From c9148fbb0a3186e3efc23367cc2b5041f2fddf7f Mon Sep 17 00:00:00 2001
From: chenrun1 <chenrun1@xiaomi.com>
Date: Wed, 19 Jun 2024 18:20:43 +0800
Subject: [PATCH] fs_msync:Fix crash caused under the anonymous mapping

Summary:
 Limitations of using fs putfile

Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
---
 fs/mmap/fs_mmap.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/mmap/fs_mmap.c b/fs/mmap/fs_mmap.c
index 09cf000df8..e1ee0ee89f 100644
--- a/fs/mmap/fs_mmap.c
+++ b/fs/mmap/fs_mmap.c
@@ -286,7 +286,11 @@ FAR void *mmap(FAR void *start, size_t length, int prot, int flags,
 
   ret = file_mmap_(filep, start, length,
                    prot, flags, offset, MAP_USER, &mapped);
-  fs_putfilep(filep);
+  if (filep)
+    {
+      fs_putfilep(filep);
+    }
+
   if (ret < 0)
     {
       goto errout;