[llvm] r271170 - Don't let the readArray size calculation overflow

[David Majnemer via llvm-commits]

Author: majnemer
Date: Sun May 29 01:18:01 2016
New Revision: 271170

URL: http://llvm.org/viewvc/llvm-project?rev=271170&view=rev
Log:
Don't let the readArray size calculation overflow

Modified:
    llvm/trunk/include/llvm/DebugInfo/CodeView/StreamReader.h

Modified: llvm/trunk/include/llvm/DebugInfo/CodeView/StreamReader.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/DebugInfo/CodeView/StreamReader.h?rev=271170&r1=271169&r2=271170&view=diff
==============================================================================
--- llvm/trunk/include/llvm/DebugInfo/CodeView/StreamReader.h (original)
+++ llvm/trunk/include/llvm/DebugInfo/CodeView/StreamReader.h Sun May 29 01:18:01 2016
@@ -60,6 +60,8 @@ public:
       return Error::success();
     }
     uint32_t Length = NumItems * sizeof(T);
+    if (Length / sizeof(T) != NumItems)
+      return make_error<CodeViewError>(cv_error_code::corrupt_record);
     if (Offset + Length > Stream.getLength())
       return make_error<CodeViewError>(cv_error_code::insufficient_buffer);
     StreamRef View(Stream, Offset, Length);