On Fri, Jul 25, 2014 at 4:27 PM, Andy Lutomirski <l...@amacapital.net> wrote:
> AFAIK this has no effect whatsoever unless x86 suddenly turns into a
> nommu architecture. Nonetheless, not setting it is suspicious.
Sorry, forgot to mention: this is based on tip/x86/vdso.
--Andy
>
> Reported-by: Nathan Lynch <nathan_ly...@mentor.com>
> Signed-off-by: Andy Lutomirski <l...@amacapital.net>
> ---
> arch/x86/vdso/vma.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/vdso/vma.c b/arch/x86/vdso/vma.c
> index dbef622..970463b 100644
> --- a/arch/x86/vdso/vma.c
> +++ b/arch/x86/vdso/vma.c
> @@ -138,7 +138,7 @@ static int map_vdso(const struct vdso_image *image, bool
> calculate_addr)
> vma = _install_special_mapping(mm,
> addr,
> -image->sym_vvar_start,
> - VM_READ,
> + VM_READ|VM_MAYREAD,
> &vvar_mapping);
>
> if (IS_ERR(vma)) {
> --
> 1.9.3
>
--
Andy Lutomirski
AMA Capital Management, LLC
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