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Moby Project - a collaborative project for the container ecosystem to assemble container-based systems
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Tianon Gravi 567c01f6d1 seccomp: add support for "clone3" syscall in default policy 
This is a backport of 9f6b562dd1, adapted to avoid the refactoring that happened in d92739713c.

Original commit message is as follows:

> If no seccomp policy is requested, then the built-in default policy in
> dockerd applies. This has no rule for "clone3" defined, nor any default
> errno defined. So when runc receives the config it attempts to determine
> a default errno, using logic defined in its commit:
>
>   opencontainers/runc@7a8d716
>
> As explained in the above commit message, runc uses a heuristic to
> decide which errno to return by default:
>
> [quote]
>   The solution applied here is to prepend a "stub" filter which returns
>   -ENOSYS if the requested syscall has a larger syscall number than any
>   syscall mentioned in the filter. The reason for this specific rule is
>   that syscall numbers are (roughly) allocated sequentially and thus newer
>   syscalls will (usually) have a larger syscall number -- thus causing our
>   filters to produce -ENOSYS if the filter was written before the syscall
>   existed.
> [/quote]
>
> Unfortunately clone3 appears to one of the edge cases that does not
> result in use of ENOSYS, instead ending up with the historical EPERM
> errno.
>
> Latest glibc (2.33.9000, in Fedora 35 rawhide) will attempt to use
> clone3 by default. If it sees ENOSYS then it will automatically
> fallback to using clone. Any other errno is treated as a fatal
> error. Thus when docker seccomp policy triggers EPERM from clone3,
> no fallback occurs and programs are thus unable to spawn threads.
>
> The clone3 syscall is much more complicated than clone, most notably its
> flags are not exposed as a directly argument any more. Instead they are
> hidden inside a struct. This means that seccomp filters are unable to
> apply policy based on values seen in flags. Thus we can't directly
> replicate the current "clone" filtering for "clone3". We can at least
> ensure "clone3" returns ENOSYS errno, to trigger fallback to "clone"
> at which point we can filter on flags.

Signed-off-by: Tianon Gravi <admwiggin@gmail.com>
Co-authored-by: Daniel P. Berrangé <berrange@redhat.com>
 		2021-09-13 08:56:21 -07:00
.github Remove refs to jhowardmsft from .go code 2019-09-25 10:51:18 -07:00
api API: fix 404 status description on container create 2021-07-07 11:50:43 +02:00
builder builder-next: relax second cache key requirements for schema1 2021-05-17 14:58:16 +02:00
cli remove uses of deprecated pkg/term 2020-04-21 16:29:27 +02:00
client Update documentation links 2021-02-25 21:54:39 +01:00
cmd/dockerd buildkit: Apply apparmor profile 2021-01-28 21:33:12 +00:00
container Swarm config: use absolute paths for mount destination strings 2021-05-18 09:25:34 +02:00
contrib rootless: fix "x509: certificate signed by unknown authority" on openSUSE Tumbleweed 2021-07-06 18:57:43 +09:00
daemon Merge pull request #42633 from thaJeztah/20.10_backport_warn_on_non_matching_platform 2021-07-15 20:46:08 +02:00
distribution pull: Validate layer digest format 2021-01-28 21:33:12 +00:00
dockerversion Use -X ldflags to set dockerversion package vars 2019-12-02 10:21:41 -08:00
docs API: fix 404 status description on container create 2021-07-07 11:50:43 +02:00
errdefs Implement Unwrap to errors 2020-11-21 16:36:35 +01:00
hack Merge pull request #42695 from thaJeztah/20.10_update_containerd_1.4.9 2021-07-30 03:30:57 +02:00
image replace json.Unmarshal with NewFromJSON in Create 2021-02-17 21:18:19 +01:00
integration integration: ensurePlugin: disable go modules when building plugin 2021-07-15 22:25:29 +02:00
integration-cli integration: remove KernelMemory tests 2021-05-18 09:25:38 +02:00
internal/test/suite integration-cli: move each test suite to its own TestX testing function 2019-09-18 18:26:36 +00:00
layer replace pkg/locker with github.com/moby/locker 2020-09-10 22:15:40 +02:00
libcontainerd Added container ID to containerd task delete event messages 2020-10-30 20:58:57 -07:00
oci Fix daemon panic when starting container with invalid device cgroup rule 2021-02-17 21:16:01 +01:00
opts opts: unify host-options, and use consts 2020-10-31 16:44:21 +01:00
patches update archive/tar patch for go 1.16 2021-07-16 19:45:14 +02:00
pkg pkg/fileutils: TestMatches: remove cases no longer valid for go1.16 2021-07-15 22:24:50 +02:00
plugin Use docker media type for plugin layers 2021-04-06 16:52:54 +00:00
profiles seccomp: add support for "clone3" syscall in default policy 2021-09-13 08:56:21 -07:00
project vendor: opencontainers/selinux v1.8.0, and remove selinux build-tag and stubs 2020-12-24 00:47:16 +01:00
quota quota: move test helper functions to extra file 2020-10-05 13:28:25 +00:00
reference fix goimports 2020-02-11 22:16:54 +09:00
registry registry.loginV2(): minor cleanup 2020-10-29 22:26:57 +01:00
reports Fix typos 2018-05-16 09:15:43 +08:00
restartmanager unconvert: remove unnescessary conversions 2019-09-18 12:57:33 +02:00
rootless rootless: fix getCurrentOOMScoreAdj 2021-04-01 12:11:27 +02:00
runconfig pkg/sysinfo: rm duplicates 2020-06-26 16:19:52 -07:00
testutil integration: ensurePlugin: disable go modules when building plugin 2021-07-15 22:25:29 +02:00
vendor updated vendored archive/tar to go1.16.5 2021-07-16 19:45:18 +02:00
volume Use real root with 0701 perms 2021-01-26 17:23:32 +00:00
.DEREK.yml Update .DEREK.yml 2019-05-06 13:27:04 -07:00
.dockerignore update .dockerignore to prevent '-unsupported' builds 2020-01-13 12:55:15 +01:00
.gitignore Use -X ldflags to set dockerversion package vars 2019-12-02 10:21:41 -08:00
.mailmap Update authors and mailmap 2020-08-06 01:57:12 +02:00
AUTHORS Update authors and mailmap 2020-08-06 01:57:12 +02:00
CHANGELOG.md Fix some typos 2018-09-07 13:13:47 +08:00
CONTRIBUTING.md Update CONTRIBUTING.md to have an option to keep name anonymous if requested 2019-07-15 16:04:11 +02:00
Dockerfile Update Go to 1.16.7 2021-08-07 18:16:20 +02:00
Dockerfile.buildx Dockerfile.buildx: update buildx to v0.5.1 2021-02-03 13:54:27 +01:00
Dockerfile.e2e Update Go to 1.16.7 2021-08-07 18:16:20 +02:00
Dockerfile.simple Update Go to 1.16.7 2021-08-07 18:16:20 +02:00
Dockerfile.windows Update Go to 1.16.7 2021-08-07 18:16:20 +02:00
Jenkinsfile Run s390x tests on Ubuntu 20.04 2021-07-02 14:41:13 +02:00
LICENSE Update LICENSE 2018-09-12 14:27:53 +01:00
MAINTAINERS Add myself as a curator 2020-01-09 15:03:38 -05:00
Makefile Makefile: remove empty targets, and slight refactor 2020-05-01 16:48:07 +02:00
NOTICE switch kr/pty to creack/pty v1.1.7 2019-07-29 16:59:08 -07:00
README.md Add "Lego set" back in README.md 2017-10-10 14:10:39 +00:00
ROADMAP.md Fix some typos in ROADMAP.md 2019-01-25 14:27:13 +08:00
SECURITY.md Update SECURITY.md to have an option to keep name anonymous if requested. 2019-06-18 16:37:16 +00:00
TESTING.md TESTING.md: note that integration-cli is deprecated 2020-12-18 07:51:46 +01:00
VENDORING.md fix the bare url and the Summary of http://semver.org 2017-01-17 16:20:11 +08:00
codecov.yml Add code coverage report and codecov config 2018-01-16 16:50:56 -05:00
poule.yml Poule: remove random assign 2019-09-05 20:57:17 +02:00
vendor.conf [20.10] vendor github.com/Microsoft/hcsshim 64a2b71405dacf76c95600f4c756a991ad09cf7c (moby branch) 2021-07-09 20:06:40 +02:00

README.md

The Moby Project

Moby Project logo

Moby is an open-source project created by Docker to enable and accelerate software containerization.

It provides a "Lego set" of toolkit components, the framework for assembling them into custom container-based systems, and a place for all container enthusiasts and professionals to experiment and exchange ideas. Components include container build tools, a container registry, orchestration tools, a runtime and more, and these can be used as building blocks in conjunction with other tools and projects.

Principles

Moby is an open project guided by strong principles, aiming to be modular, flexible and without too strong an opinion on user experience. It is open to the community to help set its direction.

  • Modular: the project includes lots of components that have well-defined functions and APIs that work together.
  • Batteries included but swappable: Moby includes enough components to build fully featured container system, but its modular architecture ensures that most of the components can be swapped by different implementations.
  • Usable security: Moby provides secure defaults without compromising usability.
  • Developer focused: The APIs are intended to be functional and useful to build powerful tools. They are not necessarily intended as end user tools but as components aimed at developers. Documentation and UX is aimed at developers not end users.

Audience

The Moby Project is intended for engineers, integrators and enthusiasts looking to modify, hack, fix, experiment, invent and build systems based on containers. It is not for people looking for a commercially supported system, but for people who want to work and learn with open source code.

Relationship with Docker

The components and tools in the Moby Project are initially the open source components that Docker and the community have built for the Docker Project. New projects can be added if they fit with the community goals. Docker is committed to using Moby as the upstream for the Docker Product. However, other projects are also encouraged to use Moby as an upstream, and to reuse the components in diverse ways, and all these uses will be treated in the same way. External maintainers and contributors are welcomed.

The Moby project is not intended as a location for support or feature requests for Docker products, but as a place for contributors to work on open source code, fix bugs, and make the code more useful. The releases are supported by the maintainers, community and users, on a best efforts basis only, and are not intended for customers who want enterprise or commercial support; Docker EE is the appropriate product for these use cases.

Legal

Brought to you courtesy of our legal counsel. For more context, please see the NOTICE document in this repo.

Use and transfer of Moby may be subject to certain restrictions by the United States and other governments.

It is your responsibility to ensure that your use and/or transfer does not violate applicable laws.

For more information, please see https://www.bis.doc.gov

Licensing

Moby is licensed under the Apache License, Version 2.0. See LICENSE for the full license text.