From a129bbd944f717d00cff6ee099c47ecede4dbc3c Mon Sep 17 00:00:00 2001
From: moneromooo-monero <moneromooo-monero@users.noreply.github.com>
Date: Wed, 25 Jul 2018 21:56:39 +0100
Subject: [PATCH] multiexp: fix maxscalar off by one

Reported by QuarksLab.
---
 src/ringct/multiexp.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ringct/multiexp.cc b/src/ringct/multiexp.cc
index b05840322..901b00edd 100644
--- a/src/ringct/multiexp.cc
+++ b/src/ringct/multiexp.cc
@@ -605,7 +605,7 @@ rct::key pippenger(const std::vector<MultiexpData> &data, const std::shared_ptr<
       maxscalar = data[i].scalar;
   }
   size_t groups = 0;
-  while (groups < 256 && pow2(groups) < maxscalar)
+  while (groups < 256 && !(maxscalar < pow2(groups)))
     ++groups;
   groups = (groups + c - 1) / c;