On Sun, Feb 2, 2014 at 3:15 AM, Helge Deller <deller@xxxxxx> wrote:
>
> Anyway, the suggested & untested patch below should fix the metag arch
> to cope which my changes to fs/exec.c
> ...
> -#define STACK_RND_MASK (0)
> +#define STACK_RND_MASK (-1)
I don't think that works. That completely breaks randomize_stack_top().
So I'm not going to pull the parisc tree, this needs to be resolved sanely.
In fact, I think that change to fs/exec.c is just completely broken:
+ /* add some more stack size for stack randomization */
+ stack_base += STACK_RND_MASK + 1;
and that "+1" just doesn't make sense, and fundamentally breaks STACK_RND_MASK.
It also seems to be entirely pointless, since the PAGE_ALIGN() that
comes right afterwards will effectively do it anyway.
So NAK on that whole fs/exec.c change. Afaik it's just wrong, and it's stupid.
Linus
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