Crash is triggered while fuzzing network application with UI

[jameshanon89]

Hello, WinAfl team, I am fuzz-testing my messenger application with UI. I had tested with drrun.exe that my target offset is covered correctly with one packet. But i had met crash during fuzzing with afl-fuzz.exe with that packet. And the I have set "AFL_SKIP_CRASHES" as 1. If I had done, then I met time out crash. Please help me.

[ifratric]

Which Windows version and which DynamoRIO version?

[jameshanon89]

Thank you for your answering.
My OS version is windows 11 26200.8457 and DynamoRIO is windows-11.91.20587.

[ifratric]

There is an issue with DynamoRIO on Windows 11 after 24H2 which you might be encountering. See this thread for more info #479. There is a DynamoRIO patch linked from that thread that you can try applying. Or alternately, you can try switching from DynamoRIO to TinyInst backend.

[jameshanon89]

Thank you. I will try.