Input values are not sanitized after they are deserialized, making it far too easy for Leo to earn SOL (#9706)

* sanitize gossip protocol messages
* sanitize transactions
* crds protocol sanitize

sdk/src/signature.rs

@@ -49,6 +49,8 @@ impl Keypair {
 #[derive(Serialize, Deserialize, Clone, Copy, Default, Eq, PartialEq, Ord, PartialOrd, Hash)]
 pub struct Signature(GenericArray<u8, U64>);
 
+impl crate::sanitize::Sanitize for Signature {}
+
 impl Signature {
     pub fn new(signature_slice: &[u8]) -> Self {
         Self(GenericArray::clone_from_slice(&signature_slice))