From ec7bfcbfd6f1c499de1c6aa0fb1c2e2fc00c2460 Mon Sep 17 00:00:00 2001
From: yi chen <94xhn1@gmail.com>
Date: Thu, 9 Jul 2026 11:48:03 +0800
Subject: [PATCH] mem: guard rt_smem_setname() against a NULL name

rt_smem_setname() dereferenced name[index] without checking for
NULL first. Some callers legitimately pass an unnamed allocation
through with a NULL name, which crashed instead of just leaving
the trace field blank.

Treat a NULL name the same as an empty string, so the existing
fill-with-spaces loop below handles it without duplicating that
logic.

Fixes #9793

Signed-off-by: yi chen <94xhn1@gmail.com>
---
 src/mem.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/mem.c b/src/mem.c
index ce5a87b5fde..1d8c9990408 100644
--- a/src/mem.c
+++ b/src/mem.c
@@ -103,6 +103,11 @@ struct rt_small_mem
 rt_inline void rt_smem_setname(struct rt_small_mem_item *mem, const char *name)
 {
     int index;
+    if (name == RT_NULL)
+    {
+        name = "";
+    }
+
     for (index = 0; index < sizeof(mem->thread); index ++)
     {
         if (name[index] == '\0') break;