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| author |   Henry Willard <henry.willard@oracle.com> | 2018-08-14 17:01:02 -0700 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-08-16 23:03:29 +0200 |
| commit | 2a3eb51e30b9ac66fe1b75877627a7e4aaeca24a (patch) | |
| tree | 82ebe04aa0d83961db2354dd77e6d9c56a589849 /drivers/cpuidle | |
| parent | Merge tag 'pm-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm (diff) | |
| download | linux-dev-2a3eb51e30b9ac66fe1b75877627a7e4aaeca24a.tar.xz linux-dev-2a3eb51e30b9ac66fe1b75877627a7e4aaeca24a.zip | |
cpufreq: governor: Avoid accessing invalid governor_data
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: e788892ba3cc (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>
Diffstat (limited to 'drivers/cpuidle')
0 files changed, 0 insertions, 0 deletions