From e31a621d6fb65719d31a4a8a48ce13b73969bac6 Mon Sep 17 00:00:00 2001
From: tevador <37503146+tevador@users.noreply.github.com>
Date: Fri, 14 Jun 2019 23:16:27 +0200
Subject: [PATCH] Fix possible overflow in static_assert (#67)

---
 src/common.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/common.hpp b/src/common.hpp
index 08fe7f3..e6682ff 100644
--- a/src/common.hpp
+++ b/src/common.hpp
@@ -69,7 +69,7 @@ namespace randomx {
 	static_assert(wtSum == 256,	"Sum of instruction frequencies must be 256.");
 
 
-	constexpr int ArgonBlockSize = 1024;
+	constexpr uint32_t ArgonBlockSize = 1024;
 	constexpr int ArgonSaltSize = sizeof("" RANDOMX_ARGON_SALT) - 1;
 	constexpr int SuperscalarMaxSize = 3 * RANDOMX_SUPERSCALAR_LATENCY + 2;
 	constexpr int CacheLineSize = RANDOMX_DATASET_ITEM_SIZE;
@@ -84,7 +84,7 @@ namespace randomx {
 
 	//Prevent some unsafe configurations.
 #ifndef RANDOMX_UNSAFE
-	static_assert(RANDOMX_CACHE_ACCESSES * RANDOMX_ARGON_MEMORY * ArgonBlockSize + 33554432 >= RANDOMX_DATASET_BASE_SIZE + RANDOMX_DATASET_EXTRA_SIZE, "Unsafe configuration: Memory-time tradeoffs");
+	static_assert((uint64_t)ArgonBlockSize * RANDOMX_CACHE_ACCESSES * RANDOMX_ARGON_MEMORY + 33554432 >= (uint64_t)RANDOMX_DATASET_BASE_SIZE + RANDOMX_DATASET_EXTRA_SIZE, "Unsafe configuration: Memory-time tradeoffs");
 	static_assert((128 + RANDOMX_PROGRAM_SIZE * RANDOMX_FREQ_ISTORE / 256) * (RANDOMX_PROGRAM_COUNT * RANDOMX_PROGRAM_ITERATIONS) >= RANDOMX_SCRATCHPAD_L3, "Unsafe configuration: Insufficient Scratchpad writes");
 	static_assert(RANDOMX_PROGRAM_COUNT > 1, "Unsafe configuration: Program filtering strategies");
 	static_assert(RANDOMX_PROGRAM_SIZE >= 64, "Unsafe configuration: Low program entropy");