From ea066859032643480c680907616e4fe6e413ad86 Mon Sep 17 00:00:00 2001
From: Jeremy Soller <jackpot51@gmail.com>
Date: Fri, 9 Jan 2026 12:08:16 -0700
Subject: [PATCH] Do not allow recursively registering the same event queue

---
 src/event.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/event.rs b/src/event.rs
index 4cf0887882..0baed63fc2 100644
--- a/src/event.rs
+++ b/src/event.rs
@@ -59,6 +59,12 @@ impl EventQueue {
                 (description.scheme, description.number)
             };
 
+            if scheme == GlobalSchemes::Event.scheme_id() && number == self.id.into() {
+                // Do not allow recursively registering the same event queue
+                //TODO: should we also disallow event queues that contain this event queue?
+                return Err(Error::new(EBADF));
+            }
+
             register(
                 RegKey { scheme, number },
                 QueueKey {