From 4cd4303c321e20153b3b63d2c55d0c7e25e9dc22 Mon Sep 17 00:00:00 2001
From: xiangdong6 <xiangdong6@xiaomi.com>
Date: Sat, 3 Sep 2022 13:10:23 +0800
Subject: [PATCH] binfmt: Check return pointer.

Function builtin_for_index may return NULL.
We must check this to prevent visit invalid address.

Signed-off-by: xiangdong6 <xiangdong6@xiaomi.com>
---
 binfmt/builtin.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/binfmt/builtin.c b/binfmt/builtin.c
index a7a85d9a53..9ba1b59d8a 100644
--- a/binfmt/builtin.c
+++ b/binfmt/builtin.c
@@ -97,6 +97,12 @@ static int builtin_loadbinary(FAR struct binary_s *binp,
    */
 
   builtin         = builtin_for_index(index);
+  if (builtin == NULL)
+    {
+      berr("ERROR: %s is not a builtin application\n", filename);
+      return -ENOENT;
+    }
+
   binp->entrypt   = builtin->main;
   binp->stacksize = builtin->stacksize;
   binp->priority  = builtin->priority;