Juerg is right. I actually took this problem to upstream's mailing list: https://lists.err.no/pipermail/mpm-itk/2015-November/000958.html
Juerg's patch seems to unconditionally cap gid's and uid's to UINT_MAX, which I think is 65535 on all platforms. I am not sure how that's different from current behavior, though maybe I missed something. Regardless, I think the limits need to be set differently on different architectures to keep the 32-bit compatibility around. At least I think that's upstream's intent. I posted a patch which fixes the problem for me to that mailing list. No one has looked it over yet. I don't have a 32-bit system handy to test but the patch is pretty simple. I don't think upstream needs the patch because, by my inspection of the latest source code, they have already fixed the problem. ** Patch added: "Patch in review at mpm-itk" https://bugs.launchpad.net/ubuntu/+source/mpm-itk/+bug/1517214/+attachment/4529190/+files/fix-setgid-setuid-cap.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1517214 Title: Does not support uid's and gid's above 65535 on x86-64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mpm-itk/+bug/1517214/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs