sub timeout for fs init

src/host/vfs/resolver.go

@@ -119,17 +119,26 @@ func (r *ResolverFS) ReadDir(ctx context.Context, dir string) ([]fs.DirEntry, er
 				return nil, err
 			}
 			defer file.Close(ctx)
-			nestedfs, err := r.resolver.nestedFs(ctx, filepath, file)
-			if err != nil {
-				if errors.Is(err, context.DeadlineExceeded) {
-					r.log.ErrorContext(ctx, "creating fs timed out", "filename", e.Name())
-					continue
-				}
 
+			err = func() error {
+				factoryCtx, cancel := subTimeout(ctx)
+				defer cancel()
+				nestedfs, err := r.resolver.nestedFs(factoryCtx, filepath, file)
+				if err != nil {
+					if errors.Is(err, context.DeadlineExceeded) {
+						r.log.ErrorContext(ctx, "creating fs timed out", "filename", e.Name())
+						return nil
+					}
+
+					return err
+				}
+				out = append(out, nestedfs)
+				return nil
+			}()
+			if err != nil {
 				return nil, err
 			}
 
-			out = append(out, nestedfs)
 		} else {
 			out = append(out, e)
 		}