From: Guangshuo Li <lgs201920130244@gmail.com> mainline inclusion from mainline-v7.0-rc7 commit 6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/14886 CVE: CVE-2026-43328 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- When kobject_init_and_add() fails, cpufreq_dbs_governor_init() calls kobject_put(&dbs_data->attr_set.kobj). The kobject release callback cpufreq_dbs_data_release() calls gov->exit(dbs_data) and kfree(dbs_data), but the current error path then calls gov->exit(dbs_data) and kfree(dbs_data) again, causing a double free. Keep the direct kfree(dbs_data) for the gov->init() failure path, but after kobject_init_and_add() has been called, let kobject_put() handle the cleanup through cpufreq_dbs_data_release(). Fixes: 4ebe36c94aed ("cpufreq: Fix kobject memleak") Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com> Reviewed-by: Zhongqiu Han <zhongqiu.han@oss.qualcomm.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: All applicable <stable@vger.kernel.org> Link: https://patch.msgid.link/20260401024535.1395801-1-lgs201920130244@gmail.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Xinyu Zheng <zhengxinyu6@huawei.com> --- drivers/cpufreq/cpufreq_governor.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index 3de5a2ca903e..76f3fe790f1f 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -468,13 +468,13 @@ int cpufreq_dbs_governor_init(struct cpufreq_policy *policy) /* Failure, so roll back. */ pr_err("initialization failed (dbs_data kobject init error %d)\n", ret); - kobject_put(&dbs_data->attr_set.kobj); - policy->governor_data = NULL; if (!have_governor_per_policy()) gov->gdbs_data = NULL; - gov->exit(dbs_data); + + kobject_put(&dbs_data->attr_set.kobj); + goto free_policy_dbs_info; free_dbs_data: kfree(dbs_data); -- 2.34.1