Simics Process being Killed

[cglosner]

I am running the fuzzer inside a docker container, but for some reason when hit CTRL-C to kill tsffs to reproduce a crash from the simics terminal after about 30secs the simics process gets killed. I can usually reproduce one solution before it kills the program. This only happens when running with a custom bios image, but when I use the default one I don't have the problem and am able to reproduce the results just fine.

This wasn't a problem with the older version of tsffs I was testing on. The problem is most likely on my end, but I wasn't sure if this has been seen by anyone else or if there are any ideas on what I might be doing wrong?

[novafacing]

Check if it is exiting with code 55 -- if so, this is due to the executor timeout from LibAFL. A PR will be in soon to fix this. If not, we can figure out what's going on.

In the meantime as a workaround, you can set @tsffs.executor_timeout = 600 or some other large value to give yourself time to repro.

[cglosner]

Yes, that seemed to be the problem, I'll use that workaround until the PR comes out. Thank you.

[novafacing]

A note for in the meantime if anyone thinks they are having this issue: you can set @tsffs.debug_log_libafl = True to enable a logging consumer which will print LibAFL error messages including the one indicating this type of exit.