nametransform: check name validity on encryption

xfstests generic/523 discovered that we allowed to set
xattrs with "/" in the name, but did not allow to read
them later.

With this change we do not allow to set them in the first
place.

1 files changed, 4 insertions, 1 deletions

diff --git a/internal/nametransform/diriv.go b/internal/nametransform/diriv.go
index b2f165b..1d27aa5 100644
--- a/internal/nametransform/diriv.go
+++ b/internal/nametransform/diriv.go
@@ -102,7 +102,10 @@ func (be *NameTransform) EncryptAndHashName(name string, iv []byte) (string, err
 	if len(name) > NameMax {
 		return "", syscall.ENAMETOOLONG
 	}
-	cName := be.EncryptName(name, iv)
+	cName, err := be.EncryptName(name, iv)
+	if err != nil {
+		return "", err
+	}
 	if be.longNames && len(cName) > NameMax {
 		return be.HashLongName(cName), nil
 	}