From: Peng Ma <andypma@tencent.com> stable inclusion from stable-v6.6.36 commit 448efb7ea0bfa2c4e27c5a2eb5684fd225cd12cd category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IACQP5 CVE: CVE-2024-40997 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit cea04f3d9aeebda9d9c063c0dfa71e739c322c81 ] The cpudata memory from kzalloc() in amd_pstate_epp_cpu_init() is not freed in the analogous exit function, so fix that. Signed-off-by: Peng Ma <andypma@tencent.com> Acked-by: Mario Limonciello <mario.limonciello@amd.com> Reviewed-by: Perry Yuan <Perry.Yuan@amd.com> [ rjw: Subject and changelog edits ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com> --- drivers/cpufreq/amd-pstate.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 07f341995439..3efc2aef31ce 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -1216,6 +1216,13 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy) static int amd_pstate_epp_cpu_exit(struct cpufreq_policy *policy) { + struct amd_cpudata *cpudata = policy->driver_data; + + if (cpudata) { + kfree(cpudata); + policy->driver_data = NULL; + } + pr_debug("CPU %d exiting\n", policy->cpu); return 0; } -- 2.34.1