Fix another possible crash in rsa_ossl_mod_exp.
@@ -608,6 +608,8 @@ static int rsa_ossl_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
r1 = BN_CTX_get(ctx);
m1 = BN_CTX_get(ctx);
vrfy = BN_CTX_get(ctx);
+ if (vrfy == NULL)
+ goto err;
{
BIGNUM *p = BN_new(), *q = BN_new();
