crypto/dsa/dsa_ossl.c:421: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 536870848] by call to `BN_sub`.
Showing all 18 steps of the trace


crypto/dsa/dsa_ossl.c:419:14: Call
417.   
418.       BN_CTX_start(ctx);
419.       if ((e = BN_CTX_get(ctx)) != NULL
                    ^
420.               && BN_set_word(r, 2)
421.               && BN_sub(e, q, r)

crypto/bn/bn_ctx.c:229:5: Call
  227.       }
  228.       /* OK, make sure the returned bignum is "zero" */
  229.       BN_zero(ret);
             ^
  230.       /* clear BN_FLG_CONSTTIME if leaked from previous frames */
  231.       ret->flags &= (~BN_FLG_CONSTTIME);

crypto/bn/bn_lib.c:366:15: Assignment
    364.       a->neg = 0;
    365.       a->d[0] = w;
    366.       a->top = (w ? 1 : 0);
                         ^
    367.       a->flags &= ~BN_FLG_FIXED_TOP;
    368.       bn_check_top(a);

crypto/bn/bn_lib.c:366:5: Assignment
    364.       a->neg = 0;
    365.       a->d[0] = w;
    366.       a->top = (w ? 1 : 0);
               ^
    367.       a->flags &= ~BN_FLG_FIXED_TOP;
    368.       bn_check_top(a);

crypto/dsa/dsa_ossl.c:421:16: Call
419.       if ((e = BN_CTX_get(ctx)) != NULL
420.               && BN_set_word(r, 2)
421.               && BN_sub(e, q, r)
                      ^
422.               && BN_mod_exp_mont(r, k, e, q, ctx, NULL))
423.           res = r;

crypto/bn/bn_add.c:45:1: Parameter `*r->d`
  43.   
  44.   /* signed sub of b from a. */
  45. > int BN_sub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)
  46.   {
  47.       int ret, r_neg, cmp_res;

crypto/bn/bn_add.c:62:19: Call
  60.           } else if (cmp_res < 0) {
  61.               r_neg = !b->neg;
  62.               ret = BN_usub(r, b, a);
                          ^
  63.           } else {
  64.               r_neg = 0;

crypto/bn/bn_add.c:125:1: Parameter `*r->d`
    123.   
    124.   /* unsigned subtraction of b from a, a must be larger than b. */
    125. > int BN_usub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)
    126.   {
    127.       int max, min, dif;

crypto/bn/bn_add.c:143:9: Call
    141.       }
    142.   
    143.       if (bn_wexpand(r, max) == NULL)
                   ^
    144.           return 0;
    145.   

crypto/bn/bn_lib.c:939:1: Parameter `*a->d`
      937.   }
      938.   
      939. > BIGNUM *bn_wexpand(BIGNUM *a, int words)
      940.   {
      941.       return (words <= a->dmax) ? a : bn_expand2(a, words);

crypto/bn/bn_lib.c:941:37: Call
      939.   BIGNUM *bn_wexpand(BIGNUM *a, int words)
      940.   {
      941.       return (words <= a->dmax) ? a : bn_expand2(a, words);
                                                 ^
      942.   }
      943.   

crypto/bn/bn_lib.c:245:1: Parameter `*b->d`
        243.    */
        244.   
        245. > BIGNUM *bn_expand2(BIGNUM *b, int words)
        246.   {
        247.       if (words > b->dmax) {

crypto/bn/bn_lib.c:248:23: Call
        246.   {
        247.       if (words > b->dmax) {
        248.           BN_ULONG *a = bn_expand_internal(b, words);
                                     ^
        249.           if (!a)
        250.               return NULL;

crypto/bn/bn_lib.c:209:1: <Offset trace>
207.   /* This is used by bn_expand2() */
208.   /* The caller MUST check that words > b->dmax before calling this */
209. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
210.   {
211.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:209:1: Parameter `b->top`
          207.   /* This is used by bn_expand2() */
          208.   /* The caller MUST check that words > b->dmax before calling this */
          209. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
          210.   {
          211.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:209:1: <Length trace>
207.   /* This is used by bn_expand2() */
208.   /* The caller MUST check that words > b->dmax before calling this */
209. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
210.   {
211.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:209:1: Parameter `*b->d`
          207.   /* This is used by bn_expand2() */
          208.   /* The caller MUST check that words > b->dmax before calling this */
          209. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
          210.   {
          211.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:232:9: Array access: Offset added: [8, +oo] Size: [0, 536870848] by call to `BN_sub` 
          230.       assert(b->top <= words);
          231.       if (b->top > 0)
          232.           memcpy(a, b->d, sizeof(*a) * b->top);
                         ^
          233.   
          234.       return a;
