Bug 1863732 - Fix divide by zero error in IPCFuzzController. r=truber

Differential Revision: https://phabricator.services.mozilla.com/D193065
Brli · Nov 13, 2023 · 44d64cc · 44d64cc
1 parent 0cf27dd
commit 44d64cc
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/tools/fuzzing/ipc/IPCFuzzController.cpp b/tools/fuzzing/ipc/IPCFuzzController.cpp
@@ -131,7 +131,10 @@ void IPCFuzzController::InitializeIPCTypes() {
       }
     }
 
-    validMsgTypes[(ProtocolId)start] = i - ((start << 16) + 1);
+    uint32_t msgCount = i - ((start << 16) + 1);
+    if (msgCount) {
+      validMsgTypes[(ProtocolId)start] = msgCount;
+    }
   }
 }