3029e765e2 broke compilation on
non-Linux/Windows systems.
This change fixes that.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
(cherry picked from commit 34d5b8867f)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
environment not in the chroot from untrusted files.
See also OpenVZ a3f732ef75/src/enter.c (L227-L234)
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
(cherry picked from commit cea6dca993c2b4cfa99b1e7a19ca134c8ebc236b)
Signed-off-by: Tibor Vass <tibor@docker.com>
Previously, getWalkRoot("/", "foo") would return "//foo"
Now it returns "/foo"
Signed-off-by: Tibor Vass <tibor@docker.com>
(cherry picked from commit 7410f1a859)
Signed-off-by: Tibor Vass <tibor@docker.com>
Moby currently sorts uid and gid ranges in id maps. This causes subuid
and subgid files to be interpreted wrongly.
The subuid file
```
> cat /etc/subuid
jonas:100000:1000
jonas:1000:1
```
configures that the container uids 0-999 are mapped to the host uids
100000-100999 and uid 1000 in the container is mapped to uid 1000 on the
host. The expected uid_map is:
```
> docker run ubuntu cat /proc/self/uid_map
0 100000 1000
1000 1000 1
```
Moby currently sorts the ranges by the first id in the range. Therefore
with the subuid file above the uid 0 in the container is mapped to uid
100000 on host and the uids 1-1000 in container are mapped to the uids
1-1000 on the host. The resulting uid_map is:
```
> docker run ubuntu cat /proc/self/uid_map
0 1000 1
1 100000 1000
```
The ordering was implemented to work around a limitation in Linux 3.8.
This is fixed since Linux 3.9 as stated on the user namespaces manpage
[1]:
> In the initial implementation (Linux 3.8), this requirement was
> satisfied by a simplistic implementation that imposed the further
> requirement that the values in both field 1 and field 2 of successive
> lines must be in ascending numerical order, which prevented some
> otherwise valid maps from being created. Linux 3.9 and later fix this
> limitation, allowing any valid set of nonoverlapping maps.
This fix changes the interpretation of subuid and subgid files which do
not have the ids of in the numerical order for each individual user.
This breaks users that rely on the current behaviour.
The desired mapping above - map low user ids in the container to high
user ids on the host and some higher user ids in the container to lower
user on host - can unfortunately not archived with the current
behaviour.
[1] http://man7.org/linux/man-pages/man7/user_namespaces.7.html
Signed-off-by: Jonas Dohse <jonas@dohse.ch>
(cherry picked from commit c4628d79d2)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Previously only unpack operations were supported with chroot.
This adds chroot support for packing operations.
This prevents potential breakouts when copying data from a container.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
(cherry picked from commit 3029e765e2)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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 d089b63937)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Katherine Louise Bouman is an imaging scientist and Assistant Professor
of Computer Science at the California Institute of Technology. She
researches computational methods for imaging, and developed an algorithm
that made possible the picture first visualization of a black hole
using the Event Horizon Telescope. - https://en.wikipedia.org/wiki/Katie_Bouman
Thank you for being amazing!
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
`/proc/self/mountinfo` uses `\040` for spaces, however, `parseInfoFile()`
did not decode those spaces in paths, therefore attempting to use `\040`
as a literal part of the path.
This patch un-quotes the `root` and `mount point` fields to fix
situations where paths contain spaces.
Note that the `mount source` field is not modified, given that
this field is documented (man `PROC(5)`) as:
filesystem-specific information or "none"
Which I interpreted as "the format in this field is undefined".
Reported-by: Daniil Yaroslavtsev <daniilyar@users.noreply.github.com>
Reported-by: Nathan Ringo <remexre@gmail.com>
Based-on-patch-by: Diego Becciolini <itizir@users.noreply.github.com>
Based-on-patch-by: Sergei Utinski <sergei-utinski@users.noreply.github.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
* Add new adjectives to the names generator
Signed-off-by: sh7dm <d3dx12.xx@gmail.com>
* Add some more adjectives to the names generator
Signed-off-by: sh7dm <d3dx12.xx@gmail.com>
Signed-off-by: John Howard <jhoward@microsoft.com>
Some permissions corrections here. Also needs re-vendor of go-winio.
- Create the layer folder directory as standard, not with SDDL. It will inherit permissions from the data-root correctly.
- Apply the VM Group SID access to layer.vhd
Permissions after this changes
Data root:
```
PS C:\> icacls test
test BUILTIN\Administrators:(OI)(CI)(F)
NT AUTHORITY\SYSTEM:(OI)(CI)(F)
```
lcow subdirectory under dataroot
```
PS C:\> icacls test\lcow
test\lcow BUILTIN\Administrators:(I)(OI)(CI)(F)
NT AUTHORITY\SYSTEM:(I)(OI)(CI)(F)
```
layer.vhd in a layer folder for LCOW
```
.\test\lcow\c33923d21c9621fea2f990a8778f469ecdbdc57fd9ca682565d1fa86fadd5d95\layer.vhd NT VIRTUAL MACHINE\Virtual Machines:(R)
BUILTIN\Administrators:(I)(F)
NT AUTHORITY\SYSTEM:(I)(F)
```
And showing working
```
PS C:\> docker-ci-zap -folder=c:\test
INFO: Zapped successfully
PS C:\> docker run --rm alpine echo hello
Unable to find image 'alpine:latest' locally
latest: Pulling from library/alpine
8e402f1a9c57: Pull complete
Digest: sha256:644fcb1a676b5165371437feaa922943aaf7afcfa8bfee4472f6860aad1ef2a0
Status: Downloaded newer image for alpine:latest
hello
```
This patch hard-codes support for NVIDIA GPUs.
In a future patch it should move out into its own Device Plugin.
Signed-off-by: Tibor Vass <tibor@docker.com>
Signed-off-by: John Howard <jhoward@microsoft.com>
Also fixes https://github.com/moby/moby/issues/22874
This commit is a pre-requisite to moving moby/moby on Windows to using
Containerd for its runtime.
The reason for this is that the interface between moby and containerd
for the runtime is an OCI spec which must be unambigious.
It is the responsibility of the runtime (runhcs in the case of
containerd on Windows) to ensure that arguments are escaped prior
to calling into HCS and onwards to the Win32 CreateProcess call.
Previously, the builder was always escaping arguments which has
led to several bugs in moby. Because the local runtime in
libcontainerd had context of whether or not arguments were escaped,
it was possible to hack around in daemon/oci_windows.go with
knowledge of the context of the call (from builder or not).
With a remote runtime, this is not possible as there's rightly
no context of the caller passed across in the OCI spec. Put another
way, as I put above, the OCI spec must be unambigious.
The other previous limitation (which leads to various subtle bugs)
is that moby is coded entirely from a Linux-centric point of view.
Unfortunately, Windows != Linux. Windows CreateProcess uses a
command line, not an array of arguments. And it has very specific
rules about how to escape a command line. Some interesting reading
links about this are:
https://blogs.msdn.microsoft.com/twistylittlepassagesallalike/2011/04/23/everyone-quotes-command-line-arguments-the-wrong-way/https://stackoverflow.com/questions/31838469/how-do-i-convert-argv-to-lpcommandline-parameter-of-createprocesshttps://docs.microsoft.com/en-us/cpp/cpp/parsing-cpp-command-line-arguments?view=vs-2017
For this reason, the OCI spec has recently been updated to cater
for more natural syntax by including a CommandLine option in
Process.
What does this commit do?
Primary objective is to ensure that the built OCI spec is unambigious.
It changes the builder so that `ArgsEscaped` as commited in a
layer is only controlled by the use of CMD or ENTRYPOINT.
Subsequently, when calling in to create a container from the builder,
if follows a different path to both `docker run` and `docker create`
using the added `ContainerCreateIgnoreImagesArgsEscaped`. This allows
a RUN from the builder to control how to escape in the OCI spec.
It changes the builder so that when shell form is used for RUN,
CMD or ENTRYPOINT, it builds (for WCOW) a more natural command line
using the original as put by the user in the dockerfile, not
the parsed version as a set of args which loses fidelity.
This command line is put into args[0] and `ArgsEscaped` is set
to true for CMD or ENTRYPOINT. A RUN statement does not commit
`ArgsEscaped` to the commited layer regardless or whether shell
or exec form were used.
Signed-off-by: John Howard <jhoward@microsoft.com>
This is the first step in refactoring moby (dockerd) to use containerd on Windows.
Similar to the current model in Linux, this adds the option to enable it for runtime.
It does not switch the graphdriver to containerd snapshotters.
- Refactors libcontainerd to a series of subpackages so that either a
"local" containerd (1) or a "remote" (2) containerd can be loaded as opposed
to conditional compile as "local" for Windows and "remote" for Linux.
- Updates libcontainerd such that Windows has an option to allow the use of a
"remote" containerd. Here, it communicates over a named pipe using GRPC.
This is currently guarded behind the experimental flag, an environment variable,
and the providing of a pipename to connect to containerd.
- Infrastructure pieces such as under pkg/system to have helper functions for
determining whether containerd is being used.
(1) "local" containerd is what the daemon on Windows has used since inception.
It's not really containerd at all - it's simply local invocation of HCS APIs
directly in-process from the daemon through the Microsoft/hcsshim library.
(2) "remote" containerd is what docker on Linux uses for it's runtime. It means
that there is a separate containerd service running, and docker communicates over
GRPC to it.
To try this out, you will need to start with something like the following:
Window 1:
containerd --log-level debug
Window 2:
$env:DOCKER_WINDOWS_CONTAINERD=1
dockerd --experimental -D --containerd \\.\pipe\containerd-containerd
You will need the following binary from github.com/containerd/containerd in your path:
- containerd.exe
You will need the following binaries from github.com/Microsoft/hcsshim in your path:
- runhcs.exe
- containerd-shim-runhcs-v1.exe
For LCOW, it will require and initrd.img and kernel in `C:\Program Files\Linux Containers`.
This is no different to the current requirements. However, you may need updated binaries,
particularly initrd.img built from Microsoft/opengcs as (at the time of writing), Linuxkit
binaries are somewhat out of date.
Note that containerd and hcsshim for HCS v2 APIs do not yet support all the required
functionality needed for docker. This will come in time - this is a baby (although large)
step to migrating Docker on Windows to containerd.
Note that the HCS v2 APIs are only called on RS5+ builds. RS1..RS4 will still use
HCS v1 APIs as the v2 APIs were not fully developed enough on these builds to be usable.
This abstraction is done in HCSShim. (Referring specifically to runtime)
Note the LCOW graphdriver still uses HCS v1 APIs regardless.
Note also that this does not migrate docker to use containerd snapshotters
rather than graphdrivers. This needs to be done in conjunction with Linux also
doing the same switch.
This function was previously used on the client to validate
tmpfs options, but is no longer used since
b9b8d8b364, as this validation
is platform-specific, so should be handled by the daemon.
Removing this function as it's no longer used anywhere.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Please refer to `docs/rootless.md`.
TLDR:
* Make sure `/etc/subuid` and `/etc/subgid` contain the entry for you
* `dockerd-rootless.sh --experimental`
* `docker -H unix://$XDG_RUNTIME_DIR/docker.sock run ...`
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
As reported in docker/for-linux/issues/484, since Docker 18.06
docker cp with a destination file name fails with the following error:
> archive/tar: cannot encode header: Format specifies USTAR; and USTAR cannot encode Name="a_very_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx_long_filename_that_is_101_characters"
The problem is caused by changes in Go 1.10 archive/tar, which
mis-guesses the tar stream format as USTAR (rather than PAX),
which, in turn, leads to inability to specify file names
longer than 100 characters.
This tar stream is sent by TarWithOptions() (which, since we switched to
Go 1.10, explicitly sets format=PAX for every file, see FileInfoHeader(),
and before Go 1.10 it was PAX by default). Unfortunately, the receiving
side, RebaseArchiveEntries(), which calls tar.Next(), mistakenly guesses
header format as USTAR, which leads to the above error.
The fix is easy: set the format to PAX in RebaseArchiveEntries()
where we read the tar stream and change the file name.
A unit test is added to prevent future regressions.
NOTE this code is not used by dockerd, but rather but docker cli
(also possibly other clients), so this needs to be re-vendored
to cli in order to take effect.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
RHEL/CentOS 3.10 kernels report that kernel-memory accounting is supported,
but it actually does not work.
Runc (when compiled for those kernels) will be compiled without kernel-memory
support, so even though the daemon may be reporting that it's supported,
it actually is not.
This cause tests to fail when testing against a daemon that's using a runc
version without kmem support.
For now, skip these tests based on the kernel version reported by the daemon.
This should fix failures such as:
```
FAIL: /go/src/github.com/docker/docker/integration-cli/docker_cli_run_unix_test.go:499: DockerSuite.TestRunWithKernelMemory
assertion failed:
Command: /usr/bin/docker run --kernel-memory 50M --name test1 busybox cat /sys/fs/cgroup/memory/memory.kmem.limit_in_bytes
ExitCode: 0
Error: <nil>
Stdout: 9223372036854771712
Stderr: WARNING: You specified a kernel memory limit on a kernel older than 4.0. Kernel memory limits are experimental on older kernels, it won't work as expected and can cause your system to be unstable.
Failures:
Expected stdout to contain "52428800"
FAIL: /go/src/github.com/docker/docker/integration-cli/docker_cli_update_unix_test.go:125: DockerSuite.TestUpdateKernelMemory
/go/src/github.com/docker/docker/integration-cli/docker_cli_update_unix_test.go:136:
...open /go/src/github.com/docker/docker/integration-cli/docker_cli_update_unix_test.go: no such file or directory
... obtained string = "9223372036854771712"
... expected string = "104857600"
----------------------------------------------------------------------
FAIL: /go/src/github.com/docker/docker/integration-cli/docker_cli_update_unix_test.go:139: DockerSuite.TestUpdateKernelMemoryUninitialized
/go/src/github.com/docker/docker/integration-cli/docker_cli_update_unix_test.go:149:
...open /go/src/github.com/docker/docker/integration-cli/docker_cli_update_unix_test.go: no such file or directory
... value = nil
```
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
* Replaces `cocks` with `cerf` as the former might be perceived as
offensive by some people (as pointed out by @jeking3
[here](https://github.com/moby/moby/pull/37157#commitcomment-31758059))
* Removes a duplicate entry for `burnell`
* Re-arranges the entry for `sutherland` to ensure that the names are in
sorted order
* Adds entries for `shamir` and `wilbur`
Signed-off-by: Debayan De <debayande@users.noreply.github.com>
The errors returned from Mount and Unmount functions are raw
syscall.Errno errors (like EPERM or EINVAL), which provides
no context about what has happened and why.
Similar to os.PathError type, introduce mount.Error type
with some context. The error messages will now look like this:
> mount /tmp/mount-tests/source:/tmp/mount-tests/target, flags: 0x1001: operation not permitted
or
> mount tmpfs:/tmp/mount-test-source-516297835: operation not permitted
Before this patch, it was just
> operation not permitted
[v2: add Cause()]
[v3: rename MountError to Error, document Cause()]
[v4: fixes; audited all users]
[v5: make Error type private; changes after @cpuguy83 reviews]
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
It has been pointed out that we're ignoring EINVAL from umount(2)
everywhere, so let's move it to a lower-level function. Also, its
implementation should be the same for any UNIX incarnation, so
let's consolidate it.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
syscall.Stat (and Lstat), unlike functions from os pkg,
return "raw" errors (like EPERM or EINVAL), and those are
propagated up the function call stack unchanged, and gets
logged and/or returned to the user as is.
Wrap those into os.PathError{} so the error message will
at least have function name and file name.
Note we use Capitalized function names to distinguish
between functions in os and ours.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Ubuntu kernel supports overlayfs in user namespaces.
However, Docker had previously crafting overlay opaques directly
using mknod(2) and setxattr(2), which are not supported in userns.
Tested with LXD, Ubuntu 18.04, kernel 4.15.0-36-generic #39-Ubuntu.
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
