fix: preserve modTime for DeleteMarker on remote disks (#9905)

cmd/xl-storage-format-v2.go

@@ -18,6 +18,7 @@ package cmd
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"strings"
 	"time"
@@ -230,13 +231,17 @@ func (z *xlMetaV2) AddVersion(fi FileInfo) error {
 		if err != nil {
 			return err
 		}
-		z.Versions = append(z.Versions, xlMetaV2Version{
+		v := xlMetaV2Version{
 			Type: DeleteType,
 			DeleteMarker: &xlMetaV2DeleteMarker{
 				VersionID: uv,
 				ModTime:   fi.ModTime.UnixNano(),
 			},
-		})
+		}
+		if !v.Valid() {
+			return errors.New("internal error: invalid version entry generated")
+		}
+		z.Versions = append(z.Versions, v)
 		return nil
 	}
 
@@ -305,6 +310,10 @@ func (z *xlMetaV2) AddVersion(fi FileInfo) error {
 		}
 	}
 
+	if !ventry.Valid() {
+		return errors.New("internal error: invalid version entry generated")
+	}
+
 	for i, version := range z.Versions {
 		if !version.Valid() {
 			return errFileCorrupt