mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-07-25 12:43:23 +00:00
f3cdfc488e
runc rc95 contains a fix for CVE-2021-30465. runc rc94 provides fixes and improvements. One notable change is cgroup manager's Set now accept Resources rather than Cgroup (see https://github.com/opencontainers/runc/pull/2906). Modify the code accordingly. Also update runc dependencies (as hinted by hack/lint-depdendencies.sh): github.com/cilium/ebpf v0.5.0 github.com/containerd/console v1.0.2 github.com/coreos/go-systemd/v22 v22.3.1 github.com/godbus/dbus/v5 v5.0.4 github.com/moby/sys/mountinfo v0.4.1 golang.org/x/sys v0.0.0-20210426230700-d19ff857e887 github.com/google/go-cmp v0.5.4 github.com/kr/pretty v0.2.1 github.com/opencontainers/runtime-spec v1.0.3-0.20210326190908-1c3f411f0417 Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
38 lines
848 B
Go
38 lines
848 B
Go
package userns
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"github.com/opencontainers/runc/libcontainer/user"
|
|
)
|
|
|
|
var (
|
|
inUserNS bool
|
|
nsOnce sync.Once
|
|
)
|
|
|
|
// runningInUserNS detects whether we are currently running in a user namespace.
|
|
// Originally copied from github.com/lxc/lxd/shared/util.go
|
|
func runningInUserNS() bool {
|
|
nsOnce.Do(func() {
|
|
uidmap, err := user.CurrentProcessUIDMap()
|
|
if err != nil {
|
|
// This kernel-provided file only exists if user namespaces are supported
|
|
return
|
|
}
|
|
inUserNS = uidMapInUserNS(uidmap)
|
|
})
|
|
return inUserNS
|
|
}
|
|
|
|
func uidMapInUserNS(uidmap []user.IDMap) bool {
|
|
/*
|
|
* We assume we are in the initial user namespace if we have a full
|
|
* range - 4294967295 uids starting at uid 0.
|
|
*/
|
|
if len(uidmap) == 1 && uidmap[0].ID == 0 && uidmap[0].ParentID == 0 && uidmap[0].Count == 4294967295 {
|
|
return false
|
|
}
|
|
return true
|
|
}
|