Fix off-by-one error in bkey send size and clear buffer properly in clear_bufline

src/ckpool.c

@@ -579,6 +579,7 @@ static void clear_bufline(connsock_t *cs)
 	if (unlikely(!cs->buf)) {
 		socklen_t optlen = sizeof(cs->rcvbufsiz);
 
+		cs->bufofs = 0;
 		cs->buf = ckzalloc(PAGESIZE);
 		cs->bufsize = PAGESIZE;
 		getsockopt(cs->fd, SOL_SOCKET, SO_RCVBUF, &cs->rcvbufsiz, &optlen);
@@ -589,8 +590,8 @@ static void clear_bufline(connsock_t *cs)
 		memset(cs->buf + cs->buflen, 0, cs->bufofs);
 		cs->bufofs = cs->buflen;
 		cs->buflen = 0;
-		cs->buf[cs->bufofs] = '\0';
 	}
+	cs->buf[cs->bufofs] = '\0';
 }
 
 static void add_buflen(ckpool_t *ckp, connsock_t *cs, const char *readbuf, const int len)

src/connector.c

@@ -1272,8 +1272,10 @@ static void process_client_msg(cdata_t *cdata, char *buf, uint32_t msglen)
 	msg = json_dumps(json_msg, JSON_EOL | JSON_COMPACT);
 	slen = strlen(msg);
 	if (blen) {
-		msglen = slen + blen;
+		/* We're overwriting the EOL so remove it from msglen */
+		msglen = slen + blen - 1;
 		msg = realloc(msg, msglen);
+		/* Overwrite the EOL here */
 		memcpy(msg + slen - 1, bkey, blen);
 		send_client(cdata, client_id, msg, slen, msglen);
 	} else