Fixes from mount move testing

changelog/mount-migration.txt

@@ -0,0 +1,3 @@
+```release-note:feature
+**Mount Migration**: Vault supports moving secrets and auth mounts both within and across namespaces.
+```

vault/logical_system.go

@@ -1201,6 +1201,13 @@ func (b *SystemBackend) handleRemount(ctx context.Context, req *logical.Request,
 			logical.ErrInvalidRequest
 	}
 
+	if strings.Contains(fromPath, " ") {
+		return logical.ErrorResponse("'from' path cannot contain whitespace"), logical.ErrInvalidRequest
+	}
+	if strings.Contains(toPath, " ") {
+		return logical.ErrorResponse("'to' path cannot contain whitespace"), logical.ErrInvalidRequest
+	}
+
 	fromPathDetails := b.Core.splitNamespaceAndMountFromPath(ns.Path, fromPath)
 	toPathDetails := b.Core.splitNamespaceAndMountFromPath(ns.Path, toPath)
 

vault/logical_system_test.go

@@ -995,6 +995,38 @@ func TestSystemBackend_remount_nonPrintable(t *testing.T) {
 	}
 }
 
+func TestSystemBackend_remount_spacesInFromPath(t *testing.T) {
+	b := testSystemBackend(t)
+
+	req := logical.TestRequest(t, logical.UpdateOperation, "remount")
+	req.Data["from"] = " foo / "
+	req.Data["to"] = "bar"
+	req.Data["config"] = structs.Map(MountConfig{})
+	resp, err := b.HandleRequest(namespace.RootContext(nil), req)
+	if err != logical.ErrInvalidRequest {
+		t.Fatalf("err: %v", err)
+	}
+	if resp.Data["error"] != `'from' path cannot contain whitespace` {
+		t.Fatalf("bad: %v", resp)
+	}
+}
+
+func TestSystemBackend_remount_spacesInToPath(t *testing.T) {
+	b := testSystemBackend(t)
+
+	req := logical.TestRequest(t, logical.UpdateOperation, "remount")
+	req.Data["from"] = "foo"
+	req.Data["to"] = " bar / "
+	req.Data["config"] = structs.Map(MountConfig{})
+	resp, err := b.HandleRequest(namespace.RootContext(nil), req)
+	if err != logical.ErrInvalidRequest {
+		t.Fatalf("err: %v", err)
+	}
+	if resp.Data["error"] != `'to' path cannot contain whitespace` {
+		t.Fatalf("bad: %v", resp)
+	}
+}
+
 func TestSystemBackend_leases(t *testing.T) {
 	core, b, root := testCoreSystemBackend(t)
 

website/content/docs/commands/auth/move.mdx

@@ -25,7 +25,7 @@ method.**
 Move the existing auth method at ns1/approle/ to ns2/new-approle/:
 
 ```shell-session
-$ vault auth move ns1/approle/ ns2/new-approle/
+$ vault auth move ns1/auth/approle/ ns2/auth/new-approle/
 ```
 
 ## Usage