linux-kernel - Re: [PATCH v7 2/2] ARM: ftrace: Add MODULE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 10 Mar 2021 18:17:54 +0100
From:   Alexander Sverdlin <alexander.sverdlin@...ia.com>
To:     Florian Fainelli <f.fainelli@...il.com>,
        Qais Yousef <qais.yousef@....com>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: Re: [PATCH v7 2/2] ARM: ftrace: Add MODULE_PLTS support

Hi!

On 10/03/2021 17:14, Florian Fainelli wrote:
>>>>> I tried on 5.12-rc2 and 5.11 but couldn't reproduce the problem using your
>>> I still can't reproduce on 5.12-rc2.
>>>
>>> I do have CONFIG_ARM_MODULE_PLTS=y. Do you need to do something else after
>>> loading the module? I tried starting ftrace, but maybe there's a particular
>>> combination required?
>> You need to load a BIG module, so big that it has no place in the modules area
>> any more and goes to vmalloc area.
> You absolutely need a very big module maybe more than one. When I tested
> this, I could use the two proprietary modules (*sigh*) that I needed to
> exercise against and loading one but not the other was not enough to
> make the second module loading spill into vmalloc space.

Here is what I use instead of these real world "proprietary" modules (which of course
were the real trigger for the patch):

https://www.spinics.net/lists/arm-kernel/msg878599.html

-- 
Best regards,
Alexander Sverdlin.