Messages in this thread | | | From | Jonathan Corbet <> | Subject | Re: [PATCH v3 2/6] userfaultfd: add /dev/userfaultfd for fine grained access control | Date | Mon, 13 Jun 2022 17:23:14 -0600 |
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Axel Rasmussen <axelrasmussen@google.com> writes:
> I think for any approach involving syscalls, we need to be able to > control access to who can call a syscall. Maybe there's another way > I'm not aware of, but I think today the only mechanism to do this is > capabilities. I proposed adding a CAP_USERFAULTFD for this purpose, > but that approach was rejected [1]. So, I'm not sure of another way > besides using a device node.
I take it there's a reason why this can't be done with a security module - either a custom module or a policy in one of the existing modules? That sort of access control is just what security modules are supposed to be for, after all.
Thanks,
jon
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