Re: [PATCH v1] compiler: prevent dead store elimination

From: Alexey Dobriyan
Date: Mon Mar 01 2010 - 04:33:46 EST


On Mon, Mar 1, 2010 at 11:32 AM, Mikael Pettersson <mikpe@xxxxxxxx> wrote:
> Arjan van de Ven writes:
>  > On Sat, 27 Feb 2010 21:47:42 +0100
>  > Roel Kluin <roel.kluin@xxxxxxxxx> wrote:
>  > > +void secure_bzero(void *p, size_t n)
>  > > +{
>  > > +  memset(p, 0, n);
>  > > +  ARRAY_PREVENT_DSE(p, n);
>  > > +}
>  > > +EXPORT_SYMBOL(secure_bzero);
>  >
>  >
>  > please don't introduce bzero again to the kernel;
>  >
>  > make it secure_memset() please.

What's so secure in this function? :^)
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