From: Mark Salyzyn <salyzyn@android.com>
To: Will Deacon <will.deacon@arm.com>, Kees Cook <keescook@chromium.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
LKML <linux-kernel@vger.kernel.org>,
kevin.brodsky@arm.com, Ingo Molnar <mingo@kernel.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
James Morse <james.morse@arm.com>,
Peter Zijlstra <peterz@infradead.org>,
Dave Martin <Dave.Martin@arm.com>,
credmonster@gmail.com, zijun_hu <zijun_hu@htc.com>,
Mark Rutland <mark.rutland@arm.com>,
Jisheng Zhang <jszhang@marvell.com>,
Laura Abbott <labbott@redhat.com>,
John Stultz <john.stultz@linaro.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
AKASHI Takahiro <takahiro.akashi@linaro.org>,
Michal Marek <mmarek@suse.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>
Subject: Re: [PATCH v3 0/3] arm64: Add CONFIG_KUSER_HELPERS
Date: Tue, 31 Oct 2017 11:42:39 -0700 [thread overview]
Message-ID: <065fd365-4635-ddc7-b683-59a5cb16be8f@android.com> (raw)
In-Reply-To: <20170920091555.GA3782@arm.com>
On 09/20/2017 02:15 AM, Will Deacon wrote:
> On Tue, Sep 19, 2017 at 03:02:22PM -0700, Kees Cook wrote:
>> On Mon, Sep 11, 2017 at 8:26 AM, Mark Salyzyn <salyzyn@android.com> wrote:
>>> Make it possible to disable the kuser helpers by adding a KUSER_HELPERS
>>> config option (enabled by default). When disabled, all kuser
>>> helpers-related code is removed from the kernel and no mapping is done
>>> at the fixed high address (0xffff0000); any attempt to use a kuser
>>> helper from a 32-bit process will result in a segfault.
>>>
>>> Signed-off-by: Mark Salyzyn <salyzyn@android.com>
>>>
>>> v2:
>>> - vectors_page and compat_vdso_spec as array of 2
>>> - free sigpage if vectors allocation failed
>>> - adjust makefile so one line for each of the assembler source modules
>>> - split off assembler changes to a new previous patch in series to reduce churn
>>> - modify slightly the feature documentation to reduce its reach
>>> - modify slightly the feature documentation to rationalize the yes default.
>>> - There are more ifdefs as a result of the rebase.
>>>
>>> v3:
>>> - rebase (minor conflicts)
>> This looks great to me. I'd love to see kuser helpers gone. :)
>>
>> Catalin, Will, does this need anything else?
> I haven't had chance to look at the patches yet (buried in other stuff), but
> I aim to get to it in the next couple of weeks.
>
> Will
Ping?
prev parent reply other threads:[~2017-10-31 18:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-11 15:26 [PATCH v3 0/3] arm64: Add CONFIG_KUSER_HELPERS Mark Salyzyn
2017-09-19 22:02 ` Kees Cook
2017-09-20 9:15 ` Will Deacon
2017-10-31 18:42 ` Mark Salyzyn [this message]
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