On Sun, Apr 28, 2019 at 09:40:00AM +1000, Tobin C. Harding wrote:
> Currently error return from kobject_init_and_add() is not followed by a
> call to kobject_put(). This means there is a memory leak.
>
> Add call to kobject_put() in error path of kobject_init_and_add().
>
> Signed-off-by: Tobin C. Harding <tobin@xxxxxxxxxx>
> ---
> mm/slub.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/mm/slub.c b/mm/slub.c
> index d30ede89f4a6..84a9d6c06c27 100644
> --- a/mm/slub.c
> +++ b/mm/slub.c
> @@ -5756,8 +5756,10 @@ static int sysfs_slab_add(struct kmem_cache *s)
>
> s->kobj.kset = kset;
> err = kobject_init_and_add(&s->kobj, &slab_ktype, NULL, "%s", name);
> - if (err)
> + if (err) {
> + kobject_put(&s->kobj);
> goto out;
> + }
>
> err = sysfs_create_group(&s->kobj, &slab_attr_group);
> if (err)
> --
> 2.21.0
>
This patch is not _completely_ correct. Please do not consider for
merge. There are a bunch of these on various LKML lists, once the
confusion has cleared I'll re-spin v2.
thanks,
Tobin.
