crypto/bn/bn_print.c:236: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 67108856] by call to `bn_expand`.
Showing all 18 steps of the trace


crypto/bn/bn_print.c:199:1: Parameter `(*bn)->top`
197.   }
198.   
199. > int BN_dec2bn(BIGNUM **bn, const char *a)
200.   {
201.       BIGNUM *ret = NULL;

crypto/bn/bn_print.c:236:9: Call
234.   
235.       /* i is the number of digits, a bit of an over expand */
236.       if (bn_expand(ret, i * 4) == NULL)
               ^
237.           goto err;
238.   

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:244:1: Parameter `b->top`
    242.    */
    243.   
    244. > BIGNUM *bn_expand2(BIGNUM *b, int words)
    245.   {
    246.       if (words > b->dmax) {

crypto/bn/bn_lib.c:247:23: Call
    245.   {
    246.       if (words > b->dmax) {
    247.           BN_ULONG *a = bn_expand_internal(b, words);
                                 ^
    248.           if (!a)
    249.               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:223:13: Call
      221.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
      222.       else
      223.           a = OPENSSL_zalloc(words * sizeof(*a));
                         ^
      224.       if (a == NULL) {
      225.           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:223:9: Assignment
      221.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
      222.       else
      223.           a = OPENSSL_zalloc(words * sizeof(*a));
                     ^
      224.       if (a == NULL) {
      225.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

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

static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
{
    BN_ULONG *a = NULL;
    if (words > (INT_MAX / (4 * BN_BITS2))) {
        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_BIGNUM_TOO_LONG);
        return NULL;
    }
    if (BN_get_flags(b, BN_FLG_STATIC_DATA)) {
        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_EXPAND_ON_STATIC_BIGNUM_DATA);
        return NULL;
    }
    if (BN_get_flags(b, BN_FLG_SECURE))
        a = OPENSSL_secure_zalloc(words * sizeof(*a));
    else
        a = OPENSSL_zalloc(words * sizeof(*a));
    if (a == NULL) {
        BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);
        return NULL;
    }
    assert(b->top <= words);
    if (b->top > 0)
        memcpy(a, b->d, sizeof(*a) * b->top);
    return a;
}
["int BN_dec2bn(BIGNUM **bn, const char *a)\n{\n    BIGNUM *ret = NULL;\n    BN_ULONG l = 0;\n    int neg = 0, i, j;\n    int num;\n    if (a == NULL || *a == '\\0')\n        return 0;\n    if (*a == '-') {\n        neg = 1;\n        a++;\n    }\n    for (i = 0; i <= INT_MAX / 4 && ossl_isdigit(a[i]); i++)\n        continue;\n    if (i == 0 || i > INT_MAX / 4)\n        goto err;\n    num = i + neg;\n    if (bn == NULL)\n        return num;\n    if (*bn == NULL) {\n        if ((ret = BN_new()) == NULL)\n            return 0;\n    } else {\n        ret = *bn;\n        BN_zero(ret);\n    }\n    if (bn_expand(ret, i * 4) == NULL)\n        goto err;\n    j = BN_DEC_NUM - i % BN_DEC_NUM;\n    if (j == BN_DEC_NUM)\n        j = 0;\n    l = 0;\n    while (--i >= 0) {\n        l *= 10;\n        l += *a - '0';\n        a++;\n        if (++j == BN_DEC_NUM) {\n            if (!BN_mul_word(ret, BN_DEC_CONV)\n                || !BN_add_word(ret, l))\n                goto err;\n            l = 0;\n            j = 0;\n        }\n    }\n    bn_correct_top(ret);\n    *bn = ret;\n    bn_check_top(ret);\n    if (ret->top != 0)\n        ret->neg = neg;\n    return num;\n err:\n    if (*bn == NULL)\n        BN_free(ret);\n    return 0;\n}", 'static ossl_inline BIGNUM *bn_expand(BIGNUM *a, int bits)\n{\n    if (bits > (INT_MAX - BN_BITS2 + 1))\n        return NULL;\n    if (((bits+BN_BITS2-1)/BN_BITS2) <= (a)->dmax)\n        return a;\n    return bn_expand2((a),(bits+BN_BITS2-1)/BN_BITS2);\n}', 'BIGNUM *bn_expand2(BIGNUM *b, int words)\n{\n    if (words > b->dmax) {\n        BN_ULONG *a = bn_expand_internal(b, words);\n        if (!a)\n            return NULL;\n        if (b->d) {\n            OPENSSL_cleanse(b->d, b->dmax * sizeof(b->d[0]));\n            bn_free_d(b);\n        }\n        b->d = a;\n        b->dmax = words;\n    }\n    return b;\n}', 'static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)\n{\n    BN_ULONG *a = NULL;\n    if (words > (INT_MAX / (4 * BN_BITS2))) {\n        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_BIGNUM_TOO_LONG);\n        return NULL;\n    }\n    if (BN_get_flags(b, BN_FLG_STATIC_DATA)) {\n        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_EXPAND_ON_STATIC_BIGNUM_DATA);\n        return NULL;\n    }\n    if (BN_get_flags(b, BN_FLG_SECURE))\n        a = OPENSSL_secure_zalloc(words * sizeof(*a));\n    else\n        a = OPENSSL_zalloc(words * sizeof(*a));\n    if (a == NULL) {\n        BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);\n        return NULL;\n    }\n    assert(b->top <= words);\n    if (b->top > 0)\n        memcpy(a, b->d, sizeof(*a) * b->top);\n    return a;\n}', 'void *CRYPTO_zalloc(size_t num, const char *file, int line)\n{\n    void *ret = CRYPTO_malloc(num, file, line);\n    FAILTEST();\n    if (ret != NULL)\n        memset(ret, 0, num);\n    return ret;\n}', 'void *CRYPTO_malloc(size_t num, const char *file, int line)\n{\n    void *ret = NULL;\n    INCREMENT(malloc_count);\n    if (malloc_impl != NULL && malloc_impl != CRYPTO_malloc)\n        return malloc_impl(num, file, line);\n    if (num == 0)\n        return NULL;\n    FAILTEST();\n    if (allow_customize) {\n        allow_customize = 0;\n    }\n#ifndef OPENSSL_NO_CRYPTO_MDEBUG\n    if (call_malloc_debug) {\n        CRYPTO_mem_debug_malloc(NULL, num, 0, file, line);\n        ret = malloc(num);\n        CRYPTO_mem_debug_malloc(ret, num, 1, file, line);\n    } else {\n        ret = malloc(num);\n    }\n#else\n    (void)(file); (void)(line);\n    ret = malloc(num);\n#endif\n    return ret;\n}']