[PATCH] D130395: [DWP][DWARF] Detect and error on debug info offset overflow
Alexander Yermolovich via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Jul 26 08:20:07 PDT 2022
This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rGf8df8114715b: [DWP][DWARF] Detect and error on debug info offset overflow (authored by ayermolo).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D130395/new/
https://reviews.llvm.org/D130395
Files:
llvm/lib/DWP/DWP.cpp
Index: llvm/lib/DWP/DWP.cpp
===================================================================
--- llvm/lib/DWP/DWP.cpp
+++ llvm/lib/DWP/DWP.cpp
@@ -18,6 +18,7 @@
#include "llvm/Object/Decompressor.h"
#include "llvm/Object/ELFObjectFile.h"
#include "llvm/Support/MemoryBuffer.h"
+#include <limits>
using namespace llvm;
using namespace llvm::object;
@@ -654,6 +655,12 @@
IndexVersion)];
C.Offset = InfoSectionOffset;
C.Length = Header.Length + 4;
+
+ if (std::numeric_limits<uint32_t>::max() - InfoSectionOffset <
+ C.Length)
+ return make_error<DWPError>(
+ "debug information section offset is greater than 4GB");
+
UnitOffset += C.Length;
if (Header.Version < 5 ||
Header.UnitType == dwarf::DW_UT_split_compile) {
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