On Tue, Mar 15, 2016 at 1:05 PM, Andy Lutomirski <[email protected]> wrote: > New devpts instances have ptmx owned by the inner uid and gid 0. > > For container-style namespaces (LXC, etc), this should have no > effect, this is fine. > > For sandbox-style namespaces (xdg-app and similar), this is > problematic -- there may not be an inner 0:0. If that happens, > devpts mounts will fail. > > Fix it by adding a fallback: if 0:0 is not mapped but the userns > owner and group are mapped, then ptmx will be owned by the namespace > owner. > > This won't change behavior except in cases where mount would > currently return -EINVAL.
Eric, this patch is straightforward, fixes a real problem, and is mostly orthogonal to the devpts stuff you're working on. Could you apply it for 4.7? --Andy
