Prevent subtract overflow panic when slot < MAX_LOCKOUT_HISTORY (#6135) (#6136)

automerge
2019-09-26 19:08:20 -07:00
parent 61930c0dd3
commit 8b353da83c
1 changed files with 5 additions and 1 deletions
--- a/core/src/rpc.rs
+++ b/core/src/rpc.rs
@@ -159,7 +159,11 @@ impl JsonRpcRequestProcessor {
                }
            })
            .partition(|vote_account_info| {
-                vote_account_info.last_vote >= bank.slot() - MAX_LOCKOUT_HISTORY as u64
+                if bank.slot() >= MAX_LOCKOUT_HISTORY as u64 {
+                    vote_account_info.last_vote > bank.slot() - MAX_LOCKOUT_HISTORY as u64
+                } else {
+                    vote_account_info.last_vote > 0
+                }
            });
        Ok(RpcVoteAccountStatus {
            current: current_vote_accounts,