.c

cpufreq: intel_pstate: Register when ACPI PCCH is present

2018-07-25 11:25:08 +02:00

pmac32-cpufreq.c

cpufreq: Add CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING cpufreq driver flag

2017-07-26 00:15:46 +02:00

pmac64-cpufreq.c

cpufreq: Convert to using %pOF instead of full_name

2017-08-25 01:20:46 +02:00

powernow-k6.c

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powernow-k7.c

x86/cpu: Rename cpu_data.x86_mask to cpu_data.x86_stepping

2018-02-22 15:42:24 +01:00

powernow-k7.h

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powernow-k8.c

format-security: move static strings to const

2017-05-08 17:15:14 -07:00

powernow-k8.h

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powernv-cpufreq.c

cpufreq: powernv: Fix hardlockup due to synchronous smp_call in timer interrupt

2018-05-01 12:58:24 -07:00

ppc_cbe_cpufreq_pervasive.c

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ppc_cbe_cpufreq_pmi.c

cpufreq: Remove CPUFREQ_START notifier event

2017-02-04 00:05:30 +01:00

ppc_cbe_cpufreq.c

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ppc_cbe_cpufreq.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

pxa2xx-cpufreq.c

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pxa3xx-cpufreq.c

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qoriq-cpufreq.c

thermal: cpu_cooling: use cpufreq_policy to register cooling device

2017-05-27 17:32:24 -07:00

s3c24xx-cpufreq-debugfs.c

…

s3c24xx-cpufreq.c

cpufreq: s3c24xx: Fix broken s3c_cpufreq_init()

2018-03-08 22:41:06 -08:00

s3c64xx-cpufreq.c

cpufreq: s3c64xx: remove incorrect __init annotation

2016-12-21 02:54:18 +01:00

s3c2410-cpufreq.c

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s3c2412-cpufreq.c

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s3c2416-cpufreq.c

cpufreq: s3c2416: double free on driver init error path

2017-02-09 01:22:45 +01:00

s3c2440-cpufreq.c

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s5pv210-cpufreq.c

cpufreq: s5pv210: add missing of_node_put()

2017-07-26 22:54:01 +02:00

sa1100-cpufreq.c

cpufreq: Add CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING cpufreq driver flag

2017-07-26 00:15:46 +02:00

sa1110-cpufreq.c

cpufreq: Add CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING cpufreq driver flag

2017-07-26 00:15:46 +02:00

sc520_freq.c

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scpi-cpufreq.c

cpufreq: scpi: use new scpi_ops functions to remove duplicate code

2017-06-05 11:14:35 +01:00

sfi-cpufreq.c

cpufreq: sfi: make freq_table static

2017-06-24 01:43:21 +02:00

sh-cpufreq.c

cpufreq: Add CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING cpufreq driver flag

2017-07-26 00:15:46 +02:00

sparc-us2e-cpufreq.c

cpufreq/sparc-us2e: Replace racy task affinity logic

2017-04-15 12:20:56 +02:00

sparc-us3-cpufreq.c

cpufreq/sparc-us3: Replace racy task affinity logic

2017-04-15 12:20:55 +02:00

spear-cpufreq.c

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speedstep-centrino.c

x86/cpu: Rename cpu_data.x86_mask to cpu_data.x86_stepping

2018-02-22 15:42:24 +01:00

speedstep-ich.c

cpufreq: speedstep: remove unnecessary static in speedstep_detect_chipset()

2017-07-16 02:12:35 +02:00

speedstep-lib.c

x86/cpu: Rename cpu_data.x86_mask to cpu_data.x86_stepping

2018-02-22 15:42:24 +01:00

speedstep-lib.h

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speedstep-smi.c

cpufreq: Add CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING cpufreq driver flag

2017-07-26 00:15:46 +02:00

sti-cpufreq.c

cpufreq: Convert to using %pOF instead of full_name

2017-08-25 01:20:46 +02:00

tango-cpufreq.c

cpufreq: dt: Don't use generic platdev driver for tango

2017-07-22 02:20:59 +02:00

tegra20-cpufreq.c

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tegra124-cpufreq.c

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tegra186-cpufreq.c

cpufreq: Add Tegra186 cpufreq driver

2017-04-19 23:23:08 +02:00

ti-cpufreq.c

cpufreq: ti-cpufreq: Support additional am43xx platforms

2017-09-20 00:51:01 +02:00

unicore2-cpufreq.c

cpufreq: Add CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING cpufreq driver flag

2017-07-26 00:15:46 +02:00

vexpress-spc-cpufreq.c

…