The reference count of the device incremented in device_initialize() is not decremented when device_add() fails. Add a put_device() call before returning from the function to decrement reference count for cleanup. Or it could cause memory leak.
As comment of device_add() says, if device_add() succeeds, you should call device_del() when you want to get rid of it. If device_add() has not succeeded, use only put_device() to drop the reference count.
Found by code review.
Cc: stable@vger.kernel.org Fixes: ed542bed126c ("[SCSI] raid class: handle component-add errors") Signed-off-by: Ma Ke make_ruc2021@163.com --- drivers/scsi/raid_class.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/scsi/raid_class.c b/drivers/scsi/raid_class.c index 898a0bdf8df6..2cb2949a78c6 100644 --- a/drivers/scsi/raid_class.c +++ b/drivers/scsi/raid_class.c @@ -251,6 +251,7 @@ int raid_component_add(struct raid_template *r,struct device *raid_dev, list_del(&rc->node); rd->component_count--; put_device(component_dev); + put_device(&rc->dev); kfree(rc); return err; }