Nautilus not synchronising with AFL

[bendrissou]

Hi,

I have been trying to run Nautilus in combination with AFL, as illustrated in the Readme. However the "S" instance is not aware of the "M" instance, and is not importing its entries.

Terminal 1

cargo run --release -- -o findings -- ./test @@

Terminal 2

afl-fuzz -Safl -i seeds -o findings ./test @@
afl-fuzz++4.10a based on afl by Michal Zalewski and a large online community
[+] AFL++ is maintained by Marc "van Hauser" Heuse, Dominik Maier, Andrea Fioraldi and Heiko "hexcoder" Eißfeldt
[+] AFL++ is open source, get it at https://github.com/AFLplusplus/AFLplusplus
[+] NOTE: AFL++ >= v3 has changed defaults and behaviours - see README.md
[*] Getting to work...
[+] Using exploration-based constant power schedule (EXPLORE)
[+] Enabled testcache with 50 MB
[+] Generating fuzz data with a length of min=1 max=1048576
[*] Checking core_pattern...
[!] WARNING: Could not check CPU scaling governor
[+] You have 4 CPU cores and 5 runnable tasks (utilization: 125%).
[*] Setting up output directories...
[*] Checking CPU core loadout...
[+] Found a free CPU core, try binding to #3.
[!] WARNING: no -M main node found. It is recommended to run exactly one main instance.

The synchronisation works fine when using an AFL M instance.

[bendrissou]

Hi @eqv

Can you confirm this issue please?

Thank you.

[eqv]

I don't know, I'm not even seeing that there's no synchronisation? There's just some warning. AFL++ has changed a lot since nautilus was released. If you want to use this feature with a new AFL++ version (which you probably should), please go find the check that AFL++ does before it prints "no -M main node found. It is recommended to run exactly one main instance.". There's probably some .status or something like that, that AFL++ is missing. Just add that to the folder and you should be good.