[COFFDumper] Validate that the next offset is not too large

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271147 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/tools/llvm-readobj/COFFDumper.cpp b/tools/llvm-readobj/COFFDumper.cpp
index a216a05..029674b 100644 (file)
--- a/tools/llvm-readobj/COFFDumper.cpp
+++ b/tools/llvm-readobj/COFFDumper.cpp
@@ -736,6 +736,8 @@ void COFFDumper::printCodeViewSymbolSection(StringRef SectionName,
     size_t SectionOffset = Data.data() - SectionContents.data();
     size_t NextOffset = SectionOffset + SubSectionSize;
     NextOffset = alignTo(NextOffset, 4);
+    if (NextOffset > SectionContents.size())
+      return error(object_error::parse_failed);
     Data = SectionContents.drop_front(NextOffset);
 
     // Optionally print the subsection bytes in case our parsing gets confused