fuzz: add fuzzing target for parsing transport parameters

fuzz/Cargo.toml

@@ -34,3 +34,9 @@ name = "packet"
 path = "fuzz_targets/packet.rs"
 test = false
 doc = false
+
+[[bin]]
+name = "params"
+path = "fuzz_targets/params.rs"
+test = false
+doc = false

fuzz/fuzz_targets/params.rs

@@ -0,0 +1,9 @@
+#![no_main]
+
+use libfuzzer_sys::fuzz_target;
+use proto::{Side, transport_parameters::TransportParameters};
+
+fuzz_target!(|data: &[u8]| {
+    let mut data = data;
+    let _ = TransportParameters::read(Side::Client, &mut data);
+});