crypto/bn/bn_mod.c:227: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_div`.
Showing all 30 steps of the trace


crypto/bn/bn_mod.c:224:10: Call
222.   int BN_mod_sqr(BIGNUM *r, const BIGNUM *a, const BIGNUM *m, BN_CTX *ctx)
223.   {
224.       if (!BN_sqr(r, a, ctx))
                ^
225.           return 0;
226.       /* r->neg == 0,  thus we don't need BN_nnmod */

crypto/bn/bn_sqr.c:19:15: Call
  17.   int BN_sqr(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
  18.   {
  19.       int ret = bn_sqr_fixed_top(r, a, ctx);
                      ^
  20.   
  21.       bn_correct_top(r);

crypto/bn/bn_sqr.c:27:1: Parameter `r->top`
    25.   }
    26.   
    27. > int bn_sqr_fixed_top(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
    28.   {
    29.       int max, al;

crypto/bn/bn_sqr.c:21:5: Call
  19.       int ret = bn_sqr_fixed_top(r, a, ctx);
  20.   
  21.       bn_correct_top(r);
            ^
  22.       bn_check_top(r);
  23.   

crypto/bn/bn_lib.c:965:1: Parameter `a->top`
    963.   }
    964.   
    965. > void bn_correct_top(BIGNUM *a)
    966.   {
    967.       BN_ULONG *ftl;

crypto/bn/bn_mod.c:227:12: Call
225.           return 0;
226.       /* r->neg == 0,  thus we don't need BN_nnmod */
227.       return BN_mod(r, r, m, ctx);
                  ^
228.   }
229.   

crypto/bn/bn_div.c:209:1: Parameter `rm->top`
  207.    * If 'dv' or 'rm' is NULL, the respective value is not returned.
  208.    */
  209. > int BN_div(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num, const BIGNUM *divisor,
  210.              BN_CTX *ctx)
  211.   {

crypto/bn/bn_div.c:229:11: Call
  227.       }
  228.   
  229.       ret = bn_div_fixed_top(dv, rm, num, divisor, ctx);
                   ^
  230.   
  231.       if (ret) {

crypto/bn/bn_div.c:264:1: Parameter `rm->top`
    262.    *       divisor's length is considered public;
    263.    */
    264. > int bn_div_fixed_top(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num,
    265.                        const BIGNUM *divisor, BN_CTX *ctx)
    266.   {

crypto/bn/bn_div.c:449:9: Call
    447.       snum->flags |= BN_FLG_FIXED_TOP;
    448.       if (rm != NULL)
    449.           bn_rshift_fixed_top(rm, snum, norm_shift);
                   ^
    450.       BN_CTX_end(ctx);
    451.       return 1;

crypto/bn/bn_shift.c:214:1: Parameter `r->top`
      212.    * |n < BN_BITS2| or |n / BN_BITS2| being non-secret.
      213.    */
      214. > int bn_rshift_fixed_top(BIGNUM *r, const BIGNUM *a, int n)
      215.   {
      216.       int i, top, nw;

crypto/bn/bn_shift.c:229:9: Call
      227.       if (nw >= a->top) {
      228.           /* shouldn't happen, but formally required */
      229.           BN_zero(r);
                     ^
      230.           return 1;
      231.       }

crypto/bn/bn_lib.c:359:1: Parameter `a->top`
        357.   }
        358.   
        359. > int BN_set_word(BIGNUM *a, BN_ULONG w)
        360.   {
        361.       bn_check_top(a);

crypto/bn/bn_lib.c:362:9: Call
        360.   {
        361.       bn_check_top(a);
        362.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                       ^
        363.           return 0;
        364.       a->neg = 0;

crypto/bn/bn_lcl.h:660:1: Parameter `a->top`
          658.                            const BIGNUM *add, const BIGNUM *rem, BN_CTX *ctx);
          659.   
          660. > static ossl_inline BIGNUM *bn_expand(BIGNUM *a, int bits)
          661.   {
          662.       if (bits > (INT_MAX - BN_BITS2 + 1))

crypto/bn/bn_lcl.h:668:12: Call
          666.           return a;
          667.   
          668.       return bn_expand2((a),(bits+BN_BITS2-1)/BN_BITS2);
                            ^
          669.   }
          670.   

crypto/bn/bn_lib.c:245:1: Parameter `b->top`
            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 `words`
              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:224:13: Call
              222.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
              223.       else
              224.           a = OPENSSL_zalloc(words * sizeof(*a));
                                 ^
              225.       if (a == NULL) {
              226.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

crypto/mem.c:228:1: Parameter `num`
                226.   }
                227.   
                228. > void *CRYPTO_zalloc(size_t num, const char *file, int line)
                229.   {
                230.       void *ret = CRYPTO_malloc(num, file, line);

crypto/mem.c:230:17: Call
                228.   void *CRYPTO_zalloc(size_t num, const char *file, int line)
                229.   {
                230.       void *ret = CRYPTO_malloc(num, file, line);
                                       ^
                231.   
                232.       FAILTEST();

crypto/mem.c:201:9: Assignment
                  199.   
                  200.       if (num == 0)
                  201.           return NULL;
                                 ^
                  202.   
                  203.       FAILTEST();

crypto/mem.c:230:5: Assignment
                228.   void *CRYPTO_zalloc(size_t num, const char *file, int line)
                229.   {
                230.       void *ret = CRYPTO_malloc(num, file, line);
                           ^
                231.   
                232.       FAILTEST();

crypto/mem.c:235:5: Assignment
                233.       if (ret != NULL)
                234.           memset(ret, 0, num);
                235.       return ret;
                           ^
                236.   }
                237.   

crypto/bn/bn_lib.c:224:9: Assignment
              222.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
              223.       else
              224.           a = OPENSSL_zalloc(words * sizeof(*a));
                             ^
              225.       if (a == NULL) {
              226.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

crypto/bn/bn_lib.c:232:9: Array access: Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_div` 
              230.       assert(b->top <= words);
              231.       if (b->top > 0)
              232.           memcpy(a, b->d, sizeof(*a) * b->top);
                             ^
              233.   
              234.       return a;
