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([2001:41d0:303:db6b::]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48e1d818c59sm1784977f8f.30.2026.10.19.15.26.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Oct 2026 15:26:35 -0700 (PDT) From: Tristan Madani To: Len Brown , "Rafael J . Wysocki" Cc: Srinivas Pandruvada , Viresh Kumar , linux-pm@vger.kernel.org, stable@vger.kernel.org, Tristan Madani Subject: [PATCH] cpufreq: intel_pstate: cancel HWP notify work in driver cleanup Date: Mon, 19 Oct 2026 22:26:35 +0000 Message-ID: <20261019222635.1741146-1-tristmd@gmail.com> X-Mailer: git-send-email 2.47.3 X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Tristan Madani 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: d0e936adfe84 ("cpufreq: intel_pstate: Add HWP_HIGHEST_PERF_CHANGE handling") Cc: stable@vger.kernel.org Signed-off-by: Tristan Madani --- drivers/cpufreq/intel_pstate.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 17158cb25dd89..0e6ae4cdda5de 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -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); } -- 2.47.3