Add CAP_SYSLOG to ensure that /dev/kmsg can be accesses on systems where
the sysctl kernel.dmesg_restrict = 1.
Signed-off-by: Odin Ugedal <odin@uged.al>
(cherry picked from commit 6be088d69d)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
The ParentImage set by the test should be a path relative to
ImagesDirectory, pointing to a parent images directory (created
by pre-dump).
The parent directory is created by TempDir and so its name is not
constant but has a variable suffix. So, the config was pointing to
a non-existent directory.
This left unnoticed by criu as it assumed the parent image does not
exist, and performed a full dump.
Since criu PR 1403 (will be a part of criu 3.16) that is no longer the
case -- the invalid parent path is treated as an error, and so our
test fails like this:
== RUN TestCheckpoint
checkpoint_test.go:145: === /tmp/criu070876105/dump.log ===
checkpoint_test.go:145: open /tmp/criu070876105/dump.log: no such file or directory
checkpoint_test.go:146: criu failed: type DUMP errno 56
log file: /tmp/criu070876105/dump.log
--- FAIL: TestCheckpoint (0.26s)
Fix this by using the actual name of the parent image dir.
Fixes: 98f004182b
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This is helpful to kubernetes in cases it knows for sure that the freeze
is not required (since it created the systemd unit with no device
restrictions).
As the code is trivial, no tests are required.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 9a095e44db)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Add a test for freezeBeforeSet, checking various scenarios including
those that were failing before the fix in the previous commit.
[v2: add more cases, add a check before creating a unit.]
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit fec49f2a6c)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This fixes the behavior intended to avoid freezing containers/control
groups without it being necessary. This is important for end users of
libcontainer who rely on the behavior of no freeze.
The previous implementation would always get error trying to get
DevicePolicy from the Unit via dbus, since the Unit interface doesn't
contain DevicePolicy.
Signed-off-by: Odin Ugedal <odin@uged.al>
(cherry picked from commit 41043673b7)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Commit 2bab4a5 resulted in a warning from gcc:
nsexec.c: In function ‘write_log’:
nsexec.c:171:2: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
171 | write(logfd, json, ret);
| ^~~~~~~~~~~~~~~~~~~~~~~
As there's nothing we can or want to do in case write fails,
let's just tell the compiler we're not going to use it.
Fixes: 2bab4a5
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit db8330c9e5)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
As reported in issue 3119, there is a race in nsexec logging
that can lead to garbled json received by log forwarder, which
complains about it with a "failed to decode" error.
This happens because dprintf (used since the very beginning of nsexec
logging introduced in commit ba3cabf932) relies on multiple write(2)
calls, and with additional logging added by 64bb59f592 a race is
possible between runc init parent and its children.
The fix is to prepare a string and write it using a single call to
write(2).
[v2: NULLify json on error from asprintf]
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 2bab4a56f1)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This fixes using runc with podman on my system (Fedora 34).
> $ podman --runtime `pwd`/runc run --rm --memory 4M fedora echo it works
> Error: unable to start container process: error adding seccomp filter rule for syscall bdflush: permission denied: OCI permission denied
The problem is, libseccomp returns EPERM when a redundant rule (i.e. the
rule with the same action as the default one) is added, and podman (on
my machine) sets the following rules in config.json:
<....>
"seccomp": {
"defaultAction": "SCMP_ACT_ERRNO",
"architectures": [
"SCMP_ARCH_X86_64",
"SCMP_ARCH_X86",
"SCMP_ARCH_X32"
],
"syscalls": [
{
"names": [
"bdflush",
"io_pgetevents",
<....>
],
"action": "SCMP_ACT_ERRNO",
"errnoRet": 1
},
<....>
(Note that defaultErrnoRet is not set, but it defaults to 1).
With this commit, it works:
> $ podman --runtime `pwd`/runc run --memory 4M fedora echo it works
> it works
Add an integration test (that fails without the fix).
Similar crun commit:
* https://github.com/containers/crun/commit/08229f3fb904c5ea19a7d9
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Cherry picked from commit 5dd92fd9b4.
Minor conflict in libcontainer/seccomp/seccomp_linux.go due to
missing commit e44bee1026.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
As reported in issue 3084, sometimes setting CPU quota period fails
when a new period is lower and a parent cgroup has CPU quota limit set.
This happens as in cgroup v1 the quota and the period can not be set
together (this is fixed in v2), and since the period is being set first,
new_limit = old_quota/new_period may be higher than the parent cgroup
limit.
The fix is to retry setting the period after the quota, to cover all
possible scenarios.
Add a test case to cover a regression caused by an earlier version of
this patch (ignoring a failure of setting invalid period when quota is
not set).
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 1b77ebe2c4fa0c6d576dc587aa69e05f6bafd898)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
As Cirrus CI does not provide a real terminal this uses the same
'ssh -tt' workaround as the Vagrant setup. This sets up the
CentOS 7 and 8 to allow SSH as root to localhost so that we can run
all the tests via 'ssh -tt'.
Not going through vagrant reduces CI times for CentOS 7 and 8 from 6
minutes to 4 minutes.
Signed-off-by: Adrian Reber <areber@redhat.com>
(cherry picked from commit 9f656dbb11)
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
Without this, the test case fails with
> Writing 1000000 to /sys/fs/cgroup/cpu,cpuacct/runc-cgroups-integration-test/cpu.rt_period_us
> /tmp/bats-run-106836/bats.116418.src: line 548: /sys/fs/cgroup/cpu,cpuacct/runc-cgroups-integration-test/cpu.rt_period_us: Permission denied
Since we do not currently have a setup to test this, this went
unnoticed (can be seen in RHEL8 though).
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Signed-off-by: Adrian Reber <areber@redhat.com>
(cherry picked from commit d448016486)
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
Since commit f09a3e1b8d, the value passed on to read starts with
a slash, resulting in the first element of the array to be empty.
As a result, the test tries to write to the top-level cgroup, which
fails when rootless:
> # Writing 1000000 to /sys/fs/cgroup/cpu,cpuacct//cpu.rt_period_us
> # /tmp/bats-run-106184/bats.115768.src: line 548: /sys/fs/cgroup/cpu,cpuacct//cpu.rt_period_us: Permission denied
To fix, remove the leading slash.
An alternative fix would be to do "for ((i = 1;" instead of "i = 0", but
that seems less readable.
Fixes: f09a3e1b8d
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 86af524866)
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
TestPodSkipDevicesUpdate checks that updating a pod having SkipDevices: true
does not result in spurious "permission denied" errors in a container
running under the pod. The test is somewhat similar in nature to the
@test "update devices [minimal transition rules]" in tests/integration,
but uses a pod.
This tests the validity of freezeBeforeSet in v1.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit a71102624d)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This was initially added by commit 3e5c199708 because Set (with
r.Freezer = Frozen) was not able to freeze a container.
Now (see a few previous commits) Set can do the freeze, so the explicit
Freeze is no longer needed.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 52dd96db6b)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Introduce freezeBeforeSet, which contains the logic of figuring out
whether we need to freeze/thaw around setting systemd unit properties.
In particular, if SkipDevices is set, and the current unit properties
allow all devices, there is no need to freeze and thaw, as systemd
won't write any device rules in this case.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit f2db87986c,
minor conflict in include() due to missing commit
b60e2edf75)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
In addition to freezing and thawing a container via Pause/Resume,
there is a way to also do so via Set.
This way was broken though and is being fixed by a few preceding
commits. The test is added to make sure this is fixed and won't regress.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 5dc3260431)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
The t.Name() usage in libcontainer/integration prevented subtests
to be used, since in such case it returns a string containing "/",
and thus it can't be used to name a container.
Fix this by replacing slashes with underscores where appropriate.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit af1688a544)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
m.Freeze method changes m.cgroups.Resources.Freezer field, which should
not be done while we're temporarily freezing the cgroup in Set. If this
field is changed, and r == m.cgroups.Resources (as it often happens),
this results in inability to freeze the container using Set().
To fix, add and use a method which does not change r.Freezer field.
A test case for the bug will be added separately.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 67cfd3d400)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Since device updates in cgroup v2 are atomic for systemd, there is no
need to freeze the processes before running the updates.
Signed-off-by: Odin Ugedal <odin@uged.al>
(cherry picked from commit f33be7cc98, trivial conflict
due to missing commit b60e2edf75)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Run device update tests on cgroup v2, and add a test verifying that we
don't allow access to devices when we don't intend to.
Signed-off-by: Odin Ugedal <odin@uged.al>
(cherry picked from commit d41a273dae)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This is necessary in order for runc to be able to configure device
cgroups with --systemd-cgroup on distributions that have very strict
SELinux policies such as openSUSE MicroOS[1].
The core issue here is that systemd is adding its own BPF policy that
has an SELinux label such that runc cannot interact with it. In order to
work around this, we can just ignore the policy -- in theory this
behaviour is not correct but given that the most obvious case
(--systemd-cgroup) will still handle updates correctly, this logic is
reasonable.
[1]: https://bugzilla.suse.com/show_bug.cgi?id=1182428
Fixes: d0f2c25f52 ("cgroup2: devices: replace all existing filters when attaching")
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
(cherry picked from commit 57e3c54182)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
We need to update the eBPF library so that we can get the raw syscall
errors from bpf(2) syscalls using errors.Is.
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
(cherry picked from commit fe518a0678)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
If a control group is frozen, all its descendants will report FROZEN
in freezer.state cgroup file.
OTOH cgroup v2 cgroup.freeze is not reporting the cgroup as frozen
unless it is frozen directly (i.e. not via an ancestor).
Fix the discrepancy between v1 and v2 drivers behavior by
looking into freezer.self_freezing cgroup file, which, according
to kernel documentation, will show 1 iff the cgroup was frozen directly.
Co-authored-by: Kir Kolyshkin <kolyshkin@gmail.com>
Signed-off-by: Odin Ugedal <odin@uged.al>
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 294c4866ea)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Kailun Qin