When signal installation was moved to a goroutine for performance,
containers that exited quickly could complete before SIGCHLD was
registered, causing runc to hang waiting for the signal.
This fix ensures SIGCHLD is registered immediately in the main thread
before other signals are handled in the goroutine, maintaining performance
while guaranteeing no missed SIGCHLD notifications for fast-exiting
containers.
Reported-by: Ayato Tokubi <atokubi@redhat.com>
Signed-off-by: lifubang <lifubang@acmcoder.com>
(cherry picked from commit 404181e4cc)
Signed-off-by: lifubang <lifubang@acmcoder.com>
This commit factors out setupAndMountToRootfs without changing any
logic. Use "Hide whitespace changes" during review to focus on the
actual changes.
The refactor ensures the mount source file descriptor is closed via
defer in each loop iteration, reducing the total number of open FDs
in runc. This helps avoid hitting the file descriptor limit under
high concurrency or when handling many mounts.
Signed-off-by: lifubang <lifubang@acmcoder.com>
(cherry picked from commit c77e71a3e7)
Signed-off-by: lifubang <lifubang@acmcoder.com>
This adds a CI job to run conmon tests with runc.
Related to issue 5151, PR 5153.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 192e3d416f)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Found out that these changes were backported to release-1.4 (PR 5040)
and made its way into runc v1.4.0, but were missing from its CHANGELOG.
Add the item to v1.4.0 changelog.
Same as commit e232a54 in main branch.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This function calls Init what normally never returns, so the defer only
works if there is an error and we can safely use it to close those fds
we opened. This was done for most but not all fds.
Reported in issue 5008.
Reported-by: Arina Cherednik <arinacherednik034@gmail.com>
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 88f897160c)
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
This includes a few fixes for 32-bit builds.
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
(cherry picked from commit b58e342758)
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Ever since v0.6.0 of github.com/cyphar/filepath-securejoin, pathrs-lite
has been able to transparently switch to using libpathrs as the backend
for safe path resolution (at compile-time, using a build tag). Note that
because build-tags apply globally, this allows for us to easily opt
pure-Go dependencies into all using libpathrs as well for our binaries.
In a future patch this will likely be enabled by default, but document
that this is an option for downstreams that want to opt-in to using
libpathrs.
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
(cherry picked from commit ab6f75dd25)
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
In a future patch this will contain other cdylibs so it deserves a
slightly more general name.
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
(cherry picked from commit 8292574e7a)
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
The intention of commit 531e29e192 ("script/lib.sh: set GOARM=5 for
armel, GOARM=6 for armhf") was to properly support older ARM platforms
with our release builds.
However, we have never been able to support ARMv6 for our builds because
we use the Debian compiler to build the libseccomp we statically compile
into our binaries and (as per the now-deleted comment itself) Debian
treats armhf as being ARMv7 so the final binaries we produced were
always only ever compatible with ARMv7+.
This was a bit of an oddity before but when building libpathrs for
releases we will need to use Rust which makes the target more explicit
(and while it does support armhf, we are using the Debian-packaged Rust
cross-compiler and thus are in the same dilemma with what Debian
considers "armhf" to be).
All-in-all, it's better to just bite the bullet and just follow Debian
here properly.
Fixes: 531e29e192 ("script/lib.sh: set GOARM=5 for armel, GOARM=6 for armhf")
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
(cherry picked from commit 51ae8de054)
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Debian 13 (trixie) was released a few months ago and it's probably
prudent to just upgrade. This is also necessary to get access to riscv64
repositories when we build libpathrs for inclusion in our runc binaries.
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
(cherry picked from commit 6b757b6aa0)
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
There is a chance of panic here -- eliminate it.
Add a test case (which panics before the fix).
Reported-by: Luke Hinds <luke@stacklok.com>
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit a48a7cef96)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Use t.Run for individual tests. Add missing desc fields.
Best reviewed with --ignore-all-space.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 392a221293)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This fixes random failures to start a container in conmon integration
tests (see issue 5151).
I guess we need to find another way to fix issue 4645.
This reverts commit 1b39997e73.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 5996fe143a)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
unix.CPUSet is limited to 1024 CPUs. Calling
unix.SchedSetaffinity(pid, cpuset) removes all CPUs starting from 1024
from allowed CPUs of pid, even if cpuset is all ones. As a
consequence, when runc tries to reset CPU affinity to "allow all" by
default, it prevents all containers from CPUs 1024 onwards.
This change uses a huge CPU mask to play safe and get all possible
CPUs enabled with a single sched_setaffinity call.
Fixes: #5023
Signed-off-by: Antti Kervinen <antti.kervinen@intel.com>
(cherry picked from commit 700c944c4d)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Some maintainers appear to have removed their PGP keys, which causes
"gpg --import" during "make validate-keyring" to fail. The solution is
to switch to a non-fatal warning if no keys were imported.
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
(cherry picked from commit 936a59b07f)
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
I no longer work at SUSE and thus this key (and email address) are no
longer associated with me.
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
(cherry picked from commit a691486c83)
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
SCMP_ACT_KILL terminates the process with a fatal signal, which may
produce a core dump depending on the host configuration.
While this is harmless on ephemeral CI instances, it can leave unwanted
core files on developer or customer systems. It also interferes with
test environments that detect unexpected core dumps.
Signed-off-by: Ricardo Branco <rbranco@suse.de>
(cherry picked from commit f18e97d312)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
When container-selinux 4:2.246.0-1.el10 is installed, it produces the
following %post script warnings:
> ...
> Running scriptlet: container-selinux-4:2.246.0-1.el10.noarch 26/37
> Installing : container-selinux-4:2.246.0-1.el10.noarch 26/37
> Running scriptlet: container-selinux-4:2.246.0-1.el10.noarch 26/37
> libsemanage.semanage_pipe_data: Child process /usr/libexec/selinux/hll/pp failed with code: 255. (No data available).
> libsemanage.semanage_compile_module: container: libsepol.policydb_read: policydb module version 24 does not match my version range 4-23.
> libsemanage.semanage_compile_module: container: libsepol.sepol_module_package_read: invalid module in module package (at section 0).
> libsemanage.semanage_compile_module: container: libsepol.sepol_ppfile_to_module_package: Failed to read policy package.
> libsemanage.semanage_direct_commit: Failed to compile hll files into cil files. (No data available).
> semodule: Failed!
> ...
For some reason, dnf install still succeeds, but when the selinux tests
fail with:
> chcon: failed to change context of '/tmp/bats-run-3MMyYP/runc.szTqBc/bundle/runc' to ‘system_u:object_r:container_runtime_exec_t:s0’: Invalid argument
All this is fixed once policycoreutils is added to the list of RPMS so
it is updated (from 3.9-3.el10 to 3.10-1.el10) during the same
transaction.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 3235c5a90a)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This commit is a squash of the following two commits:
1. ci: add go 1.26 rc2
This is mostly to test whether https://go.dev/cl/728642 results in
any test failures in the current CI matrix.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit e4e05423e4)
Signed-off-by: lifubang <lifubang@acmcoder.com>
2. ci: bump Go 1.26rc2 -> 1.26.x
Since Go 1.26.0 is released today.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit daa5ffcc84)
Signed-off-by: lifubang <lifubang@acmcoder.com>
Previously, when prepareCgroupFD would not open container's cgroup
(as configured in config.json and saved to state.json), it returned
a fatal error, as we presumed a container can't exist without its own
cgroup.
Apparently, it can. In a case when container is configured without
cgroupns (i.e. it uses hosts cgroups), and /sys/fs/cgroup is mounted
read-write, a rootful container's init can move itself to an entirely
different cgroup (even a new one that it just created), and then the
original container cgroup is removed by the kernel (or systemd?) as
it has no processes left. By the way, from the systemd point of view
the container is gone. And yet it is still there, and users want
runc exec to work!
And it worked, thanks to the "let's try container init's cgroup"
fallback as added by commit c91fe9aeba ("cgroup2: exec: join the
cgroup of the init process on EBUSY"). The fallback was added for
the entirely different reason, but it happened to work in this very
case, too.
This behavior was broken with the introduction of CLONE_INTO_CGROUP
support.
While it is debatable whether this is a valid scenario when a container
moves itself into a different cgroup, this very setup is used by e.g.
buildkitd running in a privileged kubernetes container (see issue 5089).
To restore the way things are expected to work, add the same "try
container init's cgroup" fallback into prepareCgroupFD.
While at it, simplify the code flow.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 6c07a37a58)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
1. Refactor addIntoCgroupV2 in an attempt to simplify it.
2. Fix the bug of not trying the init cgroup fallback if
rootlessCgroup is set. This is a bug because rootlessCgroup
tells to ignore cgroup join errors, not to never try the fallback.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 1d030fab7d)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Separate initProcessCgroupPath code out of addIntoCgroupV2.
To be used by the next patch.
While at it, describe the new scenario in which the container's
configured cgroup might not be available.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 94133fab97)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Kir Kolyshkin