MdeModulePkg/FvSimpleFileSystem:Fix a potential NULL dereference issue.

Contributed-under: TianoCore Contribution Agreement 1.0

Signed-off-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Shumin Qiu <shumin.qiu@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16562 6f19259b-4bc3-4df7-8a09-765794883524

diff --git a/MdeModulePkg/Universal/FvSimpleFileSystemDxe/FvSimpleFileSystem.c b/MdeModulePkg/Universal/FvSimpleFileSystemDxe/FvSimpleFileSystem.c
index d3f447a3211e7a2ee7fb52821947f760abb464a8..019be267578a506c30b85360ef5acff8b7e52fcb 100644 (file)
--- a/MdeModulePkg/Universal/FvSimpleFileSystemDxe/FvSimpleFileSystem.c
+++ b/MdeModulePkg/Universal/FvSimpleFileSystemDxe/FvSimpleFileSystem.c
@@ -499,6 +499,9 @@ FvSimpleFileSystemOpen (
   Instance = File->Instance;\r
 \r
   FileName = TrimFilePathToAbsolutePath (FileName);\r
+  if (FileName == NULL) {\r
+    return EFI_INVALID_PARAMETER;\r
+  }\r
 \r
   if (FileName[0] == L'\\') {\r
     FileName++;\r