crypto/dsa/dsa_ossl.c:91: error: INTEGER_OVERFLOW_L2
  (0 - [0, max(1, `dsa->p->top`)]):unsigned64 by call to `dsa_sign_setup`.
Showing all 22 steps of the trace


crypto/dsa/dsa_ossl.c:59:1: Parameter `dsa->p->top`
57.   }
58.   
59. > static DSA_SIG *dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
60.   {
61.       BIGNUM *kinv = NULL;

crypto/dsa/dsa_ossl.c:91:10: Call
89.           goto err;
90.    redo:
91.       if (!dsa_sign_setup(dsa, ctx, &kinv, &ret->r, dgst, dlen))
               ^
92.           goto err;
93.   

crypto/dsa/dsa_ossl.c:143:1: Parameter `dsa->p->top`
  141.   }
  142.   
  143. > static int dsa_sign_setup(DSA *dsa, BN_CTX *ctx_in,
  144.                             BIGNUM **kinvp, BIGNUM **rp,
  145.                             const unsigned char *dgst, int dlen)

crypto/dsa/dsa_ossl.c:222:18: Call
  220.                   goto err;
  221.       } else {
  222.               if (!BN_mod_exp_mont(r, dsa->g, k, dsa->p, ctx, dsa->method_mont_p))
                          ^
  223.                   goto err;
  224.       }

crypto/bn/bn_exp.c:296:1: Parameter `m->top`
    294.   }
    295.   
    296. > int BN_mod_exp_mont(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p,
    297.                       const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
    298.   {

crypto/bn/bn_exp.c:310:16: Call
    308.               || BN_get_flags(a, BN_FLG_CONSTTIME) != 0
    309.               || BN_get_flags(m, BN_FLG_CONSTTIME) != 0) {
    310.           return BN_mod_exp_mont_consttime(rr, a, p, m, ctx, in_mont);
                          ^
    311.       }
    312.   

crypto/bn/bn_exp.c:745:14: Assignment
      743.           /* 2^(top*BN_BITS2) - m */
      744.           tmp.d[0] = (0 - m->d[0]) & BN_MASK2;
      745.           for (i = 1; i < top; i++)
                          ^
      746.               tmp.d[i] = (~m->d[i]) & BN_MASK2;
      747.           tmp.top = top;

crypto/bn/bn_exp.c:1051:14: Call
      1049.           bits -= window0;
      1050.           wvalue = bn_get_bits(p, bits) & wmask;
      1051.           if (!MOD_EXP_CTIME_COPY_FROM_PREBUF(&tmp, top, powerbuf, wvalue,
                           ^
      1052.                                               window))
      1053.               goto err;

crypto/bn/bn_exp.c:520:1: Parameter `top`
        518.   }
        519.   
        520. > static int MOD_EXP_CTIME_COPY_FROM_PREBUF(BIGNUM *b, int top,
        521.                                             unsigned char *buf, int idx,
        522.                                             int window)

crypto/bn/bn_exp.c:577:5: Assignment
        575.       }
        576.   
        577.       b->top = top;
                   ^
        578.       bn_correct_top(b);
        579.       return 1;

crypto/bn/bn_exp.c:578:5: Call
        576.   
        577.       b->top = top;
        578.       bn_correct_top(b);
                   ^
        579.       return 1;
        580.   }

crypto/bn/bn_lib.c:946:1: Parameter `a->top`
          944.   }
          945.   
          946. > void bn_correct_top(BIGNUM *a)
          947.   {
          948.       BN_ULONG *ftl;

crypto/bn/bn_exp.c:1064:22: Call
      1062.               /* Square the result window-size times */
      1063.               for (i = 0; i < window; i++)
      1064.                   if (!BN_mod_mul_montgomery(&tmp, &tmp, &tmp, mont, ctx))
                                   ^
      1065.                       goto err;
      1066.   

crypto/bn/bn_mont.c:26:1: Parameter `a->top`
        24.   #endif
        25.   
        26. > int BN_mod_mul_montgomery(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
        27.                             BN_MONT_CTX *mont, BN_CTX *ctx)
        28.   {

crypto/bn/bn_mont.c:53:14: Call
        51.       bn_check_top(tmp);
        52.       if (a == b) {
        53.           if (!BN_sqr(tmp, a, ctx))
                           ^
        54.               goto err;
        55.       } else {

crypto/bn/bn_sqr.c:17:1: Parameter `a->top`
          15.    * I've just gone over this and it is now %20 faster on x86 - eay - 27 Jun 96
          16.    */
          17. > int BN_sqr(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
          18.   {
          19.       int max, al;

crypto/bn/bn_sqr.c:25:5: Assignment
          23.       bn_check_top(a);
          24.   
          25.       al = a->top;
                    ^
          26.       if (al <= 0) {
          27.           r->top = 0;

crypto/bn/bn_sqr.c:64:17: Call
          62.               int j, k;
          63.   
          64.               j = BN_num_bits_word((BN_ULONG)al);
                                ^
          65.               j = 1 << (j - 1);
          66.               k = j + j;

crypto/bn/bn_lib.c:89:1: <RHS trace>
87.   }
88.   
89. > int BN_num_bits_word(BN_ULONG l)
90.   {
91.       BN_ULONG x, mask;

crypto/bn/bn_lib.c:89:1: Parameter `l`
            87.   }
            88.   
            89. > int BN_num_bits_word(BN_ULONG l)
            90.   {
            91.       BN_ULONG x, mask;

crypto/bn/bn_lib.c:95:5: Assignment
            93.   
            94.   #if BN_BITS2 > 32
            95.       x = l >> 32;
                      ^
            96.       mask = (0 - x) & BN_MASK2;
            97.       mask = (0 - (mask >> (BN_BITS2 - 1)));

crypto/bn/bn_lib.c:96:5: Binary operation: (0 - [0, max(1, dsa->p->top)]):unsigned64 by call to `dsa_sign_setup` 
            94.   #if BN_BITS2 > 32
            95.       x = l >> 32;
            96.       mask = (0 - x) & BN_MASK2;
                      ^
            97.       mask = (0 - (mask >> (BN_BITS2 - 1)));
            98.       bits += 32 & mask;
