From dcbe723bc5847d598ae5c06a89807cd8e813c605 Mon Sep 17 00:00:00 2001 From: "Dr. Stephen Henson" Date: Wed, 22 Jun 2011 15:23:40 +0000 Subject: [PATCH] PR: 2540 Submitted by: emmanuel.azencot@bull.net Reviewed by: steve Prevent infinite loop in BN_GF2m_mod_inv(). --- crypto/bn/bn_gf2m.c | 1 + 1 file changed, 1 insertion(+) diff --git a/crypto/bn/bn_gf2m.c b/crypto/bn/bn_gf2m.c index 3bf017feda..573156accb 100644 --- a/crypto/bn/bn_gf2m.c +++ b/crypto/bn/bn_gf2m.c @@ -547,6 +547,7 @@ int BN_GF2m_mod_inv(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx) { while (!BN_is_odd(u)) { + if (BN_is_zero(u)) goto err; if (!BN_rshift1(u, u)) goto err; if (BN_is_odd(b)) { -- 2.25.1