static analyzer: Fix use-after-free bug in RegionStore involving LazyCompoundValueData not reference counting Store objects.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127288 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 8 insertions, 6 deletions

diff --git a/lib/StaticAnalyzer/Core/BasicValueFactory.cpp b/lib/StaticAnalyzer/Core/BasicValueFactory.cpp
index 6315d83d89..d29c86adcf 100644
--- a/lib/StaticAnalyzer/Core/BasicValueFactory.cpp
+++ b/lib/StaticAnalyzer/Core/BasicValueFactory.cpp
@@ -25,8 +25,9 @@ void CompoundValData::Profile(llvm::FoldingSetNodeID& ID, QualType T,
 }
 
 void LazyCompoundValData::Profile(llvm::FoldingSetNodeID& ID,
-                                  const void *store,const TypedRegion *region) {
-  ID.AddPointer(store);
+                                  const StoreRef &store,
+                                  const TypedRegion *region) {
+  ID.AddPointer(store.getStore());
   ID.AddPointer(region);
 }
 
@@ -124,7 +125,7 @@ BasicValueFactory::getCompoundValData(QualType T,
 }
 
 const LazyCompoundValData*
-BasicValueFactory::getLazyCompoundValData(const void *store,
+BasicValueFactory::getLazyCompoundValData(const StoreRef &store,
                                           const TypedRegion *region) {
   llvm::FoldingSetNodeID ID;
   LazyCompoundValData::Profile(ID, store, region);
diff --git a/lib/StaticAnalyzer/Core/RegionStore.cpp b/lib/StaticAnalyzer/Core/RegionStore.cpp
index 19e0e12572..96a9d4f5d3 100644
--- a/lib/StaticAnalyzer/Core/RegionStore.cpp
+++ b/lib/StaticAnalyzer/Core/RegionStore.cpp
@@ -1250,12 +1250,12 @@ SVal RegionStoreManager::RetrieveLazySymbol(const TypedRegion *R) {
 SVal RegionStoreManager::RetrieveStruct(Store store, const TypedRegion* R) {
   QualType T = R->getValueType();
   assert(T->isStructureOrClassType());
-  return svalBuilder.makeLazyCompoundVal(store, R);
+  return svalBuilder.makeLazyCompoundVal(StoreRef(store, *this), R);
 }
 
 SVal RegionStoreManager::RetrieveArray(Store store, const TypedRegion * R) {
   assert(Ctx.getAsConstantArrayType(R->getValueType()));
-  return svalBuilder.makeLazyCompoundVal(store, R);
+  return svalBuilder.makeLazyCompoundVal(StoreRef(store, *this), R);
 }
 
 //===----------------------------------------------------------------------===//
@@ -1378,7 +1378,8 @@ StoreRef RegionStoreManager::BindArray(Store store, const TypedRegion* R,
 
     // Treat the string as a lazy compound value.
     nonloc::LazyCompoundVal LCV =
-      cast<nonloc::LazyCompoundVal>(svalBuilder.makeLazyCompoundVal(store, S));
+      cast<nonloc::LazyCompoundVal>(svalBuilder.
+                                makeLazyCompoundVal(StoreRef(store, *this), S));
     return CopyLazyBindings(LCV, store, R);
   }