From 0571d97969186fa49782c2f2249e56737bfbf5d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fredrik=20Adel=C3=B6w?= <freben@gmail.com>
Date: Wed, 6 Aug 2025 14:13:22 +0200
Subject: [PATCH] add guard against overlapping write misuse
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Fredrik Adelöw <freben@gmail.com>
---
 plugins/catalog-backend/src/service/response/write.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/plugins/catalog-backend/src/service/response/write.ts b/plugins/catalog-backend/src/service/response/write.ts
index 8fbd54d01c..628a1cb27c 100644
--- a/plugins/catalog-backend/src/service/response/write.ts
+++ b/plugins/catalog-backend/src/service/response/write.ts
@@ -129,6 +129,12 @@ export function createResponseDataWriter(
   });
 
   return async data => {
+    if (drainPromise) {
+      throw new Error(
+        'Attempted overlapping write while waiting for previous write to drain',
+      );
+    }
+
     if (res.write(data, 'utf8')) {
       return 'ok';
     }