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path: root/libpod/networking_linux.go
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* podman stats: work with network connect/disconnectPaul Holzinger2022-05-31
| | | | | | | | | | | | | | | | | Hardcoding the interface name is a bad idea. We have no control over the actual interface name since the user can change it. The correct thing is to read them from the network status. Since the contianer can have more than one interface we have to add the RX/TX values. The other values are currently not used. For podman 5.0 we should change it so that the API can return the statistics per interface and the client should sum the TX/RX for the command output. This is what docker is doing. Fixes #13824 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* Use containers/common/pkg/util.StringToSliceDaniel J Walsh2022-05-23
| | | | | | [NO NEW TESTS NEEDED] Just code cleanup for better reuse Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
* enable errcheck linterPaul Holzinger2022-04-29
| | | | | | | | The errcheck linter makes sure that errors are always check and not ignored by accident. It spotted a lot of unchecked errors, mostly in the tests but also some real problem in the code. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* enable gocritic linterPaul Holzinger2022-04-26
| | | | | | | | | | | | | | | | | | | | | | The linter ensures a common code style. - use switch/case instead of else if - use if instead of switch/case for single case statement - add space between comment and text - detect the use of defer with os.Exit() - use short form var += "..." instead of var = var + "..." - detect problems with append() ``` newSlice := append(orgSlice, val) ``` This could lead to nasty bugs because the orgSlice will be changed in place if it has enough capacity too hold the new elements. Thus we newSlice might not be a copy. Of course most of the changes are just cosmetic and do not cause any logic errors but I think it is a good idea to enforce a common style. This should help maintainability. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* Implements Windows volume/mount supportJason T. Greene2022-04-25
| | | | | | | Based on WSL2 9p support: remaps windows paths to /mnt/<drive> locations for both podman and Docker API clients. Signed-off-by: Jason T. Greene <jason.greene@redhat.com>
* Update to use new common machine APIJason T. Greene2022-04-25
| | | | Signed-off-by: Jason T. Greene <jason.greene@redhat.com>
* Merge pull request #13978 from Luap99/unparamOpenShift Merge Robot2022-04-25
|\ | | | | enable unparam linter
| * enable unparam linterPaul Holzinger2022-04-25
| | | | | | | | | | | | | | The unparam linter is useful to detect unused function parameters and return values. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* | libpod/networking_linux.go: switch to sha256 hashesLokesh Mandvekar2022-04-22
|/ | | | | | | | | | | | | SHA-1 is prone to collisions. This will likely break connectivity between old containers started before update and containers started after update. It will also fail to cleanup old netns. A reboot will fix this, so a reboot is recommended after update. [NO NEW TESTS NEEDED] Signed-off-by: Lokesh Mandvekar <lsm5@fedoraproject.org>
* network dis-/connect: update /etc/hostsPaul Holzinger2022-04-22
| | | | | | | | | | | When we connect or disconnect from a network we also have to update /etc/hosts to ensure we only have valid entries in there. This also fixes problems with docker-compose since this makes use of network connect/disconnect. Fixes #12533 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* rootless netns: move process to scope only with systemdPaul Holzinger2022-03-30
| | | | | | | | | | | When you run podman on a non systemd system we should not try to move the process under a new systemd scope. [NO NEW TESTS NEEDED] Ref #13703 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* Remove error stutterDaniel J Walsh2022-03-25
| | | | | | | | | | | | | | | | | When podman gets an error it prints out "Error: " before printing the error string. If the error message starts with error, we end up with Error: error ... This PR Removes all of these stutters. logrus.Error() also prints out that this is an error, so no need for the error stutter. [NO NEW TESTS NEEDED] Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
* linter: enable makezeroValentin Rothberg2022-03-22
| | | | Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>
* go fmt: use go 1.18 conditional-build syntaxValentin Rothberg2022-03-18
| | | | Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>
* Inspect network info of a joined network namespace😎 Mostafa Emami2022-03-08
| | | | | Closes: https://github.com/containers/podman/issues/13150 Signed-off-by: 😎 Mostafa Emami <mustafaemami@gmail.com>
* Remove the runtime lockMatthew Heon2022-02-22
| | | | | | | | | | | | | | | | This primarily served to protect us against shutting down the Libpod runtime while operations (like creating a container) were happening. However, it was very inconsistently implemented (a lot of our longer-lived functions, like pulling images, just didn't implement it at all...) and I'm not sure how much we really care about this very-specific error case? Removing it also removes a lot of potential deadlocks, which is nice. [NO NEW TESTS NEEDED] Signed-off-by: Matthew Heon <mheon@redhat.com>
* Modify /etc/resolv.conf when connecting/disconnectingMatthew Heon2022-02-10
| | | | | | | | | | | | | | | | | | The `podman network connect` and `podman network disconnect` commands give containers access to different networks than the ones they were created with; these networks can also have DNS servers associated with them. Until now, however, we did not modify resolv.conf as network membership changed. With this PR, `podman network connect` will add any new nameservers supported by the new network to the container's /etc/resolv.conf, and `podman network disconnect` command will do the opposite, removing the network's nameservers from `/etc/resolv.conf`. Fixes #9603 Signed-off-by: Matthew Heon <matthew.heon@pm.me>
* move rootless netns slirp4netns process to systemd user.slicePaul Holzinger2022-02-07
| | | | | | | | | | | | | When running podman inside systemd user units, it is possible that systemd kills the rootless netns slirp4netns process because it was started in the default unit cgroup. When the unit is stopped all processes in that cgroup are killed. Since the slirp4netns process is run once for all containers it should not be killed. To make sure systemd will not kill the process we move it to the user.slice. Fixes #13153 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* libpod: report slirp4netns network statsGiuseppe Scrivano2022-02-01
| | | | | | | | | by default slirp4netns uses the tap0 device. When slirp4netns is used, use that device by default instead of eth0. Closes: https://github.com/containers/podman/issues/11695 Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* container create: do not check for network dns supportPaul Holzinger2022-01-24
| | | | | | | | | | | We should not check if the network supports dns when we create a container with network aliases. This could be the case for containers created by docker-compose for example if the dnsname plugin is not installed or the user uses a macvlan config where we do not support dns. Fixes #12972 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* bump go module to version 4Valentin Rothberg2022-01-18
| | | | | | | | | | | | | Automated for .go files via gomove [1]: `gomove github.com/containers/podman/v3 github.com/containers/podman/v4` Remaining files via vgrep [2]: `vgrep github.com/containers/podman/v3` [1] https://github.com/KSubedi/gomove [2] https://github.com/vrothberg/vgrep Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
* use netns package from c/commonPaul Holzinger2022-01-12
| | | | | | | The netns package was moved to c/common so we should use this and remove the package from podman. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* use libnetwork from c/commonPaul Holzinger2022-01-12
| | | | | | | | The libpod/network packages were moved to c/common so that buildah can use it as well. To prevent duplication use it in podman as well and remove it from here. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* network connect allow ip, ipv6 and mac addressPaul Holzinger2021-12-14
| | | | | | | | | Network connect now supports setting a static ipv4, ipv6 and mac address for the container network. The options are added to the cli and api. Fixes #9883 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* network db rewrite: migrate existing settingsPaul Holzinger2021-12-14
| | | | | | | | | | | | | | The new network db structure stores everything in the networks bucket. Previously some network settings were not written the the network bucket and only stored in the container config. Instead of the old format which used the container ID as value in the networks buckets we now use the PerNetworkoptions struct there. To migrate existing users we use the state.GetNetworks() function. If it fails to read the new format it will automatically migrate the old config format to the new one. This is allows a flawless migration path. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* rootless netns: resolve all path components for resolv.confPaul Holzinger2021-12-06
| | | | | | | | | | | | | | | | | We need to follow all symlinks in the /etc/resolv.conf path. Currently we would only check the last file but it is possible that any directory before that is also a link. Unfortunately this code is very hard to maintain and not well tested. I will try to come up with a unit test when I have more time. I think we could utilize some for of chroot for this. For now we are stucked with the default setup in the fedora/ubunutu test VMs. [NO NEW TESTS NEEDED] Fixes #12461 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* Fix possible rootless netns cleanup racePaul Holzinger2021-12-01
| | | | | | | | | | | | | | | | | | | | | | rootlessNetNS.Cleanup() has an issue with how it detects if cleanup is needed, reading the container state is not good ebough because containers are first stopped and than cleanup will be called. So at one time two containers could wait for cleanup but the second one will fail because the first one triggered already the cleanup thus making rootless netns unavailable for the second container resulting in an teardown error. Instead of checking the container state we need to check the netns state. Secondly, podman unshare --rootless-netns should not do the cleanup. This causes more issues than it is worth fixing. Users also might want to use this to setup the namespace in a special way. If unshare also cleans this up right away we cannot do this. [NO NEW TESTS NEEDED] Fixes #12459 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* Merge pull request #12174 from ↵OpenShift Merge Robot2021-11-19
|\ | | | | | | | | fgimenez/fix-docker-networksettings-type-discrepancy Introduces Address type to be used in secondary IPv4 and IPv6 inspect data structure
| * Introduce Address type to be used in secondary IPv4 and IPv6 inspect dataFederico Gimenez2021-11-18
| | | | | | | | | | | | | | | | | | | | | | | | structure. Resolves a discrepancy between the types used in inspect for docker and podman. This causes a panic when using the docker client against podman when the secondary IP fields in the `NetworkSettings` inspect field are populated. Fixes containers#12165 Signed-off-by: Federico Gimenez <fgimenez@redhat.com>
* | rootless netns, one netns per libpod tmp dirPaul Holzinger2021-11-18
|/ | | | | | | | | | | | | | | | The netns cleanup code is checking if there are running containers, this can fail if you run several libpod instances with diffrent root/runroot. To fix it we use one netns for each libpod instances. To prevent name conflicts we use a hash from the static dir as part of the name. Previously this worked because we would use the CNI files to check if the netns was still in use. but this is no longer possible with netavark. [NO NEW TESTS NEEDED] Fixes #12306 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* rename libpod nettypes fieldsPaul Holzinger2021-11-16
| | | | | | | | | | Some field names are confusing. Change them so that they make more sense to the reader. Since these fields are only in the main branch we can safely rename them without worrying about backwards compatibility. Note we have to change the field names in netavark too. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* podman machine improve port forwardingPaul Holzinger2021-11-15
| | | | | | | | | | | | | | | | | | | | | | | | This commits adds port forwarding logic directly into podman. The podman-machine cni plugin is no longer needed. The following new features are supported: - works with cni, netavark and slirp4netns - ports can use the hostIP to bind instead of hard coding 0.0.0.0 - gvproxy no longer listens on 0.0.0.0:7777 (requires a new gvproxy version) - support the udp protocol With this we no longer need podman-machine-cni and should remove it from the packaging. There is also a change to make sure we are backwards compatible with old config which include this plugin. Fixes #11528 Fixes #11728 [NO NEW TESTS NEEDED] We have no podman machine test at the moment. Please test this manually on your system. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* Fix rootless networking with userns and portsPaul Holzinger2021-11-09
| | | | | | | | A rootless container created with a custom userns and forwarded ports did not work. I refactored the network setup to make the setup logic more clear. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* Merge pull request #11890 from Luap99/portsOpenShift Merge Robot2021-11-06
|\ | | | | libpod: deduplicate ports in db
| * libpod: deduplicate ports in dbPaul Holzinger2021-10-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The OCICNI port format has one big problem: It does not support ranges. So if a users forwards a range of 1k ports with podman run -p 1001-2000 we have to store each of the thousand ports individually as array element. This bloats the db and makes the JSON encoding and decoding much slower. In many places we already use a better port struct type which supports ranges, e.g. `pkg/specgen` or the new network interface. Because of this we have to do many runtime conversions between the two port formats. If everything uses the new format we can skip the runtime conversions. This commit adds logic to replace all occurrences of the old format with the new one. The database will automatically migrate the ports to new format when the container config is read for the first time after the update. The `ParsePortMapping` function is `pkg/specgen/generate` has been reworked to better work with the new format. The new logic is able to deduplicate the given ports. This is necessary the ensure we store them efficiently in the DB. The new code should also be more performant than the old one. To prove that the code is fast enough I added go benchmarks. Parsing 1 million ports took less than 0.5 seconds on my laptop. Benchmark normalize PortMappings in specgen: Please note that the 1 million ports are actually 20x 50k ranges because we cannot have bigger ranges than 65535 ports. ``` $ go test -bench=. -benchmem ./pkg/specgen/generate/ goos: linux goarch: amd64 pkg: github.com/containers/podman/v3/pkg/specgen/generate cpu: Intel(R) Core(TM) i7-10850H CPU @ 2.70GHz BenchmarkParsePortMappingNoPorts-12 480821532 2.230 ns/op 0 B/op 0 allocs/op BenchmarkParsePortMapping1-12 38972 30183 ns/op 131584 B/op 9 allocs/op BenchmarkParsePortMapping100-12 18752 60688 ns/op 141088 B/op 315 allocs/op BenchmarkParsePortMapping1k-12 3104 331719 ns/op 223840 B/op 3018 allocs/op BenchmarkParsePortMapping10k-12 376 3122930 ns/op 1223650 B/op 30027 allocs/op BenchmarkParsePortMapping1m-12 3 390869926 ns/op 124593840 B/op 4000624 allocs/op BenchmarkParsePortMappingReverse100-12 18940 63414 ns/op 141088 B/op 315 allocs/op BenchmarkParsePortMappingReverse1k-12 3015 362500 ns/op 223841 B/op 3018 allocs/op BenchmarkParsePortMappingReverse10k-12 343 3318135 ns/op 1223650 B/op 30027 allocs/op BenchmarkParsePortMappingReverse1m-12 3 403392469 ns/op 124593840 B/op 4000624 allocs/op BenchmarkParsePortMappingRange1-12 37635 28756 ns/op 131584 B/op 9 allocs/op BenchmarkParsePortMappingRange100-12 39604 28935 ns/op 131584 B/op 9 allocs/op BenchmarkParsePortMappingRange1k-12 38384 29921 ns/op 131584 B/op 9 allocs/op BenchmarkParsePortMappingRange10k-12 29479 40381 ns/op 131584 B/op 9 allocs/op BenchmarkParsePortMappingRange1m-12 927 1279369 ns/op 143022 B/op 164 allocs/op PASS ok github.com/containers/podman/v3/pkg/specgen/generate 25.492s ``` Benchmark convert old port format to new one: ``` go test -bench=. -benchmem ./libpod/ goos: linux goarch: amd64 pkg: github.com/containers/podman/v3/libpod cpu: Intel(R) Core(TM) i7-10850H CPU @ 2.70GHz Benchmark_ocicniPortsToNetTypesPortsNoPorts-12 663526126 1.663 ns/op 0 B/op 0 allocs/op Benchmark_ocicniPortsToNetTypesPorts1-12 7858082 141.9 ns/op 72 B/op 2 allocs/op Benchmark_ocicniPortsToNetTypesPorts10-12 2065347 571.0 ns/op 536 B/op 4 allocs/op Benchmark_ocicniPortsToNetTypesPorts100-12 138478 8641 ns/op 4216 B/op 4 allocs/op Benchmark_ocicniPortsToNetTypesPorts1k-12 9414 120964 ns/op 41080 B/op 4 allocs/op Benchmark_ocicniPortsToNetTypesPorts10k-12 781 1490526 ns/op 401528 B/op 4 allocs/op Benchmark_ocicniPortsToNetTypesPorts1m-12 4 250579010 ns/op 40001656 B/op 4 allocs/op PASS ok github.com/containers/podman/v3/libpod 11.727s ``` Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* | rename rootless cni ns to rootless netnsPaul Holzinger2021-11-05
| | | | | | | | | | | | | | | | | | | | | | | | Since we want to use the rootless cni ns also for netavark we should pick a more generic name. The name is now "rootless network namespace" or short "rootless netns". The rename might cause some issues after the update but when the all containers are restarted or the host is rebooted it should work correctly. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* | mount full XDG_RUNTIME_DIR in rootless cni nsPaul Holzinger2021-11-05
| | | | | | | | | | | | | | We should mount the full runtime directory into the namespace instead of just the netns dir. This allows more use cases. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* | Fix rootless cni netns cleanup logicPaul Holzinger2021-11-05
|/ | | | | | | | | | | | | | The check if cleanup is needed reads all container and checks if there are running containers with bridge networking. If we do not find any we have to cleanup the ns. However there was a problem with this because the state is empty by default so the running check never worked. Fortunately the was a second check which relies on the CNI files so we still did cleanup anyway. With netavark I noticed that this check is broken because the CNI files were not present. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* move network alias validation to container createPaul Holzinger2021-09-28
| | | | | | | | | | Podman 4.0 currently errors when you use network aliases for a network which has dns disabled. Because the error happens on network setup this can cause regression for old working containers. The network backend should not validate this. Instead podman should check this at container create time and also for network connect. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* always add short container id as net aliasPaul Holzinger2021-09-28
| | | | | | | | | | | | | | | | This matches what docker does. Also make sure the net aliases are also shown when the container is stopped. docker-compose uses this special alias entry to check if it is already correctly connected to the network. [1] Because we do not support static ips on network connect at the moment calling disconnect && connect will loose the static ip. Fixes #11748 [1] https://github.com/docker/compose/blob/0bea52b18dda3de8c28fcfb0c80cc08b8950645e/compose/service.py#L663-L667 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* standardize logrus messages to upper caseDaniel J Walsh2021-09-22
| | | | | | | | Remove ERROR: Error stutter from logrus messages also. [ NO TESTS NEEDED] This is just code cleanup. Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
* Drop OCICNI dependencyPaul Holzinger2021-09-15
| | | | | | | | | | | We do not use the ocicni code anymore so let's get rid of it. Only the port struct is used but we can copy this into libpod network types so we can debloat the binary. The next step is to remove the OCICNI port mapping form the container config and use the better PortMapping struct everywhere. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* Wire network interface into libpodPaul Holzinger2021-09-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make use of the new network interface in libpod. This commit contains several breaking changes: - podman network create only outputs the new network name and not file path. - podman network ls shows the network driver instead of the cni version and plugins. - podman network inspect outputs the new network struct and not the cni conflist. - The bindings and libpod api endpoints have been changed to use the new network structure. The container network status is stored in a new field in the state. The status should be received with the new `c.getNetworkStatus`. This will migrate the old status to the new format. Therefore old containers should contine to work correctly in all cases even when network connect/ disconnect is used. New features: - podman network reload keeps the ip and mac for more than one network. - podman container restore keeps the ip and mac for more than one network. - The network create compat endpoint can now use more than one ipam config. The man pages and the swagger doc are updated to reflect the latest changes. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* fix restart always with rootlessportPaul Holzinger2021-09-13
| | | | | | | | When a container is automatically restarted due its restart policy and the container uses rootless cni networking with ports forwarded we have to start a new rootlessport process since it exits with conmon. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* rootless cni: resolve absolute symlinks correctlyPaul Holzinger2021-08-30
| | | | | | | | | | | When /etc/resolv.conf is a symlink to an absolute path use it and not join it the the previous path. [NO TESTS NEEDED] This depends on the host layout. Fixes #11358 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* InfraContainer Reworkcdoern2021-08-26
| | | | | | | | | | InfraContainer should go through the same creation process as regular containers. This change was from the cmd level down, involving new container CLI opts and specgen creating functions. What now happens is that both container and pod cli options are populated in cmd and used to create a podSpecgen and a containerSpecgen. The process then goes as follows FillOutSpecGen (infra) -> MapSpec (podOpts -> infraOpts) -> PodCreate -> MakePod -> createPodOptions -> NewPod -> CompleteSpec (infra) -> MakeContainer -> NewContainer -> newContainer -> AddInfra (to pod state) Signed-off-by: cdoern <cdoern@redhat.com>
* podman inspect show exposed portsPaul Holzinger2021-08-24
| | | | | | | | | | | | | | Podman inspect has to show exposed ports to match docker. This requires storing the exposed ports in the container config. A exposed port is shown as `"80/tcp": null` while a forwarded port is shown as `"80/tcp": [{"HostIp": "", "HostPort": "8080" }]`. Also make sure to add the exposed ports to the new image when the container is commited. Fixes #10777 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* Fix rootless cni dns without systemd stub resolverPaul Holzinger2021-08-16
| | | | | | | | | | | | | | | | | When a host uses systemd-resolved but not the resolved stub resolver the following symlinks are created: `/etc/resolv.conf` -> `/run/systemd/resolve/stub-resolv.conf` -> `/run/systemd/resolve/resolv.conf`. Because the code uses filepath.EvalSymlinks we put the new resolv.conf to `/run/systemd/resolve/resolv.conf` but the `/run/systemd/resolve/stub-resolv.conf` link does not exists in the mount ns. To fix this we will walk the symlinks manually until we reach the first one under `/run` and use this for the resolv.conf file destination. This fixes a regression which was introduced in e73d4829900c. Fixes #11222 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
* Run codespell to fix spellingDaniel J Walsh2021-08-11
| | | | | | [NO TESTS NEEDED] Just fixing spelling. Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
* fix rootless port forwarding with network dis-/connectPaul Holzinger2021-08-03
| | | | | | | | | | | | | | | | | | | | | | | | The rootlessport forwarder requires a child IP to be set. This must be a valid ip in the container network namespace. The problem is that after a network disconnect and connect the eth0 ip changed. Therefore the packages are dropped since the source ip does no longer exists in the netns. One solution is to set the child IP to 127.0.0.1, however this is a security problem. [1] To fix this we have to recreate the ports after network connect and disconnect. To make this work the rootlessport process exposes a socket where podman network connect/disconnect connect to and send to new child IP to rootlessport. The rootlessport process will remove all ports and recreate them with the new correct child IP. Also bump rootlesskit to v0.14.3 to fix a race with RemovePort(). Fixes #10052 [1] https://nvd.nist.gov/vuln/detail/CVE-2021-20199 Signed-off-by: Paul Holzinger <pholzing@redhat.com>
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