From fc2339cd92650040268fa6bee37b10e0009ad9ff Mon Sep 17 00:00:00 2001
From: vicLin8712 <ac01969454@gmail.com>
Date: Sun, 30 Nov 2025 16:09:23 +0800
Subject: [PATCH] Fix double freed in remove_self_from_waiters()

free() is already invoked in list_remove(). Freeing the same pointer twice
can crash the program with an invalid free error or corrupt the heap.

Ensure a single memory-release path by removing the outer free() call.

close #57
---
 kernel/mutex.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/mutex.c b/kernel/mutex.c
index 52a16a72..5ff9c8aa 100644
--- a/kernel/mutex.c
+++ b/kernel/mutex.c
@@ -56,7 +56,6 @@ static bool remove_self_from_waiters(list_t *waiters)
     while (curr && curr != waiters->tail) {
         if (curr->data == self) {
             list_remove(waiters, curr);
-            free(curr);
             return true;
         }
         curr = curr->next;