failed to read PCAP header from "/media/test/Data/EnvFuzz/out/RECORD.pcap.gz": Invalid argument

[hardik05]

Hi,

Thanks for your work, i am trying this tool and getting following error when trying to fuzz:
failed to read PCAP header from "/media/test/Data/EnvFuzz/out/RECORD.pcap.gz": Invalid argument

any idea how to troubleshoot it? it seems that the file size is RECORD.pcap.gz is only 20 bytes and i am guessing its not able to record the state.

[GJDuck]

Yes, it probably means the recording failed for some reason. You can try:

        $ ./env-fuzz record --log=3 -- prog [arg ...]

This should print a log of the all the syscalls executed, and may provide some clue as to the problem.

You can also try running in GDB:

        $ ./env-fuzz record --log=3 -d -- prog [arg ...]

EnvFuzz is a complex tool, so can be hit-and-miss. If you post more details then I may be able to help.