manifest: fix manifest push error on cross-registry

fix manifest push error on cross-registry

Signed-off-by: ChengyuZhu6 <hudson@cyzhu.com>

Author: ChengyuZhu6

cmd/nerdctl/manifest/manifest_push_linux_test.go

@@ -118,6 +118,29 @@ func TestManifestPush(t *testing.T) {
 					"output": expectedDigest,
 				}),
 			},
+			{
+				Description: "reject-cross-registry-sources",
+				Require:     require.Not(nerdtest.Docker),
+				Setup: func(data test.Data, helpers test.Helpers) {
+					targetRef := fmt.Sprintf("%s:%d/%s",
+						registryTokenAuthHTTPSRandom.IP.String(), registryTokenAuthHTTPSRandom.Port, "test-list-push:v1")
+					helpers.Ensure("manifest", "create", "--insecure", targetRef+"-cross", manifestRef)
+				},
+				Command: func(data test.Data, helpers test.Helpers) test.TestableCommand {
+					targetRef := fmt.Sprintf("%s:%d/%s",
+						registryTokenAuthHTTPSRandom.IP.String(), registryTokenAuthHTTPSRandom.Port, "test-list-push:v1")
+					return helpers.Command("manifest", "push", "--insecure", targetRef+"-cross")
+				},
+				Expected: func(data test.Data, helpers test.Helpers) *test.Expected {
+					return &test.Expected{
+						ExitCode: 1,
+						Errors:   []error{errors.New(data.Labels().Get("error"))},
+					}
+				},
+				Data: test.WithLabels(map[string]string{
+					"error": "cannot use source images from a different registry than the target image:",
+				}),
+			},
 		},
 	}
 	testCase.Run(t)

pkg/cmd/manifest/push.go

@@ -135,6 +135,10 @@ func pushIndividualManifests(ctx context.Context, resolver remotes.Resolver, man
 			return fmt.Errorf("failed to parse manifest reference %s: %w", manifest.Ref, err)
 		}
 
+		if manifestRef.Domain != targetDomain {
+			return fmt.Errorf("cannot use source images from a different registry than the target image: %s != %s", manifestRef.Domain, targetDomain)
+		}
+
 		var targetManifestRef string
 		if manifestRef.Domain != targetDomain {
 			targetManifestRef = fmt.Sprintf("%s/%s@%s", targetDomain, manifestRef.Path, manifest.Descriptor.Digest)