On Thu, Nov 17, 2022 at 08:10:05PM -0700, Theo de Raadt wrote:
> So this static executable is completely immutable, except for the
> OPENBSD_MUTABLE region. This annotation is used in one place now, deep
> inside libc's malloc(3) code, where a piece of code flips a data structure
> between readonly and read-write as a security measure. That does not become
> immutable. It happens to be an page.
This will change.
I have code ready to change the init of that malloc data structure so
that the one page wil be modified to contain the right data, then made
readonly and then made immutable.
-Otto
