fix cmplog

docs/Changelog.md

@@ -28,7 +28,8 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
     - LTO whitelist functionality rewritten, now main, _init etc functions
       need not to be whitelisted anymore
     - fixed crash in compare-transform-pass when strcasemp/strncasecmp was
-      tried to be instrumented
+      tried to be instrumented with LTO
+    - fixed crash in cmplog with LTO
   - fixed afl-gcc/afl-as that could break on fast systems reusing pids in
     the same second
   - added lots of dictionaries from oss-fuzz, go-fuzz and Jakub Wilk

llvm_mode/cmplog-routines-pass.cc

@@ -164,8 +164,10 @@ bool CmpLogRoutines::hookRtns(Module &M) {
     IRB.SetInsertPoint(callInst);
 
     std::vector<Value *> args;
-    args.push_back(v1P);
-    args.push_back(v2P);
+    Value *              v1Pcasted = IRB.CreatePointerCast(v1P, i8PtrTy);
+    Value *              v2Pcasted = IRB.CreatePointerCast(v2P, i8PtrTy);
+    args.push_back(v1Pcasted);
+    args.push_back(v2Pcasted);
 
     IRB.CreateCall(cmplogHookFn, args, "tmp");