crypto/bn/bn_exp.c:1051: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 67108856] by call to `MOD_EXP_CTIME_COPY_FROM_PREBUF`.
Showing all 23 steps of the trace


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:747:9: Assignment
745.           for (i = 1; i < top; i++)
746.               tmp.d[i] = (~m->d[i]) & BN_MASK2;
747.           tmp.top = top;
               ^
748.       } else
749.   #endif

crypto/bn/bn_exp.c:1014:14: Call
1012.   #endif
1013.       {
1014.           if (!MOD_EXP_CTIME_COPY_TO_PREBUF(&tmp, top, powerbuf, 0, window))
                     ^
1015.               goto err;
1016.           if (!MOD_EXP_CTIME_COPY_TO_PREBUF(&am, top, powerbuf, 1, window))

crypto/bn/bn_exp.c:502:1: Parameter `top`
  500.    */
  501.   
  502. > static int MOD_EXP_CTIME_COPY_TO_PREBUF(const BIGNUM *b, int top,
  503.                                           unsigned char *buf, int idx,
  504.                                           int window)

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 `b->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:536:9: Call
  534.       volatile BN_ULONG *table = (volatile BN_ULONG *)buf;
  535.   
  536.       if (bn_wexpand(b, top) == NULL)
                 ^
  537.           return 0;
  538.   

crypto/bn/bn_lib.c:941:1: Parameter `a->top`
    939.   }
    940.   
    941. > BIGNUM *bn_wexpand(BIGNUM *a, int words)
    942.   {
    943.       return (words <= a->dmax) ? a : bn_expand2(a, words);

crypto/bn/bn_lib.c:943:37: Call
    941.   BIGNUM *bn_wexpand(BIGNUM *a, int words)
    942.   {
    943.       return (words <= a->dmax) ? a : bn_expand2(a, words);
                                               ^
    944.   }
    945.   

crypto/bn/bn_lib.c:246:1: Parameter `b->top`
      244.    */
      245.   
      246. > BIGNUM *bn_expand2(BIGNUM *b, int words)
      247.   {
      248.       bn_check_top(b);

crypto/bn/bn_lib.c:251:23: Call
      249.   
      250.       if (words > b->dmax) {
      251.           BN_ULONG *a = bn_expand_internal(b, words);
                                   ^
      252.           if (!a)
      253.               return NULL;

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

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

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

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

crypto/bn/bn_lib.c:225:13: Call
        223.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
        224.       else
        225.           a = OPENSSL_zalloc(words * sizeof(*a));
                           ^
        226.       if (a == NULL) {
        227.           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:225:9: Assignment
        223.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
        224.       else
        225.           a = OPENSSL_zalloc(words * sizeof(*a));
                       ^
        226.       if (a == NULL) {
        227.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

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