Under windows, you can issue asynchronous IO operations to the kernel. sometimes, you are impatient to wait for the completion of the operation. Then you need to use CancelIoEx() to cancel this operation.
My recent code does not cancel the operation and I simply free the hEvent associated with the asynchronous IO operation. The consequence is extremely severe. The stack of my program has been tampered. I experienced STATUS_STACK_BUFFER_OVERRUN error.
It was a futile effort and I spent lots of time understand the STATUS_STACK_BUFFER_OVERRUN error and lots of time examine the assembly code. Then I found out the code stack has been modified by someone else. Then I began to re-check the entire code logic and finally caught the culprit.
No comments:
Post a Comment