if found the next FFS size equal 0xFFFFFF, return NOT_FOUND

Cc: Bob Feng <bob.c.f...@intel.com>
Cc: Liming Gao <liming....@intel.com>

Signed-off-by: Yunhua Feng <yunhuax.f...@intel.com>
---
 BaseTools/Source/C/FMMT/FmmtLib.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/BaseTools/Source/C/FMMT/FmmtLib.c 
b/BaseTools/Source/C/FMMT/FmmtLib.c
index cdbee3d629..4fb10ecfe6 100644
--- a/BaseTools/Source/C/FMMT/FmmtLib.c
+++ b/BaseTools/Source/C/FMMT/FmmtLib.c
@@ -1769,10 +1769,13 @@ FvBufFindNextFile (
       (*Key + sizeof (*fhdr)) < fvSize;
       *Key = (UINTN)ALIGN_POINTER (*Key, 8)
     ) {
     fhdr = (EFI_FFS_FILE_HEADER*) ((UINT8*)hdr + *Key);
     fsize = GetFfsFileLength (fhdr);
+    if (fsize == 0xffffff) {
+      break;
+    }
     if (!EFI_TEST_FFS_ATTRIBUTES_BIT(
           FvbAttributes,
           fhdr->State,
           EFI_FILE_HEADER_VALID
         ) ||
--
2.12.2.windows.2


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