From c5f9eb5022646c7c6b62cf88a6c075162aeb6f77 Mon Sep 17 00:00:00 2001
From: xwxwxw6203 <xwxwxw6203@163.com>
Date: Fri, 15 Aug 2025 23:07:35 +0800
Subject: [PATCH] fix integer overflow in mux of IPC

Signed-off-by: xwxwxw6203 <xwxwxw6203@163.com>
---
 kernel/base/ipc/los_mux.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/kernel/base/ipc/los_mux.c b/kernel/base/ipc/los_mux.c
index fa4a67b8..bd032b14 100644
--- a/kernel/base/ipc/los_mux.c
+++ b/kernel/base/ipc/los_mux.c
@@ -309,7 +309,13 @@ STATIC UINT32 OsMuxPendOp(LosTaskCB *runTask, LosMux *mutex, UINT32 timeout)
     }
 
     if (((LosTaskCB *)mutex->owner == runTask) && (mutex->attr.type == LOS_MUX_RECURSIVE)) {
-        mutex->muxCount++;
+        if(mutex->muxCount!=65535){
+            mutex->muxCount++;
+        } else {
+        return LOS_EINVAL;
+        }
+    }
+        
         return LOS_OK;
     }
 
-- 
Gitee