linux-kernel - Re: [PATCH 3/3] kallsyms: Unexport kallsyms_lookup_name() and kallsyms_on_each

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Message-ID: <20200221115303.GB116368@kroah.com>
Date:   Fri, 21 Feb 2020 12:53:03 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Will Deacon <will@...nel.org>
Cc:     linux-kernel@...r.kernel.org, kernel-team@...roid.com,
        akpm@...ux-foundation.org,
        "K . Prasad" <prasad@...ux.vnet.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Frederic Weisbecker <frederic@...nel.org>,
        Christoph Hellwig <hch@....de>,
        Quentin Perret <qperret@...gle.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>
Subject: Re: [PATCH 3/3] kallsyms: Unexport kallsyms_lookup_name() and
 kallsyms_on_each_symbol()

On Fri, Feb 21, 2020 at 11:44:04AM +0000, Will Deacon wrote:
> kallsyms_lookup_name() and kallsyms_on_each_symbol() are exported to
> modules despite having no in-tree users and being wide open to abuse by
> out-of-tree modules that can use them as a method to invoke arbitrary
> non-exported kernel functions.
> 
> Unexport kallsyms_lookup_name() and kallsyms_on_each_symbol().
> 
> Cc: Alexei Starovoitov <ast@...nel.org>
> Cc: Masami Hiramatsu <mhiramat@...nel.org>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Christoph Hellwig <hch@....de>
> Cc: Quentin Perret <qperret@...gle.com>
> Signed-off-by: Will Deacon <will@...nel.org>

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>