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LND Fuzz

Fuzzing seeds for the Lightning Network Daemon.

Contributing

If you find coverage-increasing inputs while fuzzing LND, please create a pull request adding them to this repository. Use the corpus_merge.sh script to only add inputs that increase coverage.

Example

Here's an example workflow to contribute new inputs for the lnwire FuzzAcceptChannel target. We'll assume the lnd and lnd-fuzz repositories are checked out in the current directory.

First create a directory for corpus inputs to be saved in. Use the lnd-fuzz corpus to seed the new corpus, and begin fuzzing:

export ROOT=$(pwd)
mkdir lnwire_corpus
cp -r lnd-fuzz/lnwire/testdata/fuzz/FuzzAcceptChannel lnwire_corpus/
cd lnd/lnwire
go test -fuzz=FuzzAcceptChannel -parallel=4 -test.fuzzcachedir="$ROOT/lnwire_corpus"

After some time, the fuzzer may find some potential coverage-increasing inputs and save them to lnwire_corpus/FuzzAcceptChannel/. We can then merge them into the lnd-fuzz corpus:

cd $ROOT
lnd-fuzz/corpus_merge.sh lnd-fuzz/lnwire/testdata/fuzz/FuzzAcceptChannel \
    lnwire_corpus/FuzzAcceptChannel lnd/lnwire FuzzAcceptChannel

Any inputs in lnwire_corpus/FuzzAcceptChannel that increase coverage over the existing lnd-fuzz corpus will be copied over. If new inputs were added, create a pull request to improve the upstream seed corpus:

cd lnd-fuzz
git add lnwire/testdata/fuzz/FuzzAcceptChannel/*
git commit