Date: Thu, 11 Jan 2018 11:06:56 -0600 (CST)
From: Christopher Lameter <cl@linux.com>
To: Kees Cook <keescook@chromium.org>
cc: linux-kernel@vger.kernel.org,
        Linus Torvalds <torvalds@linux-foundation.org>,
        David Windsor <dave@nullcore.net>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        Andrew Morton <akpm@linux-foundation.org>,
        Andy Lutomirski <luto@kernel.org>,
        Christoph Hellwig <hch@infradead.org>,
        "David S. Miller" <davem@davemloft.net>,
        Laura Abbott <labbott@redhat.com>,
        Mark Rutland <mark.rutland@arm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        Christoffer Dall <christoffer.dall@linaro.org>,
        Dave Kleikamp <dave.kleikamp@oracle.com>,
        Jan Kara <jack@suse.cz>,
        Luis de Bethencourt <luisbg@kernel.org>,
        Marc Zyngier <marc.zyngier@arm.com>,
        Rik van Riel <riel@redhat.com>,
        Matthew Garrett <mjg59@google.com>,
        linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org,
        netdev@vger.kernel.org, linux-mm@kvack.org,
        kernel-hardening@lists.openwall.com
Subject: Re: [PATCH 02/38] usercopy: Enhance and rename report_usercopy()
In-Reply-To: <1515636190-24061-3-git-send-email-keescook@chromium.org>
Message-ID: <alpine.DEB.2.20.1801111101420.6443@nuc-kabylake>
References: <1515636190-24061-1-git-send-email-keescook@chromium.org> <1515636190-24061-3-git-send-email-keescook@chromium.org>
User-Agent: Alpine 2.20 (DEB 67 2015-01-07)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org

On Wed, 10 Jan 2018, Kees Cook wrote:

> diff --git a/mm/slab.h b/mm/slab.h
> index ad657ffa44e5..7d29e69ac310 100644
> --- a/mm/slab.h
> +++ b/mm/slab.h
> @@ -526,4 +526,10 @@ static inline int cache_random_seq_create(struct kmem_cache *cachep,
>  static inline void cache_random_seq_destroy(struct kmem_cache *cachep) { }
>  #endif /* CONFIG_SLAB_FREELIST_RANDOM */
>
> +#ifdef CONFIG_HARDENED_USERCOPY
> +void __noreturn usercopy_abort(const char *name, const char *detail,
> +			       bool to_user, unsigned long offset,
> +			       unsigned long len);
> +#endif
> +
>  #endif /* MM_SLAB_H */

This code has nothing to do with slab allocation. Move it into
include/linux/uaccess.h where the other user space access definitions are?