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Add a Message fuzzing target

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Ben Kimock 2021-12-15 21:14:59 -05:00 committed by Dirkjan Ochtman
parent 22ffc3fd2a
commit 4a728dffcf
3 changed files with 577 additions and 0 deletions
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504
crates/proto/fuzz/Cargo.lock generated Normal file
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37
crates/proto/fuzz/Cargo.toml Normal file
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[package]
name = "trust-dns-proto-fuzz"
version = "0.0.0"
authors = ["Automatically generated"]
publish = false
edition = "2018"
[package.metadata]
cargo-fuzz = true
[dependencies]
libfuzzer-sys = "0.4"
[dependencies.trust-dns-proto]
path = ".."
# Prevent this from interfering with workspaces
[workspace]
members = ["."]
[[bin]]
name = "message"
path = "fuzz_targets/message.rs"
test = false
doc = false
[[bin]]
name = "name"
path = "fuzz_targets/name.rs"
test = false
doc = false
[[bin]]
name = "rdata"
path = "fuzz_targets/rdata.rs"
test = false
doc = false

36
crates/proto/fuzz/fuzz_targets/message.rs Normal file
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#![no_main]
use libfuzzer_sys::fuzz_target;
use trust_dns_proto::op::Message;
use trust_dns_proto::serialize::binary::{BinDecodable, BinEncodable};
fuzz_target!(|data: &[u8]| {
if let Ok(msg) = Message::from_bytes(data) {
// Temporary hack to pass over messages with CAA records, because there's an empty string
// -> None round-trip failure inside CAA that we're not looking for right now.
if let Some(add) = msg.additionals().get(0) {
if add.rr_type() == trust_dns_proto::rr::record_type::RecordType::CAA {
return;
}
}
let new_data = msg.to_bytes().unwrap();
match Message::from_bytes(&new_data) {
Ok(reparsed) => {
if msg != reparsed {
for (m, r) in format!("{:#?}", msg)
.lines()
.zip(format!("{:#?}", reparsed).lines())
{
if m != r {
println!("{} -> {}", m, r);
}
}
assert_eq!(msg, reparsed);
}
}
Err(e) => {
eprintln!("{:?}", msg);
panic!("Message failed to deserialize: {:?}", e);
}
}
}
});