ShellPkg: assign pointer to NULL after free to prevent double free

Since the API caller may call twice we need to make sure that we set pointer to NULL so we can tell if already free.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Erik Bjorge <erik.c.bjorge@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15107 6f19259b-4bc3-4df7-8a09-765794883524

diff --git a/ShellPkg/Application/Shell/ShellProtocol.c b/ShellPkg/Application/Shell/ShellProtocol.c
index b67aefb71c95486ac7773e4ea04704056ef4c700..c619ba15a1324febcce40c5246760fd6545da771 100644 (file)
--- a/ShellPkg/Application/Shell/ShellProtocol.c
+++ b/ShellPkg/Application/Shell/ShellProtocol.c
@@ -1620,6 +1620,7 @@ EfiShellFreeFileList(
     InternalFreeShellFileInfoNode(ShellFileListItem);\r
   }\r
   InternalFreeShellFileInfoNode(*FileList);\r
+  *FileList = NULL;\r
   return(EFI_SUCCESS);\r
 }\r
 \r