linux-kernel - Re: [PATCH v2] arm64: fix the doc of RANDOMIZE_MODULE_REGION

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Message-Id: <162798340286.1497797.18069753288714137637.b4-ty@kernel.org>
Date:   Tue,  3 Aug 2021 11:05:20 +0100
From:   Will Deacon <will@...nel.org>
To:     linux-arm-kernel@...ts.infradead.org,
        Barry Song <song.bao.hua@...ilicon.com>,
        catalin.marinas@....com
Cc:     kernel-team@...roid.com, Will Deacon <will@...nel.org>,
        linux@...ck-us.net, tyhicks@...ux.microsoft.com,
        Qi Liu <liuqi115@...wei.com>, linuxarm@...wei.com,
        maz@...nel.org, Ard Biesheuvel <ard.biesheuvel@....com>,
        tabba@...gle.com, Masami Hiramatsu <mhiramat@...nel.org>,
        lecopzer.chen@...iatek.com, mark.rutland@....com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] arm64: fix the doc of RANDOMIZE_MODULE_REGION_FULL

On Sat, 31 Jul 2021 00:51:31 +1200, Barry Song wrote:
> Obviously kaslr is setting the module region to 2GB rather than 4GB since
> commit b2eed9b588112 ("arm64/kernel: kaslr: reduce module randomization
> range to 2 GB"). So fix the size of region in Kconfig.
> On the other hand, even though RANDOMIZE_MODULE_REGION_FULL is not set,
> module_alloc() can fall back to a 2GB window if ARM64_MODULE_PLTS is set.
> In this case, veneers are still needed. !RANDOMIZE_MODULE_REGION_FULL
> doesn't necessarily mean veneers are not needed.
> So fix the doc to be more precise to avoid any confusion to the readers
> of the code.

Applied to arm64 (for-next/fixes), thanks!

[1/1] arm64: fix the doc of RANDOMIZE_MODULE_REGION_FULL
      https://git.kernel.org/arm64/c/f9c4ff2ab9fe

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev