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Date: Wed, 10 Jan 2018 12:28:23 -0600 (CST)
From: Christopher Lameter <cl@...ux.com>
To: Kees Cook <keescook@...omium.org>
cc: linux-kernel@...r.kernel.org, David Windsor <dave@...lcore.net>,
Pekka Enberg <penberg@...nel.org>, David Rientjes <rientjes@...gle.com>,
Joonsoo Kim <iamjoonsoo.kim@....com>,
Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
linux-xfs@...r.kernel.org, Linus Torvalds <torvalds@...ux-foundation.org>,
Alexander Viro <viro@...iv.linux.org.uk>,
Andy Lutomirski <luto@...nel.org>, Christoph Hellwig <hch@...radead.org>,
"David S. Miller" <davem@...emloft.net>, Laura Abbott <labbott@...hat.com>,
Mark Rutland <mark.rutland@....com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Christian Borntraeger <borntraeger@...ibm.com>,
Christoffer Dall <christoffer.dall@...aro.org>,
Dave Kleikamp <dave.kleikamp@...cle.com>, Jan Kara <jack@...e.cz>,
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Matthew Garrett <mjg59@...gle.com>, linux-fsdevel@...r.kernel.org,
linux-arch@...r.kernel.org, netdev@...r.kernel.org,
kernel-hardening@...ts.openwall.com
Subject: Re: [PATCH 04/36] usercopy: Prepare for usercopy whitelisting
On Tue, 9 Jan 2018, Kees Cook wrote:
> +struct kmem_cache *kmem_cache_create_usercopy(const char *name,
> + size_t size, size_t align, slab_flags_t flags,
> + size_t useroffset, size_t usersize,
> + void (*ctor)(void *));
Hmmm... At some point we should switch kmem_cache_create to pass a struct
containing all the parameters. Otherwise the API will blow up with
additional functions.
> index 2181719fd907..70c4b4bb4d1f 100644
> --- a/include/linux/stddef.h
> +++ b/include/linux/stddef.h
> @@ -19,6 +19,8 @@ enum {
> #define offsetof(TYPE, MEMBER) ((size_t)&((TYPE *)0)->MEMBER)
> #endif
>
> +#define sizeof_field(structure, field) sizeof((((structure *)0)->field))
> +
> /**
> * offsetofend(TYPE, MEMBER)
> *
Have a separate patch for adding this functionality? Its not a slab
maintainer
file.
Rest looks ok.
Acked-by: Christoph Lameter <cl@...ux.com>
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