[PATCH] MdePkg/BasePeCoffLib: skip runtime relocation if relocation info is invalid.

[Neo Hsueh <hong-chihx.hsueh@intel.com>]

Skip runtime relocation for PE images that provide invalid relocation infomation
(ex: RelocDir->Size = 0) to fix a hang observed while booting
Windows.

Contributed-under: TianoCore Contribution Agreement 1.1

Signed-off-by: Neo Hsueh <hong-chihx.hsueh@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Dandan Bi <dandan.bi@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
---
 MdePkg/Library/BasePeCoffLib/BasePeCoff.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoff.c b/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
index 1bd079ad6a..f01c691dea 100644
--- a/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
+++ b/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
@@ -1746,6 +1746,12 @@ PeCoffLoaderRelocateImageForRuntime (
                                                                             RelocDir->VirtualAddress + RelocDir->Size - 1,
                                                                             0
                                                                             );
+    if (RelocBase == NULL || RelocBaseEnd == NULL || RelocBaseEnd < RelocBase) {
+      //
+      // relocation block is not valid, just return
+      //
+      return;
+    }
   } else {
     //
     // Cannot find relocations, cannot continue to relocate the image, ASSERT for this invalid image.
-- 
2.16.2.windows.1