From 0522e19fc1f2b399ef52a6a1268ccf4d6e91ef30 Mon Sep 17 00:00:00 2001
From: Guido Vranken <guidovranken@gmail.com>
Date: Sun, 10 Oct 2021 21:02:03 +0200
Subject: [PATCH] Check return value of mp_grow in mp_mod_2d

ZD13048
---
 wolfcrypt/src/integer.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/wolfcrypt/src/integer.c b/wolfcrypt/src/integer.c
index 70a379f0b..a69573af9 100644
--- a/wolfcrypt/src/integer.c
+++ b/wolfcrypt/src/integer.c
@@ -690,7 +690,9 @@ int mp_mod_2d (mp_int * a, int b, mp_int * c)
      mp_digit carry = 0;
 
      /* grow result to size of modulus */
-     mp_grow(c, bmax);
+     if ((res = mp_grow(c, bmax)) != MP_OKAY) {
+         return res;
+     }
      /* negate value */
      for (x = 0; x < c->used; x++) {
          mp_digit next = c->dp[x] > 0;