The reference count of the device incremented in device_initialize() is not decremented when device_add() fails. Add a put_device() and delete kfree() 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 make24@iscas.ac.cn --- drivers/scsi/raid_class.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/raid_class.c b/drivers/scsi/raid_class.c index 898a0bdf8df6..77c91dbf3b77 100644 --- a/drivers/scsi/raid_class.c +++ b/drivers/scsi/raid_class.c @@ -251,7 +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); - kfree(rc); + put_device(&rc->dev); return err; } EXPORT_SYMBOL(raid_component_add);