From 33e901a88f43fd6426b14b934fcdd15d5f6bc04e Mon Sep 17 00:00:00 2001
From: Duncan Dean <git@dunxen.dev>
Date: Tue, 9 May 2023 08:37:58 +0200
Subject: [PATCH] Enforce that no bytes remain for TransactionU16LenLimited
 read

---
 lightning/src/util/ser.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

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))
+		}
 	}
 }
 
-- 
2.39.5