Re: [PATCH v2] mm: mmap: allow for the maximum number of bits for randomizing mmap_base by default

[Andrew Morton]

On Tue, 11 Jun 2024 21:35:24 -0400 Rafael Aquini <aquini@xxxxxxxxxx> wrote:

> > Shouldn't we make this the default (at least for 32-bit) so the
> > regressed kernels are fixed simply by applying this patch?
> > 
> 
> That is a fair take, indeed. I guess we could do something like
> 
>  config FORCE_MAX_MMAP_RND_BITS
>         bool "Force maximum number of bits to use for ASLR of mmap base address"
> -       default n
> +       default y if !64BIT

"something like" != "exhaustively tested" ;)

I'll toss that in there, but please do let me know when it is suitable
for an upstream merge.

I also added cc:stable.