Re: [Linux Kernel Bug] memory leak in ubi_attach

[syzbot <syzbot+3a0f6c96e37e347c6ba9@syzkaller.appspotmail.com>]

> #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git<http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git> 8cf0b93919e13d1e8d4466eb4080a4c4d9d66d7b

This crash does not have a reproducer. I cannot test it.

>
> ----------------------------------------------------------------------------------
> diff --git a/mm/slub.c b/mm/slub.c
> index 5b832512044e..dc77128358d8 100644
> --- a/mm/slub.c
> +++ b/mm/slub.c
> @@ -7098,8 +7098,11 @@ 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) {
> +       kfree_const(s->kobj.name);
> +       s->kobj.name = NULL;
>         goto out;
> +   }
>
>     err = sysfs_create_group(&s->kobj, &slab_attr_group);
>     if (err)
> --
> 2.42.0
>
> ----------------------------------------------------------------------------------
>
> Thanks & regards,
> Sudhir
>