Package: linux-image-3.16.0-4-amd64 Version: 3.16.7-ckt17-1 The upload to jessie of linux 3.16.7-ckt17-1 included the following change:
- mnt: Refactor the logic for mounting sysfs and proc in a user namespace [1] This broke mounting sysfs and procfs under a user namespace. There is a fix at [2] that claims to solve the problem. It would be great if this fix could be included in the next upload to jessie. Sadly, I haven't had time to run on my machine a kernel that includes that fix. I do know, however, that the problem is still present in 3.16.36-1+deb8u1. Thanks for considering, -d [1]: Original commit (I believe): https://patchwork.kernel.org/patch/6408681/ [2]: Fix: https://lists.linuxfoundation.org/pipermail/containers/2015-May/035874.html