linux-kernel - Re: [PATCH] powerpc: Mark .opd section read-only

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Message-Id: <163584789099.1845480.12874546703415674660.b4-ty@ellerman.id.au>
Date:   Tue, 02 Nov 2021 21:11:30 +1100
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] powerpc: Mark .opd section read-only

On Wed, 13 Oct 2021 16:43:54 +0200, Christophe Leroy wrote:
> .opd section contains function descriptors used to locate
> functions in the kernel. If someone is able to modify a
> function descriptor he will be able to run arbitrary
> kernel function instead of another.
> 
> To avoid that, move .opd section inside read-only memory.
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc: Mark .opd section read-only
      https://git.kernel.org/powerpc/c/3091f5fc5f1df7741ddf326561384e0997eca2a1

cheers