From f7e21d9d9b099458faad616b097216316de2ce19 Mon Sep 17 00:00:00 2001
From: Abhijeet Prasad <aprasad@sentry.io>
Date: Thu, 19 Oct 2023 11:09:30 -0400
Subject: [PATCH] fix(node): Check buffer length when attempting to parse ANR
 frame

---
 packages/node/src/anr/websocket.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/packages/node/src/anr/websocket.ts b/packages/node/src/anr/websocket.ts
index 9faa90bcfd1c..7229f0fc07e7 100644
--- a/packages/node/src/anr/websocket.ts
+++ b/packages/node/src/anr/websocket.ts
@@ -296,6 +296,13 @@ class WebSocketInterface extends EventEmitter {
       return;
     }
 
+    // There needs to be atleast two values in the buffer for us to parse
+    // a frame from it.
+    // See: https://github.com/getsentry/sentry-javascript/issues/9307
+    if (buff.length <= 1) {
+      return;
+    }
+
     const frame = parseFrame(buff);
 
     if (isCompleteFrame(frame)) {