(invalid would probably be a better status for the development release, but i dont' want to scare the SRU team :)
Uploaded a workaround for this bug. Using the upstream fix sadly is still broken by apparmor+overlayfs bugs. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1509752 Title: Bug in ensure_not_symlink() from 0003-CVE-2015-1335.patch Status in lxc package in Ubuntu: Fix Released Status in lxc source package in Trusty: New Bug description: ======================================================================= SRU Justification Impact: cannot start containers with lxc.mount.entries which are recursive bind mounts Regression potential: this makes assumptions about the ordering of /proc/self/mountinfo, but no more so than the original CVE patch. So it should not regress from the previous lxc version. Test case: #!/bin/sh set -ex cleanup() { umount /mnt/etc /mnt/proc || true lxc-stop -n t1 -k || true lxc-destroy -n t1 || true } trap cleanup EXIT mkdir -p /mnt/etc /mnt/proc mount --bind /etc /mnt/etc mount --bind /proc /mnt/proc lxc-create -t download -n t1 -- -d ubuntu -r trusty -a amd64 cat >> /var/lib/lxc/t1/config << EOF lxc.mount.entry = /mnt hostmnt none rbind,create=dir EOF lxc-start -n t1 -F -l trace -o /dev/stdout echo "DONE" ======================================================================= This bug/limitation is present in lxc from 1.0.7-0ubuntu0.5 through 1.0.7-0ubuntu0.9 (or anything that incorporates 0003-CVE-2015-1335.patch). Basically, the limitation is obvious when using recursive bind mounts because ensure_not_symlink() only checks the last line of /proc/self/mountinfo which will be a submount so will always fail the test and trigger: ensure_not_symlink: 1413 Mount onto /usr/lib/x86_64-linux- gnu/lxc/storage resulted in /usr/lib/x86_64-linux- gnu/lxc/storage/submount, not /usr/lib/x86_64-linux-gnu/lxc/storage Sorry if this is a duplicate, I did spend quite some time trying to find a similar report. Thanks! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1509752/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
