syscall: update check for UserNS support for centos 7
Fixes #20796
Fixes #16283
Change-Id: Ib11992fbd2bc1fbb3b14ae5a6bf0da2e4c12f641
Reviewed-on: https://go-review.googlesource.com/49311
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/src/syscall/exec_linux_test.go b/src/syscall/exec_linux_test.go
index 5c7d8a2..114deec 100644
--- a/src/syscall/exec_linux_test.go
+++ b/src/syscall/exec_linux_test.go
@@ -57,6 +57,14 @@
t.Skip("kernel prohibits user namespace in unprivileged process")
}
}
+ // On Centos 7 make sure they set the kernel parameter user_namespace=1
+ // See issue 16283 and 20796.
+ if _, err := os.Stat("/sys/module/user_namespace/parameters/enable"); err == nil {
+ buf, _ := ioutil.ReadFile("/sys/module/user_namespace/parameters/enabled")
+ if !strings.HasPrefix(string(buf), "Y") {
+ t.Skip("kernel doesn't support user namespaces")
+ }
+ }
// When running under the Go continuous build, skip tests for
// now when under Kubernetes. (where things are root but not quite)
// Both of these are our own environment variables.
