github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-11-07 06:17:02 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

cpufreq: intel_pstate: cancel HWP notify work in driver cleanup

Browse Source 
intel_pstate_driver_cleanup() frees per-CPU data without cancelling the
pending HWP notify delayed work. If hwp_notify_work is still scheduled
or running when the struct is freed, the work function accesses freed
memory via container_of().

Call intel_pstate_disable_hwp_interrupt() before kfree() to disable
the interrupt source and cancel the pending work, matching the pattern
used in intel_pstate_suspend() and intel_pstate_hwp_offline().

Fixes: d845cd901b ("cpufreq: intel_pstate: Support highest performance change interrupt")
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Tristan Madani <tristan@talencesecurity.com>
[ rjw: Fixed the Fixes: tag ]
Link: https://patch.msgid.link/20261019222635.1741146-1-tristmd@gmail.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Tristan Madani 2026-10-19 22:26:35 +00:00 committed by Rafael J. Wysocki
parent 7be4bc52fd
commit 0ffc7534a2
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/cpufreq/intel_pstate.c
View File

@ -3436,6 +3436,8 @@ static void intel_pstate_driver_cleanup(void)
if (intel_pstate_driver == &intel_pstate)
intel_pstate_clear_update_util_hook(cpu);
intel_pstate_disable_hwp_interrupt(all_cpu_data[cpu]);
kfree(all_cpu_data[cpu]);
WRITE_ONCE(all_cpu_data[cpu], NULL);
}