!VRULIdgoKmKPzJZzjj:nixos.org

Nix Hackers

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For people hacking on the Nix package manager itself209 Servers

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7 Oct 2025
@fzakaria:one.ems.hostfzakariaI saw you could; the bash.dict in AFL++ is a good example. That PR is pretty slick; I don't understand yet the N fuzzers but must be a feature with harness i'm not familiar with19:56:27
@lovesegfault:matrix.orglovesegfaulti took it from this: https://aflplus.plus/docs/fuzzing_in_depth/#c-using-multiple-cores19:58:01
@fzakaria:one.ems.hostfzakariaafl-tmin is pretty cool too.19:58:09
@lovesegfault:matrix.orglovesegfaulti'm trying out a dictionary, let's see19:58:19
@fzakaria:one.ems.hostfzakaria(even minimizes without a crash to give you same coverage)19:58:25
@fzakaria:one.ems.hostfzakariathe sweet of tools is insane19:58:57
@fzakaria:one.ems.hostfzakarialike https://aflplus.plus/docs/technical_details/#13-the-afl-analyze-tool19:59:24
@lovesegfault:matrix.orglovesegfault i wonder if i need each secondary fuzzer to get passed -x as well 20:00:15
@fzakaria:one.ems.hostfzakariahere is my dumb (I wanted to learn it) post https://fzakaria.com/2025/10/07/fuzzing-for-fun-and-profit20:00:16
@fzakaria:one.ems.hostfzakaria might be cool to look at queue and have AFL try to do nix build; see what interesting derivations it comes up with :P 20:01:44
@fzakaria:one.ems.hostfzakaria since at some point it needs to do derivation function or use nixpkgs... it cant just evaluate simple Nix expressions 20:02:23
@fzakaria:one.ems.hostfzakariasimilar to https://lcamtuf.blogspot.com/2014/11/pulling-jpegs-out-of-thin-air.html20:04:06
@lovesegfault:matrix.orglovesegfaultoh, the dictionary made it better i think20:04:25
@lovesegfault:matrix.orglovesegfaultit's getting more coverage now20:04:29
@fzakaria:one.ems.hostfzakarialet's see what AFL cooks up as a derivation20:13:49

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