[PATCH AUTOSEL 5.7 256/274] cpuidle: Fix three reference count leaks

Sasha Levin
2020-06-09T00:46:00Z

From: Qiushi Wu <wu000273@umn.edu>

[ Upstream commit c343bf1ba5efcbf2266a1fe3baefec9cc82f867f ]

kobject_init_and_add() takes reference even when it fails.
If this function returns an error, kobject_put() must be called to
properly clean up the memory associated with the object.

Previous commit "b8eb718348b8" fixed a similar problem.

Signed-off-by: Qiushi Wu <wu000273@umn.edu>
[ rjw: Subject ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/cpuidle/sysfs.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
index cdeedbf02646..55107565b319 100644
--- a/drivers/cpuidle/sysfs.c
+++ b/drivers/cpuidle/sysfs.c
@@ -515,7 +515,7 @@ static int cpuidle_add_state_sysfs(struct cpuidle_device *device)
ret = kobject_init_and_add(&kobj->kobj, &ktype_state_cpuidle,
&kdev->kobj, "state%d", i);
if (ret) {
- kfree(kobj);
+ kobject_put(&kobj->kobj);
goto error_state;
}
cpuidle_add_s2idle_attr_group(kobj);
@@ -646,7 +646,7 @@ static int cpuidle_add_driver_sysfs(struct cpuidle_device *dev)
ret = kobject_init_and_add(&kdrv->kobj, &ktype_driver_cpuidle,
&kdev->kobj, "driver");
if (ret) {
- kfree(kdrv);
+ kobject_put(&kdrv->kobj);
return ret;
}

@@ -740,7 +740,7 @@ int cpuidle_add_sysfs(struct cpuidle_device *dev)
error = kobject_init_and_add(&kdev->kobj, &ktype_cpuidle, &cpu_dev->kobj,
"cpuidle");
if (error) {
- kfree(kdev);
+ kobject_put(&kdev->kobj);
return error;
}

--
2.25.1