From: Ted Kremenek <kremenek@apple.com>
Date: Mon, 5 Apr 2010 22:39:42 +0000 (+0000)
Subject: Fix possible null dereference by bailing out of CheckObjCPropertyAttributes() early... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=5fcd52a6c94c7f93bd80062248353c45330da23a;p=clang

Fix possible null dereference by bailing out of CheckObjCPropertyAttributes() early if the Decl* is null.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100483 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaObjCProperty.cpp b/lib/Sema/SemaObjCProperty.cpp
index 52b9bcf86c..605750408c 100644
--- a/lib/Sema/SemaObjCProperty.cpp
+++ b/lib/Sema/SemaObjCProperty.cpp
@@ -984,7 +984,10 @@ void Sema::CheckObjCPropertyAttributes(DeclPtrTy PropertyPtrTy,
                                        unsigned &Attributes) {
   // FIXME: Improve the reported location.
   Decl *PDecl = PropertyPtrTy.getAs<Decl>();
-  ObjCPropertyDecl *PropertyDecl = dyn_cast_or_null<ObjCPropertyDecl>(PDecl);
+  if (!PDecl)
+    return;
+
+  ObjCPropertyDecl *PropertyDecl = cast<ObjCPropertyDecl>(PDecl);
   QualType PropertyTy = PropertyDecl->getType(); 
 
   // readonly and readwrite/assign/retain/copy conflict.