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Message-ID: <CAGXu5jLEKczJF1MD7nncK6WMLXt+rm7ieWQ_MmphA=m63mbcyQ@mail.gmail.com>
Date: Wed, 8 Jun 2016 19:58:10 -0700
From: Kees Cook <keescook@...omium.org>
To: Brad Spengler <spender@...ecurity.net>
Cc: "kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>, PaX Team <pageexec@...email.hu>,
Casey Schaufler <casey.schaufler@...el.com>, Rik van Riel <riel@...hat.com>,
Christoph Lameter <cl@...ux.com>, Pekka Enberg <penberg@...nel.org>, David Rientjes <rientjes@...gle.com>,
Joonsoo Kim <iamjoonsoo.kim@....com>, Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2 1/4] mm: Hardened usercopy
On Wed, Jun 8, 2016 at 5:47 PM, Brad Spengler <spender@...ecurity.net> wrote:
>> diff --git a/mm/usercopy.c b/mm/usercopy.c
>> new file mode 100644
>> index 000000000000..e09c33070759
>> --- /dev/null
>> +++ b/mm/usercopy.c
>> @@ -0,0 +1,177 @@
>> +/*
>> + * This implements the various checks for CONFIG_HARDENED_USERCOPY*,
>> + * which are designed to protect kernel memory from needless exposure
>> + * and overwrite under many conditions.
>> + */
>
> As this is a new file being introduced which is (modulo some bikeshedding
> and addition of a few comments) a direct copy+paste of our code and comments
> in fs/exec.c, I would appreciate both a GPL notice (the same as exists for
> KASAN, etc) and both the PaX Team and myself being listed as the copyright
> owners.
Sure thing! I'll include it in the next revision. Do you have specific
text and/or date ranges you'd prefer me to use?
Thanks,
-Kees
--
Kees Cook
Chrome OS & Brillo Security
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