diff --git a/routers/api/v1/repo/issue_attachment.go b/routers/api/v1/repo/issue_attachment.go
index 8cbd2e11b6..92e1138688 100644
--- a/routers/api/v1/repo/issue_attachment.go
+++ b/routers/api/v1/repo/issue_attachment.go
@@ -176,7 +176,7 @@ func CreateIssueAttachment(ctx *context.APIContext) {
 		filename = query
 	}
 
-	attachment, err := attachment.UploadAttachment(file, setting.Attachment.AllowedTypes, &repo_model.Attachment{
+	attachment, err := attachment.UploadAttachment(file, setting.Attachment.AllowedTypes, header.Size, &repo_model.Attachment{
 		Name:       filename,
 		UploaderID: ctx.Doer.ID,
 		RepoID:     ctx.Repo.Repository.ID,
diff --git a/routers/api/v1/repo/issue_comment_attachment.go b/routers/api/v1/repo/issue_comment_attachment.go
index 4c8452380f..6fe4dbc977 100644
--- a/routers/api/v1/repo/issue_comment_attachment.go
+++ b/routers/api/v1/repo/issue_comment_attachment.go
@@ -180,7 +180,7 @@ func CreateIssueCommentAttachment(ctx *context.APIContext) {
 		filename = query
 	}
 
-	attachment, err := attachment.UploadAttachment(file, setting.Attachment.AllowedTypes, &repo_model.Attachment{
+	attachment, err := attachment.UploadAttachment(file, setting.Attachment.AllowedTypes, header.Size, &repo_model.Attachment{
 		Name:       filename,
 		UploaderID: ctx.Doer.ID,
 		RepoID:     ctx.Repo.Repository.ID,
diff --git a/routers/api/v1/repo/release_attachment.go b/routers/api/v1/repo/release_attachment.go
index 597578aac5..305b2808df 100644
--- a/routers/api/v1/repo/release_attachment.go
+++ b/routers/api/v1/repo/release_attachment.go
@@ -194,7 +194,7 @@ func CreateReleaseAttachment(ctx *context.APIContext) {
 	}
 
 	// Create a new attachment and save the file
-	attach, err := attachment.UploadAttachment(file, setting.Repository.Release.AllowedTypes, &repo_model.Attachment{
+	attach, err := attachment.UploadAttachment(file, setting.Repository.Release.AllowedTypes, header.Size, &repo_model.Attachment{
 		Name:       filename,
 		UploaderID: ctx.Doer.ID,
 		RepoID:     release.RepoID,
diff --git a/routers/web/repo/attachment.go b/routers/web/repo/attachment.go
index 589632ad6e..c6d8828fac 100644
--- a/routers/web/repo/attachment.go
+++ b/routers/web/repo/attachment.go
@@ -44,7 +44,7 @@ func uploadAttachment(ctx *context.Context, repoID int64, allowedTypes string) {
 	}
 	defer file.Close()
 
-	attach, err := attachment.UploadAttachment(file, allowedTypes, &repo_model.Attachment{
+	attach, err := attachment.UploadAttachment(file, allowedTypes, header.Size, &repo_model.Attachment{
 		Name:       header.Filename,
 		UploaderID: ctx.Doer.ID,
 		RepoID:     repoID,
diff --git a/services/attachment/attachment.go b/services/attachment/attachment.go
index 7fdacc6aae..3e7df0cee0 100644
--- a/services/attachment/attachment.go
+++ b/services/attachment/attachment.go
@@ -19,14 +19,14 @@ import (
 )
 
 // NewAttachment creates a new attachment object, but do not verify.
-func NewAttachment(attach *repo_model.Attachment, file io.Reader) (*repo_model.Attachment, error) {
+func NewAttachment(attach *repo_model.Attachment, file io.Reader, size int64) (*repo_model.Attachment, error) {
 	if attach.RepoID == 0 {
 		return nil, fmt.Errorf("attachment %s should belong to a repository", attach.Name)
 	}
 
 	err := db.WithTx(db.DefaultContext, func(ctx context.Context) error {
 		attach.UUID = uuid.New().String()
-		size, err := storage.Attachments.Save(attach.RelativePath(), file, -1)
+		size, err := storage.Attachments.Save(attach.RelativePath(), file, size)
 		if err != nil {
 			return fmt.Errorf("Create: %w", err)
 		}
@@ -39,7 +39,7 @@ func NewAttachment(attach *repo_model.Attachment, file io.Reader) (*repo_model.A
 }
 
 // UploadAttachment upload new attachment into storage and update database
-func UploadAttachment(file io.Reader, allowedTypes string, opts *repo_model.Attachment) (*repo_model.Attachment, error) {
+func UploadAttachment(file io.Reader, allowedTypes string, fileSize int64, opts *repo_model.Attachment) (*repo_model.Attachment, error) {
 	buf := make([]byte, 1024)
 	n, _ := util.ReadAtMost(file, buf)
 	buf = buf[:n]
@@ -48,5 +48,5 @@ func UploadAttachment(file io.Reader, allowedTypes string, opts *repo_model.Atta
 		return nil, err
 	}
 
-	return NewAttachment(opts, io.MultiReader(bytes.NewReader(buf), file))
+	return NewAttachment(opts, io.MultiReader(bytes.NewReader(buf), file), fileSize)
 }
diff --git a/services/attachment/attachment_test.go b/services/attachment/attachment_test.go
index 72d1b2ab3a..1b9af34427 100644
--- a/services/attachment/attachment_test.go
+++ b/services/attachment/attachment_test.go
@@ -36,7 +36,7 @@ func TestUploadAttachment(t *testing.T) {
 		RepoID:     1,
 		UploaderID: user.ID,
 		Name:       filepath.Base(fPath),
-	}, f)
+	}, f, -1)
 	assert.NoError(t, err)
 
 	attachment, err := repo_model.GetAttachmentByUUID(db.DefaultContext, attach.UUID)
diff --git a/services/mailer/incoming/incoming_handler.go b/services/mailer/incoming/incoming_handler.go
index 454039c60f..b594e35189 100644
--- a/services/mailer/incoming/incoming_handler.go
+++ b/services/mailer/incoming/incoming_handler.go
@@ -87,7 +87,7 @@ func (h *ReplyHandler) Handle(ctx context.Context, content *MailContent, doer *u
 		attachmentIDs := make([]string, 0, len(content.Attachments))
 		if setting.Attachment.Enabled {
 			for _, attachment := range content.Attachments {
-				a, err := attachment_service.UploadAttachment(bytes.NewReader(attachment.Content), setting.Attachment.AllowedTypes, &repo_model.Attachment{
+				a, err := attachment_service.UploadAttachment(bytes.NewReader(attachment.Content), setting.Attachment.AllowedTypes, int64(len(attachment.Content)), &repo_model.Attachment{
 					Name:       attachment.Name,
 					UploaderID: doer.ID,
 					RepoID:     issue.Repo.ID,
diff --git a/services/release/release_test.go b/services/release/release_test.go
index 9b8aaa3649..805269413d 100644
--- a/services/release/release_test.go
+++ b/services/release/release_test.go
@@ -106,11 +106,13 @@ func TestRelease_Create(t *testing.T) {
 		IsTag:        false,
 	}, nil, ""))
 
+	testPlayload := "testtest"
+
 	attach, err := attachment.NewAttachment(&repo_model.Attachment{
 		RepoID:     repo.ID,
 		UploaderID: user.ID,
 		Name:       "test.txt",
-	}, strings.NewReader("testtest"))
+	}, strings.NewReader(testPlayload), int64(len([]byte(testPlayload))))
 	assert.NoError(t, err)
 
 	release := repo_model.Release{
@@ -239,11 +241,12 @@ func TestRelease_Update(t *testing.T) {
 	assert.Equal(t, tagName, release.TagName)
 
 	// Add new attachments
+	samplePayload := "testtest"
 	attach, err := attachment.NewAttachment(&repo_model.Attachment{
 		RepoID:     repo.ID,
 		UploaderID: user.ID,
 		Name:       "test.txt",
-	}, strings.NewReader("testtest"))
+	}, strings.NewReader(samplePayload), int64(len([]byte(samplePayload))))
 	assert.NoError(t, err)
 
 	assert.NoError(t, UpdateRelease(user, gitRepo, release, []string{attach.UUID}, nil, nil))