Re: [PATCH 0/3] properly account for stack randomization and guard gap

From: Ingo Molnar
Date: Fri Jun 23 2017 - 04:35:32 EST



* riel@xxxxxxxxxx <riel@xxxxxxxxxx> wrote:

> When RLIMIT_STACK is larger than the minimum gap enforced by
> mmap_base(), it is possible for the kernel to place the mmap
> area where the stack wants to grow, resulting in the stack
> not being able to use the space that should have been allocated
> to it through RLIMIT_STACK.
>
> This series ensures that x86, ARM64, and PPC have at least
> RLIMIT_STACK + stack randomization + the stack guard gap
> space available for the stack.
>
> s390 seems to be ok. I have not checked other architectures.

x86 patch LGTM:

Acked-by: Ingo Molnar <mingo@xxxxxxxxxx>

... but I suspect this wants to go via -mm or Linus directly?

Thanks,

Ingo