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Date: Wed, 10 Jan 2018 12:31:47 -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>,
Laura Abbott <labbott@...hat.com>, Ingo Molnar <mingo@...nel.org>,
Mark Rutland <mark.rutland@....com>, 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>,
"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>,
Luis de Bethencourt <luisbg@...nel.org>,
Marc Zyngier <marc.zyngier@....com>, Rik van Riel <riel@...hat.com>,
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 05/36] usercopy: WARN() on slab cache usercopy region
violations
On Tue, 9 Jan 2018, Kees Cook wrote:
> @@ -3823,11 +3825,9 @@ int __check_heap_object(const void *ptr, unsigned long n, struct page *page,
Could we do the check in mm_slab_common.c for all allocators and just have
a small function in each allocators that give you the metadata needed for
the object?
> + * carefully audit the whitelist range).
> + */
> int report_usercopy(const char *name, const char *detail, bool to_user,
> unsigned long offset, unsigned long len)
> {
Should this not be added earlier?
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