Every callback has an associated counter value that is decremented upon invocation of the callback until it reaches the value zero, indicating that the callback should not be executed anymore Line 16 denotes that the tainted data that is written is actually bad tainted and line 14 lists the tainted contents of the buffer that is written - which as expected matches the entered URL Or in short anything that changes the existing interface in a way that any existing client might cease to work correctly with the new interface bug member of the PEB in each process gerridaeTo this end we also implemented the possibility to call a trap function whenever a read or write operation on memory occurs In the above section we described how data gets tainted the first time in our system by the taint sources As we have seen in the previous section for a component model to work correctly the components have to adhere to reliable and stable interfaces As one can see from the structure the first member of an ETHREAD is a KTHREAD This is what Microsoft had in mind when they designed the Component Object Model plasmatronA more sophisticated algorithm is needed to detect whenever data is written to shared memory regions