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Message-ID: <CAGXu5jJhnTDDhun6U9rV8H9YzuiTcqSD035Uvdv3MXB+S-LtsA@mail.gmail.com>
Date: Sat, 9 Jul 2016 10:07:34 -0700
From: Kees Cook <keescook@...omium.org>
To: Valdis Kletnieks <Valdis.Kletnieks@...edu>
Cc: "kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>, Christoph Lameter <cl@...ux.com>,
Jan Kara <jack@...e.cz>, Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>, Linux-MM <linux-mm@...ck.org>,
sparclinux <sparclinux@...r.kernel.org>, linux-ia64@...r.kernel.org,
Andrea Arcangeli <aarcange@...hat.com>, linux-arch <linux-arch@...r.kernel.org>,
"x86@...nel.org" <x86@...nel.org>, Russell King <linux@...linux.org.uk>, PaX Team <pageexec@...email.hu>,
Borislav Petkov <bp@...e.de>, Mathias Krause <minipli@...glemail.com>, Fenghua Yu <fenghua.yu@...el.com>,
Rik van Riel <riel@...hat.com>, David Rientjes <rientjes@...gle.com>, Tony Luck <tony.luck@...el.com>,
Andy Lutomirski <luto@...nel.org>, Joonsoo Kim <iamjoonsoo.kim@....com>,
Dmitry Vyukov <dvyukov@...gle.com>, Laura Abbott <labbott@...oraproject.org>,
Brad Spengler <spender@...ecurity.net>, Ard Biesheuvel <ard.biesheuvel@...aro.org>,
LKML <linux-kernel@...r.kernel.org>, Pekka Enberg <penberg@...nel.org>,
Case y Sc hauf ler <casey@...aufler-ca.com>, Andrew Morton <akpm@...ux-foundation.org>,
"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>, "David S. Miller" <davem@...emloft.net>,
"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>
Subject: Re: Re: [PATCH 9/9] mm: SLUB hardened usercopy support
On Fri, Jul 8, 2016 at 11:17 PM, <Valdis.Kletnieks@...edu> wrote:
> Yeah, 'ping' dies with a similar traceback going to rawv6_setsockopt(),
> and 'trinity' dies a horrid death during initialization because it creates
> some sctp sockets to fool around with. The problem in all these cases is that
> setsockopt uses copy_from_user() to pull in the option value, and the allocation
> isn't tagged with USERCOPY to whitelist it.
Just a note to clear up confusion: this series doesn't include the
whitelist protection, so this appears to be either bugs in the slub
checker or bugs in the code using the cfq_io_cq cache. I suspect the
former. :)
-Kees
--
Kees Cook
Chrome OS & Brillo Security
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