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[release-branch.go1.22] syscall: skip TestAmbientCapsUserns when restricted, document

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For #67088
Fixes #69366

Change-Id: I42e7a8d02b161187772f147e3e136ab6e0f71d7f
Reviewed-on: https://go-review.googlesource.com/c/go/+/585059
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
(cherry picked from commit d05af626956af449fb13815cef06b606bc7740c6)
Reviewed-on: https://go-review.googlesource.com/c/go/+/612475
This commit is contained in:
Michael Stapelberg 2024-05-14 10:54:40 +02:00 committed by Tim King
parent 6fab4b9a9e
commit b4086b7c16
2 changed files with 8 additions and 0 deletions
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4
src/syscall/exec_linux.go
View File

@ -53,6 +53,10 @@ const (
// SysProcIDMap holds Container ID to Host ID mappings used for User Namespaces in Linux.
// See user_namespaces(7).
//
// Note that User Namespaces are not available on a number of popular Linux
// versions (due to security issues), or are available but subject to AppArmor
// restrictions like in Ubuntu 24.04.
type SysProcIDMap struct {
ContainerID int // Container ID.
HostID int // Host ID.

4
src/syscall/exec_linux_test.go
View File

@ -642,6 +642,10 @@ func TestAmbientCaps(t *testing.T) {
}
func TestAmbientCapsUserns(t *testing.T) {
b, err := os.ReadFile("/proc/sys/kernel/apparmor_restrict_unprivileged_userns")
if err == nil && strings.TrimSpace(string(b)) == "1" {
t.Skip("AppArmor restriction for unprivileged user namespaces is enabled")
}
testAmbientCaps(t, true)
}