Re: [PATCH] arm: don't allow CONFIG_DEBUG_SET_MODULE_RONX if CONFIG_JUMP_LABEL is enabled

[Kees Cook]

On Thu, Apr 3, 2014 at 4:48 PM, Rabin Vincent <rabin@xxxxxx> wrote:
> On Thu, Apr 03, 2014 at 04:14:54PM -0700, Kees Cook wrote:
>> On Tue, Apr 1, 2014 at 4:08 PM, Rabin Vincent <rabin@xxxxxx> wrote:
>> > Here's a patch (probably whitespace damaged, hence also attached) with
>> > which dynamic ftrace works for me on top your other paches.  Tested on
>> > a non-LPAE SMP.
>>
>> Thanks! I'll incorporate calls to set_all_modules_text_rw/ro and see
>> what I can make work.
>
> You can use the patch I posted yesterday for module support:
> http://lists.infradead.org/pipermail/linux-arm-kernel/2014-April/244558.html

Yup, that's basically what I had too.

So, even with your patch, I still get faults with ftrace.
probe_kernel_write still errors for me, and I don't see why. I will
send an updated patch series with my current CONFIG_DEBUG_RODATA work
shortly...

-Kees

-- 
Kees Cook
Chrome OS Security
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