Re: [RFC PATCH v3 11/11] mseal:add documentation

Jeff Xu jeffxu@chromium.org wrote:

...

Jeff - mind changing the EACESS to EPERM, and we'll have something that is more-or-less compatible between Linux and OpenBSD?

Sounds Good. I will make the necessary changes in the next version.

Thanks! That is so awesome!

On the OpenBSD side, I am close to landing our madvise / msync changes.

Then we are mostly in sync.

It was on my radar for a year, but delayed because I was ponderingn blocking the destructive madvise / msync ops on regular non-writeable pages. These ops remain a page-zero gadget against regular (mutable) readonly pages, and it bothers me. I've heard rumour this has been used in a nasty way, and I think the sloppily defined semantics could use a strict modernization.