This is useful for preventing CVE-2018-15664 where a malicious container process can take advantage of a race on symlink resolution/sanitization. Before this change chrootarchive would chroot to the destination directory which is attacker controlled. With this patch we always chroot to the container's root which is not attacker controlled. Signed-off-by: Brian Goff <cpuguy83@gmail.com> (cherry picked from commit d089b639372a8f9301747ea56eaf0a42df24016a) Signed-off-by: Sebastiaan van Stijn <github@gone.nl> Upstream-commit: 155939994f453559676656bc4b05635e83ebef56 Component: engine
pkg/ is a collection of utility packages used by the Moby project without being specific to its internals.
Utility packages are kept separate from the moby core codebase to keep it as small and concise as possible. If some utilities grow larger and their APIs stabilize, they may be moved to their own repository under the Moby organization, to facilitate re-use by other projects. However that is not the priority.
The directory pkg is named after the same directory in the camlistore project. Since Brad is a core
Go maintainer, we thought it made sense to copy his methods for organizing Go code :) Thanks Brad!
Because utility packages are small and neatly separated from the rest of the codebase, they are a good place to start for aspiring maintainers and contributors. Get in touch if you want to help maintain them!