crypto/bn/bn_exp.c:1305: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_mod_mul`.
Showing all 29 steps of the trace


crypto/bn/bn_exp.c:1305:22: Call
1303.           if (BN_is_bit_set(p, wstart) == 0) {
1304.               if (!start)
1305.                   if (!BN_mod_mul(r, r, r, m, ctx))
                             ^
1306.                       goto err;
1307.               if (wstart == 0)

crypto/bn/bn_mod.c:73:1: Parameter `r->top`
  71.   
  72.   /* slow but works */
  73. > int BN_mod_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m,
  74.                  BN_CTX *ctx)
  75.   {

crypto/bn/bn_exp.c:1305:22: Call
1303.           if (BN_is_bit_set(p, wstart) == 0) {
1304.               if (!start)
1305.                   if (!BN_mod_mul(r, r, r, m, ctx))
                             ^
1306.                       goto err;
1307.               if (wstart == 0)

crypto/bn/bn_mod.c:73:1: Parameter `r->top`
  71.   
  72.   /* slow but works */
  73. > int BN_mod_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m,
  74.                  BN_CTX *ctx)
  75.   {

crypto/bn/bn_mod.c:93:10: Call
  91.               goto err;
  92.       }
  93.       if (!BN_nnmod(r, t, m, ctx))
                 ^
  94.           goto err;
  95.       bn_check_top(r);

crypto/bn/bn_mod.c:13:1: Parameter `r->top`
    11.   #include "bn_lcl.h"
    12.   
    13. > int BN_nnmod(BIGNUM *r, const BIGNUM *m, const BIGNUM *d, BN_CTX *ctx)
    14.   {
    15.       /*

crypto/bn/bn_mod.c:20:11: Call
    18.        */
    19.   
    20.       if (!(BN_mod(r, m, d, ctx)))
                    ^
    21.           return 0;
    22.       if (!r->neg)

crypto/bn/bn_div.c:140:1: Parameter `rm->top`
      138.    * If 'dv' or 'rm' is NULL, the respective value is not returned.
      139.    */
      140. > int BN_div(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num, const BIGNUM *divisor,
      141.              BN_CTX *ctx)
      142.   {

crypto/bn/bn_div.c:409:9: Call
      407.            */
      408.           int neg = num->neg;
      409.           BN_rshift(rm, snum, norm_shift);
                     ^
      410.           if (!BN_is_zero(rm))
      411.               rm->neg = neg;

crypto/bn/bn_shift.c:122:1: Parameter `r->top`
        120.   }
        121.   
        122. > int BN_rshift(BIGNUM *r, const BIGNUM *a, int n)
        123.   {
        124.       int i, j, nw, lb, rb;

crypto/bn/bn_shift.c:140:9: Call
        138.       lb = BN_BITS2 - rb;
        139.       if (nw >= a->top || a->top == 0) {
        140.           BN_zero(r);
                       ^
        141.           return (1);
        142.       }

crypto/bn/bn_lib.c:395:1: Parameter `a->top`
          393.   }
          394.   
          395. > int BN_set_word(BIGNUM *a, BN_ULONG w)
          396.   {
          397.       bn_check_top(a);

crypto/bn/bn_lib.c:398:9: Call
          396.   {
          397.       bn_check_top(a);
          398.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                         ^
          399.           return (0);
          400.       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:284:1: Parameter `b->top`
              282.    */
              283.   
              284. > BIGNUM *bn_expand2(BIGNUM *b, int words)
              285.   {
              286.       bn_check_top(b);

crypto/bn/bn_lib.c:289:23: Call
              287.   
              288.       if (words > b->dmax) {
              289.           BN_ULONG *a = bn_expand_internal(b, words);
                                           ^
              290.           if (!a)
              291.               return NULL;

crypto/bn/bn_lib.c:246:1: <Offset trace>
244.   /* This is used by bn_expand2() */
245.   /* The caller MUST check that words > b->dmax before calling this */
246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
247.   {
248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:246:1: Parameter `b->top`
                244.   /* This is used by bn_expand2() */
                245.   /* The caller MUST check that words > b->dmax before calling this */
                246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
                247.   {
                248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:246:1: <Length trace>
244.   /* This is used by bn_expand2() */
245.   /* The caller MUST check that words > b->dmax before calling this */
246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
247.   {
248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:246:1: Parameter `words`
                244.   /* This is used by bn_expand2() */
                245.   /* The caller MUST check that words > b->dmax before calling this */
                246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
                247.   {
                248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:263:13: Call
                261.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
                262.       else
                263.           a = OPENSSL_zalloc(words * sizeof(*a));
                                   ^
                264.       if (a == NULL) {
                265.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

crypto/mem.c:186:1: Parameter `num`
                  184.   }
                  185.   
                  186. > void *CRYPTO_zalloc(size_t num, const char *file, int line)
                  187.   {
                  188.       void *ret = CRYPTO_malloc(num, file, line);

crypto/mem.c:188:17: Call
                  186.   void *CRYPTO_zalloc(size_t num, const char *file, int line)
                  187.   {
                  188.       void *ret = CRYPTO_malloc(num, file, line);
                                         ^
                  189.   
                  190.       FAILTEST();

crypto/mem.c:166:9: Assignment
                    164.   
                    165.       if (num == 0)
                    166.           return NULL;
                                   ^
                    167.   
                    168.       FAILTEST();

crypto/mem.c:188:5: Assignment
                  186.   void *CRYPTO_zalloc(size_t num, const char *file, int line)
                  187.   {
                  188.       void *ret = CRYPTO_malloc(num, file, line);
                             ^
                  189.   
                  190.       FAILTEST();

crypto/mem.c:193:5: Assignment
                  191.       if (ret != NULL)
                  192.           memset(ret, 0, num);
                  193.       return ret;
                             ^
                  194.   }
                  195.   

crypto/bn/bn_lib.c:263:9: Assignment
                261.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
                262.       else
                263.           a = OPENSSL_zalloc(words * sizeof(*a));
                               ^
                264.       if (a == NULL) {
                265.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

crypto/bn/bn_lib.c:271:9: Array access: Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_mod_mul` 
                269.       assert(b->top <= words);
                270.       if (b->top > 0)
                271.           memcpy(a, b->d, sizeof(*a) * b->top);
                               ^
                272.   
                273.       return a;
