From 96815040483351ce80db92b50cd6f5d6a17b76b6 Mon Sep 17 00:00:00 2001
From: pooler <pooler@litecoinpool.org>
Date: Fri, 8 Aug 2014 14:49:07 +0200
Subject: [PATCH] Check for negative extranonce2_size

---
 util.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/util.c b/util.c
index 9be17f6..3bdac5e 100644
--- a/util.c
+++ b/util.c
@@ -1088,6 +1088,10 @@ start:
 		applog(LOG_ERR, "Failed to get extranonce2_size");
 		goto out;
 	}
+	if (xn2_size < 0 || xn2_size > 100) {
+		applog(LOG_ERR, "Invalid value of extranonce2_size");
+		goto out;
+	}
 
 	pthread_mutex_lock(&sctx->work_lock);
 	free(sctx->session_id);