test/bntest.c:993: error: BUFFER_OVERRUN_L3
  Offset: [1, +oo] Size: [0, 8388607] by call to `BN_mod_exp`.
Showing all 20 steps of the trace


test/bntest.c:990:5: Call
988.       e = BN_new();
989.   
990.       BN_one(a);
           ^
991.       BN_one(b);
992.       BN_zero(c);

crypto/bn/bn_lib.c:530:1: Parameter `a->top`
  528.   }
  529.   
  530. > int BN_set_word(BIGNUM *a, BN_ULONG w)
  531.   {
  532.       bn_check_top(a);

test/bntest.c:993:9: Call
991.       BN_one(b);
992.       BN_zero(c);
993.       if (BN_mod_exp(d, a, b, c, ctx)) {
               ^
994.           fprintf(stderr, "BN_mod_exp with zero modulus succeeded!\n");
995.           return 0;

crypto/bn/bn_exp.c:191:1: Parameter `a->top`
  189.   }
  190.   
  191. > int BN_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, const BIGNUM *m,
  192.                  BN_CTX *ctx)
  193.   {

crypto/bn/bn_exp.c:251:19: Call
  249.           } else
  250.   # endif
  251.               ret = BN_mod_exp_mont(r, a, p, m, ctx, NULL);
                           ^
  252.       } else
  253.   #endif

crypto/bn/bn_exp.c:401:1: Parameter `a->top`
    399.   }
    400.   
    401. > int BN_mod_exp_mont(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p,
    402.                       const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
    403.   {

crypto/bn/bn_exp.c:413:16: Call
    411.   
    412.       if (BN_get_flags(p, BN_FLG_CONSTTIME) != 0) {
    413.           return BN_mod_exp_mont_consttime(rr, a, p, m, ctx, in_mont);
                          ^
    414.       }
    415.   

crypto/bn/bn_exp.c:655:1: Parameter `a->top`
      653.    * http://www.daemonology.net/hyperthreading-considered-harmful/)
      654.    */
      655. > int BN_mod_exp_mont_consttime(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p,
      656.                                 const BIGNUM *m, BN_CTX *ctx,
      657.                                 BN_MONT_CTX *in_mont)

crypto/bn/bn_exp.c:808:14: Call
      806.       /* prepare a^1 in Montgomery domain */
      807.       if (a->neg || BN_ucmp(a, m) >= 0) {
      808.           if (!BN_mod(&am, a, m, ctx))
                          ^
      809.               goto err;
      810.           if (!BN_to_montgomery(&am, &am, mont, ctx))

crypto/bn/bn_div.c:189:1: Parameter `num->top`
        187.    * If 'dv' or 'rm' is NULL, the respective value is not returned.
        188.    */
        189. > int BN_div(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num, const BIGNUM *divisor,
        190.              BN_CTX *ctx)
        191.   {

crypto/bn/bn_div.c:259:11: Call
        257.       sdiv->neg = 0;
        258.       norm_shift += BN_BITS2;
        259.       if (!(BN_lshift(snum, num, norm_shift)))
                         ^
        260.           goto err;
        261.       snum->neg = 0;

crypto/bn/bn_shift.c:130:1: <Offset trace>
128.   }
129.   
130. > int BN_lshift(BIGNUM *r, const BIGNUM *a, int n)
131.   {
132.       int i, nw, lb, rb;

crypto/bn/bn_shift.c:130:1: Parameter `n`
          128.   }
          129.   
          130. > int BN_lshift(BIGNUM *r, const BIGNUM *a, int n)
          131.   {
          132.       int i, nw, lb, rb;

crypto/bn/bn_shift.c:145:5: Assignment
          143.   
          144.       r->neg = a->neg;
          145.       nw = n / BN_BITS2;
                     ^
          146.       if (bn_wexpand(r, a->top + nw + 1) == NULL)
          147.           return (0);

crypto/bn/bn_shift.c:130:1: <Length trace>
128.   }
129.   
130. > int BN_lshift(BIGNUM *r, const BIGNUM *a, int n)
131.   {
132.       int i, nw, lb, rb;

crypto/bn/bn_shift.c:130:1: Parameter `*r->d`
          128.   }
          129.   
          130. > int BN_lshift(BIGNUM *r, const BIGNUM *a, int n)
          131.   {
          132.       int i, nw, lb, rb;

crypto/bn/bn_shift.c:146:9: Call
          144.       r->neg = a->neg;
          145.       nw = n / BN_BITS2;
          146.       if (bn_wexpand(r, a->top + nw + 1) == NULL)
                         ^
          147.           return (0);
          148.       lb = n % BN_BITS2;

crypto/bn/bn_lib.c:995:1: Parameter `*a->d`
            993.   }
            994.   
            995. > BIGNUM *bn_wexpand(BIGNUM *a, int words)
            996.   {
            997.       return (words <= a->dmax) ? a : bn_expand2(a, words);

crypto/bn/bn_shift.c:151:5: Assignment
          149.       rb = BN_BITS2 - lb;
          150.       f = a->d;
          151.       t = r->d;
                     ^
          152.       t[a->top + nw] = 0;
          153.       if (lb == 0)

crypto/bn/bn_shift.c:159:13: Array access: Offset: [1, +oo] Size: [0, 8388607] by call to `BN_mod_exp` 
          157.           for (i = a->top - 1; i >= 0; i--) {
          158.               l = f[i];
          159.               t[nw + i + 1] |= (l >> rb) & BN_MASK2;
                             ^
          160.               t[nw + i] = (l << lb) & BN_MASK2;
          161.           }
