From 8091b77c7ce363b4116d2e73aa6db15e8aee1b2a Mon Sep 17 00:00:00 2001
From: Con Kolivas <kernel@kolivas.org>
Date: Fri, 13 Mar 2015 22:46:41 +1100
Subject: [PATCH] Allow arbitrary length responses from ckdb in send_recv_auth
 to allow for hundreds of workers

---
 src/stratifier.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/stratifier.c b/src/stratifier.c
index 2f38a53d..33dafa07 100644
--- a/src/stratifier.c
+++ b/src/stratifier.c
@@ -2390,13 +2390,16 @@ static int send_recv_auth(stratum_instance_t *client)
 
 	free(json_msg);
 	if (likely(buf)) {
+		char *cmd = NULL, *secondaryuserid = NULL, *response;
 		worker_instance_t *worker = client->worker_instance;
-		char *cmd = NULL, *secondaryuserid = NULL;
-		char response[PAGESIZE] = {};
 		json_error_t err_val;
+		size_t responselen;
 		json_t *val = NULL;
 
 		LOGINFO("Got ckdb response: %s", buf);
+		responselen = strlen(buf); /* Leave ample room for response based on buf length */
+		response = alloca(responselen);
+		memset(response, 0, responselen);
 		if (unlikely(sscanf(buf, "id.%*d.%s", response) < 1 || strlen(response) < 1 || !strchr(response, '='))) {
 			if (cmdmatch(response, "failed"))
 				goto out;