From b53bbb15c5b7ec5599082c4c96db6f894b7c65d6 Mon Sep 17 00:00:00 2001
From: tianxin7 <tianxin7@xiaomi.com>
Date: Thu, 2 Sep 2021 14:46:31 +0800
Subject: [PATCH] fs:add _POSIX_OPEN_MAX limit to files_extend
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Signed-off-by: 田昕 <tianxin7@xiaomi.com>
---
 fs/inode/fs_files.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/inode/fs_files.c b/fs/inode/fs_files.c
index ba310176f42..7d4eaf77d55 100644
--- a/fs/inode/fs_files.c
+++ b/fs/inode/fs_files.c
@@ -71,6 +71,11 @@ static int files_extend(FAR struct filelist *list, size_t row)
       return 0;
     }
 
+  if (row * CONFIG_NFILE_DESCRIPTORS_PER_BLOCK > _POSIX_OPEN_MAX)
+    {
+      return -EMFILE;
+    }
+
   tmp = kmm_realloc(list->fl_files, sizeof(FAR struct file *) * row);
   DEBUGASSERT(tmp);
   if (tmp == NULL)