From: Duncan Dean <git@dunxen.dev>
Date: Tue, 9 May 2023 06:37:58 +0000 (+0200)
Subject: Enforce that no bytes remain for TransactionU16LenLimited read
X-Git-Tag: v0.0.116-alpha1~43^2
X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=commitdiff_plain;h=33e901a88f43fd6426b14b934fcdd15d5f6bc04e;p=rust-lightning

Enforce that no bytes remain for TransactionU16LenLimited read
---

diff --git a/lightning/src/util/ser.rs b/lightning/src/util/ser.rs
index 1570e5aee..cbdb5485e 100644
--- a/lightning/src/util/ser.rs
+++ b/lightning/src/util/ser.rs
@@ -1384,7 +1384,12 @@ impl Readable for TransactionU16LenLimited {
 	fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
 		let len = <u16 as Readable>::read(r)?;
 		let mut tx_reader = FixedLengthReader::new(r, len as u64);
-		Ok(Self(Readable::read(&mut tx_reader)?))
+		let tx: Transaction = Readable::read(&mut tx_reader)?;
+		if tx_reader.bytes_remain() {
+			Err(DecodeError::BadLengthDescriptor)
+		} else {
+			Ok(Self(tx))
+		}
 	}
 }