Re: [PATCH v6 0/3] SELinux support for anonymous inodes and UFFD

[James Morris]

On Fri, 7 Aug 2020, Lokesh Gidra wrote:

> Userfaultfd in unprivileged contexts could be potentially very
> useful. We'd like to harden userfaultfd to make such unprivileged use
> less risky. This patch series allows SELinux to manage userfaultfd
> file descriptors and in the future, other kinds of
> anonymous-inode-based file descriptor.  SELinux policy authors can
> apply policy types to anonymous inodes by providing name-based
> transition rules keyed off the anonymous inode internal name (
> "[userfaultfd]" in the case of userfaultfd(2) file descriptors) and
> applying policy to the new SIDs thus produced.

Can you expand more on why this would be useful, e.g. use-cases?


-- 
James Morris
<jmorris@xxxxxxxxx>