commit d2b2bfed9465847baa82a314d4da161b368395bb
author Zachary Turner <zturner@google.com> Wed Jun 08 00:25:08 2016 +0000
committer Zachary Turner <zturner@google.com> Wed Jun 08 00:25:08 2016 +0000
tree a394e7cbf39161112109b311381b2afc0e14de4c
parent a483eae2ff21d238ba3a872ef72ec7943acaefa2

[pdb] Try to fix use after free.

llvm-svn: 272078

llvm/lib/DebugInfo/PDB/Raw/PDBFile.cpp

diff --git a/llvm/lib/DebugInfo/PDB/Raw/PDBFile.cpp b/llvm/lib/DebugInfo/PDB/Raw/PDBFile.cpp
index 2209477..2796abf 100644
--- a/llvm/lib/DebugInfo/PDB/Raw/PDBFile.cpp
+++ b/llvm/lib/DebugInfo/PDB/Raw/PDBFile.cpp
@@ -325,6 +325,9 @@
 
     if (NameStreamIndex == 0)
       return make_error<RawError>(raw_error_code::no_stream);
+    if (NameStreamIndex >= getNumStreams())
+      return make_error<RawError>(raw_error_code::no_stream);
+
     auto SD = llvm::make_unique<IndexedStreamData>(NameStreamIndex, *this);
     auto S = llvm::make_unique<MappedBlockStream>(std::move(SD), *this);
     codeview::StreamReader Reader(*S);