diff --git a/assets b/assets
index da7a3a3..dd539f6 160000
--- a/assets
+++ b/assets
@@ -1 +1 @@
-Subproject commit da7a3a38bf924d53072a7c56d144b0e777ea0511
+Subproject commit dd539f606a1dc7d48a2e745892abef6bbe99405c
diff --git a/models/file.go b/models/file.go
index 171c94c..d377641 100644
--- a/models/file.go
+++ b/models/file.go
@@ -225,17 +225,17 @@ func DeleteFiles(files []*File, uid uint) error {
 		}
 
 		result := tx.Unscoped().Where("size = ?", file.Size).Delete(file)
+		if result.Error != nil {
+			tx.Rollback()
+			return result.Error
+		}
+
 		if result.RowsAffected == 0 {
 			tx.Rollback()
 			return errors.New("file size is dirty")
 		}
 
 		size += file.Size
-
-		if result.Error != nil {
-			tx.Rollback()
-			return result.Error
-		}
 	}
 
 	if err := user.ChangeStorage(tx, "-", size); err != nil {
diff --git a/models/file_test.go b/models/file_test.go
index 0f97184..19fdacb 100644
--- a/models/file_test.go
+++ b/models/file_test.go
@@ -339,7 +339,7 @@ func TestDeleteFiles(t *testing.T) {
 	// uid 不一致
 	{
 		err := DeleteFiles([]*File{{}}, 1)
-		a.Contains("User id not consistent", err.Error())
+		a.Contains("user id not consistent", err.Error())
 	}
 
 	// 删除失败
@@ -365,14 +365,26 @@ func TestDeleteFiles(t *testing.T) {
 		a.Error(err)
 	}
 
-	// 成功，其中一个文件已经不存在
+	// 文件脏读
 	{
 		mock.ExpectBegin()
 		mock.ExpectExec("DELETE(.+)").
 			WillReturnResult(sqlmock.NewResult(1, 0))
+		mock.ExpectRollback()
+		err := DeleteFiles([]*File{{Size: 1}, {Size: 2}}, 0)
+		a.NoError(mock.ExpectationsWereMet())
+		a.Error(err)
+		a.Contains("file size is dirty", err.Error())
+	}
+
+	// 成功
+	{
+		mock.ExpectBegin()
+		mock.ExpectExec("DELETE(.+)").
+			WillReturnResult(sqlmock.NewResult(2, 1))
 		mock.ExpectExec("DELETE(.+)").
 			WillReturnResult(sqlmock.NewResult(2, 1))
-		mock.ExpectExec("UPDATE(.+)storage(.+)").WithArgs(uint64(2), sqlmock.AnyArg()).WillReturnResult(sqlmock.NewResult(1, 1))
+		mock.ExpectExec("UPDATE(.+)storage(.+)").WithArgs(uint64(3), sqlmock.AnyArg()).WillReturnResult(sqlmock.NewResult(1, 1))
 		mock.ExpectCommit()
 		err := DeleteFiles([]*File{{Size: 1}, {Size: 2}}, 0)
 		a.NoError(mock.ExpectationsWereMet())