linux-kernel - Re: [PATCH v2] scs: Release kasan vmalloc poison in scs

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Message-Id: <163299104851.1259041.949139290018170136.b4-ty@kernel.org>
Date:   Thu, 30 Sep 2021 09:53:31 +0100
From:   Will Deacon <will@...nel.org>
To:     yee.lee@...iatek.com, linux-kernel@...r.kernel.org
Cc:     catalin.marinas@....com, kernel-team@...roid.com,
        Will Deacon <will@...nel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-arm-kernel@...ts.infradead.org>, Kuan-Ying.lee@...iatek.com,
        nicholas.Tang@...iatek.com,
        Matthias Brugger <matthias.bgg@...il.com>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>, chinwen.chang@...iatek.com
Subject: Re: [PATCH v2] scs: Release kasan vmalloc poison in scs_free process

On Thu, 30 Sep 2021 16:16:13 +0800, yee.lee@...iatek.com wrote:
> From: Yee Lee <yee.lee@...iatek.com>
> 
> Since scs allocation is moved to vmalloc region, the
> shadow stack is protected by kasan_posion_vmalloc.
> However, the vfree_atomic operation needs to access
> its context for scs_free process and causes kasan error
> as the dump info below.
> 
> [...]

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

[1/1] scs: Release kasan vmalloc poison in scs_free process
      https://git.kernel.org/arm64/c/528a4ab45300

Cheers,
-- 
Will

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