On Thu, 2018-08-16 at 12:41 -0700, Andy Lutomirski wrote:
> Currently, if the vDSO ends up containing an indirect branch or
> call, GCC will emit the "external thunk" style of retpoline, and it
> will fail to link.
>
> Fix it by building the vDSO with inline retpoline thunks.
>
> I haven't seen any reports of this triggering on an unpatched
> kernel.
>
> Cc: Matt Rickard <m...@softrans.com.au>
> Cc: Jason Vas Dias <jason.vas.d...@gmail.com>
> Cc: David Woodhouse <dw...@infradead.org>
> Cc: Peter Zijlstra <pet...@infradead.org>
> Cc: Andi Kleen <a...@linux.intel.com>
> Fixes: commit 76b043848fd2 ("x86/retpoline: Add initial retpoline support")
> Signed-off-by: Andy Lutomirski <l...@kernel.org>Acked-by: David Woodhouse <d...@amazon.co.uk> Thanks.
smime.p7s
Description: S/MIME cryptographic signature
