From 111d80e5c550b2c505be87e48558b93ac2b42103 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Wed, 5 Dec 2018 17:59:14 +0100
Subject: mg2d: enforce a minimum domain size of 3 points

---
 mg2d.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mg2d.c b/mg2d.c
index c036cf2..eb4efaf 100644
--- a/mg2d.c
+++ b/mg2d.c
@@ -481,7 +481,7 @@ MG2DContext *mg2d_solver_alloc(size_t domain_size)
     MG2DInternal *priv;
     int ret;
 
-    if (SIZE_MAX / domain_size < domain_size)
+    if (domain_size < 3 || SIZE_MAX / domain_size < domain_size)
         return NULL;
 
     ctx = calloc(1, sizeof(*ctx));
-- 
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