From d29916b4c598c3561ac77c3aff9a27381b807967 Mon Sep 17 00:00:00 2001
From: Steffen Jaeckel <s@jaeckel.eu>
Date: Wed, 26 Dec 2018 13:16:15 +0100
Subject: [PATCH] fix missing check of return value
---
bn_mp_prime_is_prime.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/bn_mp_prime_is_prime.c b/bn_mp_prime_is_prime.c
index 4915ab8..ce6958a 100644
--- a/bn_mp_prime_is_prime.c
+++ b/bn_mp_prime_is_prime.c
@@ -335,7 +335,9 @@ int mp_prime_is_prime(const mp_int *a, int t, int *result)
len = mp_count_bits(&b);
if (len > size_a) {
len = len - size_a;
- mp_div_2d(&b, len, &b, NULL);
+ if ((err = mp_div_2d(&b, len, &b, NULL)) != MP_OKAY) {
+ goto LBL_B;
+ }
}
/* Although the chance for b <= 3 is miniscule, try again. */