[PATCH] ACPI: power: Use put_device() in power resource add error path

[Guangshuo Li]

After device_initialize(), the lifetime of struct device is managed by
the driver core through reference counting.

acpi_add_power_resource() initializes device->dev via
acpi_init_device_object(), which installs acpi_release_power_resource()
as the release callback. If acpi_device_add() fails, however, the error
path calls acpi_release_power_resource() directly instead of dropping
the device reference with put_device().

This bypasses the normal device lifetime rules and frees the object
without releasing the reference acquired by device_initialize(), which
may lead to a refcount leak and potentially a use-after-free. Fix it by
calling put_device(&device->dev) and let the release callback handle
the final cleanup.

Fixes: 781d737c7466 ("ACPI: Drop power resources driver")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Guangshuo Li <lgs201920130244@xxxxxxxxx>
---
 drivers/acpi/power.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 361a7721a6a8..f96f954876a7 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -991,7 +991,7 @@ struct acpi_device *acpi_add_power_resource(acpi_handle handle)
 	return device;
 
  err:
-	acpi_release_power_resource(&device->dev);
+	put_device(&device->dev);
 	return NULL;
 }
 
-- 
2.43.0