From: Anel Orazgaliyeva <anelkz@amazon.de> stable inclusion from stable-v4.19.294 commit 22d44652b6d6404b96a40bb051d1046e6c005ae5 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I81G0T CVE: NA -------------------------------- [ Upstream commit e5f5a66c9aa9c331da5527c2e3fd9394e7091e01 ] Commit c343bf1ba5ef ("cpuidle: Fix three reference count leaks") fixes the cleanup of kobjects; however, it removes kfree() calls altogether, leading to memory leaks. Fix those and also defer the initialization of dev->kobj_dev until after the error check, so that we do not end up with a dangling pointer. Fixes: c343bf1ba5ef ("cpuidle: Fix three reference count leaks") Signed-off-by: Anel Orazgaliyeva <anelkz@amazon.de> Suggested-by: Aman Priyadarshi <apeureka@amazon.de> [ rjw: Subject edits ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Xia Fukun <xiafukun@huawei.com> --- drivers/cpuidle/sysfs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c index 38986a36197e..76fcd45eadb5 100644 --- a/drivers/cpuidle/sysfs.c +++ b/drivers/cpuidle/sysfs.c @@ -481,6 +481,7 @@ static int cpuidle_add_state_sysfs(struct cpuidle_device *device) &kdev->kobj, "state%d", i); if (ret) { kobject_put(&kobj->kobj); + kfree(kobj); goto error_state; } cpuidle_add_s2idle_attr_group(kobj); @@ -612,6 +613,7 @@ static int cpuidle_add_driver_sysfs(struct cpuidle_device *dev) &kdev->kobj, "driver"); if (ret) { kobject_put(&kdrv->kobj); + kfree(kdrv); return ret; } @@ -698,7 +700,6 @@ int cpuidle_add_sysfs(struct cpuidle_device *dev) if (!kdev) return -ENOMEM; kdev->dev = dev; - dev->kobj_dev = kdev; init_completion(&kdev->kobj_unregister); @@ -706,9 +707,11 @@ int cpuidle_add_sysfs(struct cpuidle_device *dev) "cpuidle"); if (error) { kobject_put(&kdev->kobj); + kfree(kdev); return error; } + dev->kobj_dev = kdev; kobject_uevent(&kdev->kobj, KOBJ_ADD); return 0; -- 2.34.1