On Wed, Sep 30, 2015 at 11:13 AM, Tycho Andersen <tycho.ander...@canonical.com> wrote: > This patch introduces the concept of a seccomp fd, with a similar interface > and usage to ebpf fds. Initially, one is allowed to create, install, and > dump these fds. Any manipulation of seccomp fds requires users to be root > in their own user namespace, matching the checks done for > SECCOMP_SET_MODE_FILTER. > > Installing a filterfd has some gotchas, though. Andy mentioned previously > that we should restrict installation to filter fds whose parent is already > in the filter tree. This doesn't quite work in the case of created seccomp > fds, since once you install a filter fd, you can't install any other filter > fd since it has no parent and there is no way to "pre-chain" filters before > installing them.
ISTM, if we like the seccomp fd approach, we should have them be created with a parent already set. IOW the default should be that their parent is the creator's seccomp fd and, if needed, creators could specify a different parent. --Andy -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
