Add length check for read ChannelMonitor keys

diff --git a/lightning/src/util/persist.rs b/lightning/src/util/persist.rs
index ca0605c95983afd3b370cafddaf82de2868dadfb..372a094a931bed6dcca159e4bab310cdd7863a4b 100644 (file)
--- a/lightning/src/util/persist.rs
+++ b/lightning/src/util/persist.rs
@@ -216,6 +216,12 @@ where
        for stored_key in kv_store.list(
                CHANNEL_MONITOR_PERSISTENCE_NAMESPACE, CHANNEL_MONITOR_PERSISTENCE_SUB_NAMESPACE)?
        {
+               if stored_key.len() < 66 {
+                       return Err(io::Error::new(
+                               io::ErrorKind::InvalidData,
+                               "Stored key has invalid length"));
+               }
+
                let txid = Txid::from_hex(stored_key.split_at(64).0).map_err(|_| {
                        io::Error::new(io::ErrorKind::InvalidData, "Invalid tx ID in stored key")
                })?;