David Miller [off-list ref] writes:
From: <redacted> (Eric W. Biederman)
Date: Mon, 25 Jul 2016 19:02:01 -0500
quoted
Which means this change gets has to wait for next cycle.
Ok.
For clarity I intend to merge these changes through the userns tree,
when the issues are resolved.
I Cc'd netdev as there is a limit on the number of network namespaces in
this set which may be of interest to networking folks.
I expect there will be some follow on about adding sanity checking
limits to other kernel data structures like a maximum number of mounts
in a mount namespace, and perhaps a maximum number of routes in a
network namespace.
User namespaces have enabled unprivileged users access to a lot more
data structures and so to catch programs that go crazy we need a lot
more limits. I believe some of those limits make sense per namespace.
As it is easy in some cases to say any more than Y number of those
per namespace is excessive. For example a limit of 1,000,000 ipv4
routes per network namespaces is a sanity check as there are
currently 621,649 ipv4 prefixes advertized in bgp.
But that is something to worry about after the merge window.
Eric