From ead14b19aa5acbdfb2f1ccc53cc7b8b34517b6e9 Mon Sep 17 00:00:00 2001
From: Samuel Williams <samuel.williams@shopify.com>
Date: Thu, 5 Jun 2025 12:49:02 +0900
Subject: Fix `blocking_operation_wait` use-after-free bug.

---
 thread.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'thread.c')

diff --git a/thread.c b/thread.c
index 019ad2af4e..a637c8ec7c 100644
--- a/thread.c
+++ b/thread.c
@@ -1552,7 +1552,7 @@ rb_nogvl(void *(*func)(void *), void *data1,
     if (flags & RB_NOGVL_OFFLOAD_SAFE) {
         VALUE scheduler = rb_fiber_scheduler_current();
         if (scheduler != Qnil) {
-            struct rb_fiber_scheduler_blocking_operation_state state;
+            struct rb_fiber_scheduler_blocking_operation_state state = {0};
 
             VALUE result = rb_fiber_scheduler_blocking_operation_wait(scheduler, func, data1, ubf, data2, flags, &state);
 
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