From 08a0d7f53abe254b1fc9579de8e3a67d1c5f8a89 Mon Sep 17 00:00:00 2001
From: Oleksandr Babak <alexanderbabak@proton.me>
Date: Wed, 2 Apr 2025 17:57:48 +0200
Subject: feat: do not cause memory corruption if `remove_from_list` (safe
 function) is called multiple times

---
 rtic-common/src/wait_queue.rs | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'rtic-common/src')

diff --git a/rtic-common/src/wait_queue.rs b/rtic-common/src/wait_queue.rs
index a3f5cab..4debcb9 100644
--- a/rtic-common/src/wait_queue.rs
+++ b/rtic-common/src/wait_queue.rs
@@ -140,6 +140,10 @@ impl<T: Clone> Link<T> {
 
     /// Remove this link from a linked list.
     pub fn remove_from_list(&self, list: &DoublyLinkedList<T>) {
+        if self.is_popped() {
+            return;
+        }
+
         cs::with(|_| {
             // Make sure all previous writes are visible
             core::sync::atomic::fence(Ordering::SeqCst);
-- 
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