From 2150be1a9be0a333dbdb9759d8dd98905d987828 Mon Sep 17 00:00:00 2001 From: "Bryan C. Mills" Date: Thu, 31 Mar 2022 16:51:32 -0400 Subject: [release-branch.go1.17] syscall: relax output check in TestGroupCleanupUserNamespace MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit “If you have a procedure with ten parameters, you probably missed some.” ― attr. Alan J. Perlis I argue that the same is true for hard-coded special cases. In TestGroupCleanupUserNamespace, instead of a curated list of strings observed in the wild we now check for a prefix, as was done for TestGroupCleanup in CL 24670. Updates #52088. Fixes #52148. Change-Id: I59c5b0c048113e306996c0f8247e09c714d2423a Reviewed-on: https://go-review.googlesource.com/c/go/+/397316 Trust: Bryan Mills Run-TryBot: Bryan Mills TryBot-Result: Gopher Robot Reviewed-by: Ian Lance Taylor (cherry picked from commit 434b2a5d0dbdfdce6327beb06ca03c02b3fd2785) Reviewed-on: https://go-review.googlesource.com/c/go/+/398235 Reviewed-by: Ian Lance Taylor --- src/syscall/exec_linux_test.go | 25 +++++++++---------------- 1 file changed, 9 insertions(+), 16 deletions(-) diff --git a/src/syscall/exec_linux_test.go b/src/syscall/exec_linux_test.go index 85b59ad00d..d62b80b017 100644 --- a/src/syscall/exec_linux_test.go +++ b/src/syscall/exec_linux_test.go @@ -275,12 +275,14 @@ func TestGroupCleanup(t *testing.T) { t.Fatalf("Cmd failed with err %v, output: %s", err, out) } strOut := strings.TrimSpace(string(out)) + t.Logf("id: %s", strOut) + expected := "uid=0(root) gid=0(root)" // Just check prefix because some distros reportedly output a // context parameter; see https://golang.org/issue/16224. // Alpine does not output groups; see https://golang.org/issue/19938. if !strings.HasPrefix(strOut, expected) { - t.Errorf("id command output: %q, expected prefix: %q", strOut, expected) + t.Errorf("expected prefix: %q", expected) } } @@ -309,23 +311,14 @@ func TestGroupCleanupUserNamespace(t *testing.T) { t.Fatalf("Cmd failed with err %v, output: %s", err, out) } strOut := strings.TrimSpace(string(out)) + t.Logf("id: %s", strOut) - // Strings we've seen in the wild. - expected := []string{ - "uid=0(root) gid=0(root) groups=0(root)", - "uid=0(root) gid=0(root) groups=0(root),65534(nobody)", - "uid=0(root) gid=0(root) groups=0(root),65534(nogroup)", - "uid=0(root) gid=0(root) groups=0(root),65534", - "uid=0(root) gid=0(root) groups=0(root),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody)", // Alpine; see https://golang.org/issue/19938 - "uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023", // CentOS with SELinux context, see https://golang.org/issue/34547 - "uid=0(root) gid=0(root) groups=0(root),65534(nobody) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023", // Fedora with SElinux context, see https://golang.org/issue/46752 - } - for _, e := range expected { - if strOut == e { - return - } + // As in TestGroupCleanup, just check prefix. + // The actual groups and contexts seem to vary from one distro to the next. + expected := "uid=0(root) gid=0(root) groups=0(root)" + if !strings.HasPrefix(strOut, expected) { + t.Errorf("expected prefix: %q", expected) } - t.Errorf("id command output: %q, expected one of %q", strOut, expected) } // TestUnshareHelperProcess isn't a real test. It's used as a helper process -- cgit v1.2.3-54-g00ecf