crypto/dsa/dsa_ossl.c:92: 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:92:10: Call
90.   
91.    redo:
92.       if (!dsa_sign_setup(dsa, ctx, &kinv, &ret->r, dgst, dlen))
               ^
93.           goto err;
94.   

crypto/dsa/dsa_ossl.c:175:1: Parameter `dsa->p->top`
  173.   }
  174.   
  175. > static int dsa_sign_setup(DSA *dsa, BN_CTX *ctx_in,
  176.                             BIGNUM **kinvp, BIGNUM **rp,
  177.                             const unsigned char *dgst, int dlen)

crypto/dsa/dsa_ossl.c:254:18: Call
  252.                   goto err;
  253.       } else {
  254.               if (!BN_mod_exp_mont(r, dsa->g, k, dsa->p, ctx, dsa->method_mont_p))
                          ^
  255.                   goto err;
  256.       }

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:1062:14: Call
      1060.           bits -= window0;
      1061.           wvalue = bn_get_bits(p, bits) & wmask;
      1062.           if (!MOD_EXP_CTIME_COPY_FROM_PREBUF(&tmp, top, powerbuf, wvalue,
                           ^
      1063.                                               window))
      1064.               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:1098:18: Call
      1096.   
      1097.               /* Multiply the result into the intermediate result */
      1098.               if (!BN_mod_mul_montgomery(&tmp, &tmp, &am, mont, ctx))
                               ^
      1099.                   goto err;
      1100.           }

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:56:14: Call
        54.               goto err;
        55.       } else {
        56.           if (!BN_mul(tmp, a, b, ctx))
                           ^
        57.               goto err;
        58.       }

crypto/bn/bn_mul.c:497:1: Parameter `a->top`
          495.   #endif                          /* BN_RECURSION */
          496.   
          497. > int BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
          498.   {
          499.       int ret = 0;

crypto/bn/bn_mul.c:514:5: Assignment
          512.       bn_check_top(r);
          513.   
          514.       al = a->top;
                     ^
          515.       bl = b->top;
          516.   

crypto/bn/bn_mul.c:561:21: Call
          559.                */
          560.               if (i >= 0) {
          561.                   j = BN_num_bits_word((BN_ULONG)al);
                                     ^
          562.               }
          563.               if (i == -1) {

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;
