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SubjectRe: [PATCH v3] retpoline: Add retpoline tag to VERMAGIC
On Tue, Jan 16, 2018 at 12:52:28PM -0800, Andi Kleen wrote:
> From: Andi Kleen <ak@linux.intel.com>
>
> Add a marker for retpoline to the module VERMAGIC. This catches
> the case when a non RETPOLINE compiled module gets loaded into
> a retpoline kernel, making it insecure.
>
> It doesn't handle the case when retpoline has been runtime disabled.
> Even in this case the match of the retcompile status will be enforced.
> This implies that even with retpoline run time disabled all modules
> loaded need to be recompiled.
>
> This supersedes an earlier patch that did the same checking using
> a new module tag (so it's really a v3)
>
> Signed-off-by: Andi Kleen <ak@linux.intel.com>


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

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