Re: [Linux Kernel Bug] memory leak in ubi_attach

From: syzbot
Date: Fri Nov 15 2024 - 09:11:23 EST


> #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
>