crypto/dsa/dsa_key.c:41: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_priv_rand_range`.
Showing all 24 steps of the trace


crypto/dsa/dsa_key.c:25:1: Parameter `dsa->priv_key->top`
23.   }
24.   
25. > static int dsa_builtin_keygen(DSA *dsa)
26.   {
27.       int ok = 0;

crypto/dsa/dsa_key.c:41:14: Call
39.   
40.       do
41.           if (!BN_priv_rand_range(priv_key, dsa->q))
                   ^
42.               goto err;
43.       while (BN_is_zero(priv_key)) ;

crypto/bn/bn_rand.c:208:1: Parameter `r->top`
  206.   }
  207.   
  208. > int BN_priv_rand_range(BIGNUM *r, const BIGNUM *range)
  209.   {
  210.       return bnrand_range(PRIVATE, r, range, NULL);

crypto/bn/bn_rand.c:210:12: Call
  208.   int BN_priv_rand_range(BIGNUM *r, const BIGNUM *range)
  209.   {
  210.       return bnrand_range(PRIVATE, r, range, NULL);
                    ^
  211.   }
  212.   

crypto/bn/bn_rand.c:127:1: Parameter `r->top`
    125.   
    126.   /* random number r:  0 <= r < range */
    127. > static int bnrand_range(BNRAND_FLAG flag, BIGNUM *r, const BIGNUM *range,
    128.                           BN_CTX *ctx)
    129.   {

crypto/bn/bn_rand.c:143:9: Call
    141.   
    142.       if (n == 1)
    143.           BN_zero(r);
                   ^
    144.       else if (!BN_is_bit_set(range, n - 2) && !BN_is_bit_set(range, n - 3)) {
    145.           /*

crypto/bn/bn_lib.c:361:1: Parameter `a->top`
      359.   }
      360.   
      361. > int BN_set_word(BIGNUM *a, BN_ULONG w)
      362.   {
      363.       bn_check_top(a);

crypto/bn/bn_lib.c:364:9: Call
      362.   {
      363.       bn_check_top(a);
      364.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                     ^
      365.           return 0;
      366.       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_priv_rand_range` 
            230.       assert(b->top <= words);
            231.       if (b->top > 0)
            232.           memcpy(a, b->d, sizeof(*a) * b->top);
                           ^
            233.   
            234.       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;
}
['static int dsa_builtin_keygen(DSA *dsa)\n{\n    int ok = 0;\n    BN_CTX *ctx = NULL;\n    BIGNUM *pub_key = NULL, *priv_key = NULL;\n    if ((ctx = BN_CTX_new()) == NULL)\n        goto err;\n    if (dsa->priv_key == NULL) {\n        if ((priv_key = BN_secure_new()) == NULL)\n            goto err;\n    } else\n        priv_key = dsa->priv_key;\n    do\n        if (!BN_priv_rand_range(priv_key, dsa->q))\n            goto err;\n    while (BN_is_zero(priv_key)) ;\n    if (dsa->pub_key == NULL) {\n        if ((pub_key = BN_new()) == NULL)\n            goto err;\n    } else\n        pub_key = dsa->pub_key;\n    {\n        BIGNUM *prk = BN_new();\n        if (prk == NULL)\n            goto err;\n        BN_with_flags(prk, priv_key, BN_FLG_CONSTTIME);\n        if (!BN_mod_exp(pub_key, dsa->g, prk, dsa->p, ctx)) {\n            BN_free(prk);\n            goto err;\n        }\n        BN_free(prk);\n    }\n    dsa->priv_key = priv_key;\n    dsa->pub_key = pub_key;\n    ok = 1;\n err:\n    if (pub_key != dsa->pub_key)\n        BN_free(pub_key);\n    if (priv_key != dsa->priv_key)\n        BN_free(priv_key);\n    BN_CTX_free(ctx);\n    return ok;\n}', 'int BN_priv_rand_range(BIGNUM *r, const BIGNUM *range)\n{\n    return bnrand_range(PRIVATE, r, range, NULL);\n}', 'static int bnrand_range(BNRAND_FLAG flag, BIGNUM *r, const BIGNUM *range,\n                        BN_CTX *ctx)\n{\n    int n;\n    int count = 100;\n    if (range->neg || BN_is_zero(range)) {\n        BNerr(BN_F_BNRAND_RANGE, BN_R_INVALID_RANGE);\n        return 0;\n    }\n    n = BN_num_bits(range);\n    if (n == 1)\n        BN_zero(r);\n    else if (!BN_is_bit_set(range, n - 2) && !BN_is_bit_set(range, n - 3)) {\n        do {\n            if (!bnrand(flag, r, n + 1, BN_RAND_TOP_ANY, BN_RAND_BOTTOM_ANY,\n                        ctx))\n                return 0;\n            if (BN_cmp(r, range) >= 0) {\n                if (!BN_sub(r, r, range))\n                    return 0;\n                if (BN_cmp(r, range) >= 0)\n                    if (!BN_sub(r, r, range))\n                        return 0;\n            }\n            if (!--count) {\n                BNerr(BN_F_BNRAND_RANGE, BN_R_TOO_MANY_ITERATIONS);\n                return 0;\n            }\n        }\n        while (BN_cmp(r, range) >= 0);\n    } else {\n        do {\n            if (!bnrand(flag, r, n, BN_RAND_TOP_ANY, BN_RAND_BOTTOM_ANY, ctx))\n                return 0;\n            if (!--count) {\n                BNerr(BN_F_BNRAND_RANGE, BN_R_TOO_MANY_ITERATIONS);\n                return 0;\n            }\n        }\n        while (BN_cmp(r, range) >= 0);\n    }\n    bn_check_top(r);\n    return 1;\n}', 'int BN_set_word(BIGNUM *a, BN_ULONG w)\n{\n    bn_check_top(a);\n    if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)\n        return 0;\n    a->neg = 0;\n    a->d[0] = w;\n    a->top = (w ? 1 : 0);\n    a->flags &= ~BN_FLG_FIXED_TOP;\n    bn_check_top(a);\n    return 1;\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#if !defined(OPENSSL_NO_CRYPTO_MDEBUG) && !defined(FIPS_MODE)\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}']