diff options
| author | Yang Yingliang <yangyingliang@huawei.com> | 2023-01-03 20:57:26 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-10 09:32:56 +0100 |
| commit | 7d8914c998d6152c8f7c9fdf32b6c7327a9fd2a7 (patch) | |
| tree | a3a479e5c84d3a807f610978089d47ad63c62f59 /drivers/powercap | |
| parent | 4d497e8b200a175094e0ac252ed878add39b8771 (diff) | |
| download | linux-7d8914c998d6152c8f7c9fdf32b6c7327a9fd2a7.tar.gz | |
powercap: fix possible name leak in powercap_register_zone()
[ Upstream commit 1b6599f741a4525ca761ecde46e5885ff1e6ba58 ]
In the error path after calling dev_set_name(), the device
name is leaked. To fix this, calling dev_set_name() before
device_register(), and call put_device() if it returns error.
All the resources is released in powercap_release(), so it
can return from powercap_register_zone() directly.
Fixes: 75d2364ea0ca ("PowerCap: Add class driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/powercap')
| -rw-r--r-- | drivers/powercap/powercap_sys.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/powercap/powercap_sys.c b/drivers/powercap/powercap_sys.c index f0654a932b37..ff736b006198 100644 --- a/drivers/powercap/powercap_sys.c +++ b/drivers/powercap/powercap_sys.c @@ -529,9 +529,6 @@ struct powercap_zone *powercap_register_zone( power_zone->name = kstrdup(name, GFP_KERNEL); if (!power_zone->name) goto err_name_alloc; - dev_set_name(&power_zone->dev, "%s:%x", - dev_name(power_zone->dev.parent), - power_zone->id); power_zone->constraints = kcalloc(nr_constraints, sizeof(*power_zone->constraints), GFP_KERNEL); @@ -554,9 +551,16 @@ struct powercap_zone *powercap_register_zone( power_zone->dev_attr_groups[0] = &power_zone->dev_zone_attr_group; power_zone->dev_attr_groups[1] = NULL; power_zone->dev.groups = power_zone->dev_attr_groups; + dev_set_name(&power_zone->dev, "%s:%x", + dev_name(power_zone->dev.parent), + power_zone->id); result = device_register(&power_zone->dev); - if (result) - goto err_dev_ret; + if (result) { + put_device(&power_zone->dev); + mutex_unlock(&control_type->lock); + + return ERR_PTR(result); + } control_type->nr_zones++; mutex_unlock(&control_type->lock); |