From d29916b4c598c3561ac77c3aff9a27381b807967 Mon Sep 17 00:00:00 2001 From: Steffen Jaeckel 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. */