crypto/rsa/rsa_gen.c:97: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 536870848] by call to `BN_gcd`.
Showing all 12 steps of the trace


crypto/rsa/rsa_gen.c:88:9: Call
86.           goto err;
87.   
88.       if (BN_copy(rsa->e, e_value) == NULL)
              ^
89.           goto err;
90.   

crypto/bn/bn_lib.c:323:1: Parameter `a->top`
  321.   }
  322.   
  323. > BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)
  324.   {
  325.       bn_check_top(b);

crypto/rsa/rsa_gen.c:97:14: Call
95.           if (!BN_sub(r2, rsa->p, BN_value_one()))
96.               goto err;
97.           if (!BN_gcd(r1, r2, rsa->e, ctx))
                    ^
98.               goto err;
99.           if (BN_is_one(r1))

crypto/bn/bn_gcd.c:15:1: Parameter `in_b->top`
  13.   static BIGNUM *euclid(BIGNUM *a, BIGNUM *b);
  14.   
  15. > int BN_gcd(BIGNUM *r, const BIGNUM *in_a, const BIGNUM *in_b, BN_CTX *ctx)
  16.   {
  17.       BIGNUM *a, *b, *t;

crypto/bn/bn_gcd.c:31:9: Call
  29.       if (BN_copy(a, in_a) == NULL)
  30.           goto err;
  31.       if (BN_copy(b, in_b) == NULL)
                ^
  32.           goto err;
  33.       a->neg = 0;

crypto/bn/bn_lib.c:323:1: <Offset trace>
321.   }
322.   
323. > BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)
324.   {
325.       bn_check_top(b);

crypto/bn/bn_lib.c:323:1: Parameter `b->top`
    321.   }
    322.   
    323. > BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)
    324.   {
    325.       bn_check_top(b);

crypto/bn/bn_lib.c:323:1: <Length trace>
321.   }
322.   
323. > BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)
324.   {
325.       bn_check_top(b);

crypto/bn/bn_lib.c:323:1: Parameter `*a->d`
    321.   }
    322.   
    323. > BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)
    324.   {
    325.       bn_check_top(b);

crypto/bn/bn_lib.c:329:9: Call
    327.       if (a == b)
    328.           return a;
    329.       if (bn_wexpand(a, b->top) == NULL)
                   ^
    330.           return NULL;
    331.   

crypto/bn/bn_lib.c:951:1: Parameter `*a->d`
      949.   }
      950.   
      951. > BIGNUM *bn_wexpand(BIGNUM *a, int words)
      952.   {
      953.       return (words <= a->dmax) ? a : bn_expand2(a, words);

crypto/bn/bn_lib.c:333:9: Array access: Offset added: [8, +oo] Size: [0, 536870848] by call to `BN_gcd` 
    331.   
    332.       if (b->top > 0)
    333.           memcpy(a->d, b->d, sizeof(b->d[0]) * b->top);
                   ^
    334.   
    335.       if (BN_get_flags(b, BN_FLG_CONSTTIME) != 0)

BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)
{
    bn_check_top(b);
    if (a == b)
        return a;
    if (bn_wexpand(a, b->top) == NULL)
        return NULL;
    if (b->top > 0)
        memcpy(a->d, b->d, sizeof(b->d[0]) * b->top);
    if (BN_get_flags(b, BN_FLG_CONSTTIME) != 0)
        BN_set_flags(a, BN_FLG_CONSTTIME);
    a->top = b->top;
    a->neg = b->neg;
    bn_check_top(a);
    return a;
}
['static int rsa_builtin_keygen(RSA *rsa, int bits, BIGNUM *e_value,\n                              BN_GENCB *cb)\n{\n    BIGNUM *r0 = NULL, *r1 = NULL, *r2 = NULL, *r3 = NULL, *tmp;\n    int bitsp, bitsq, ok = -1, n = 0;\n    BN_CTX *ctx = NULL;\n    if (bits < 16) {\n        ok = 0;\n        RSAerr(RSA_F_RSA_BUILTIN_KEYGEN, RSA_R_KEY_SIZE_TOO_SMALL);\n        goto err;\n    }\n    ctx = BN_CTX_new();\n    if (ctx == NULL)\n        goto err;\n    BN_CTX_start(ctx);\n    r0 = BN_CTX_get(ctx);\n    r1 = BN_CTX_get(ctx);\n    r2 = BN_CTX_get(ctx);\n    r3 = BN_CTX_get(ctx);\n    if (r3 == NULL)\n        goto err;\n    bitsp = (bits + 1) / 2;\n    bitsq = bits - bitsp;\n    if (!rsa->n && ((rsa->n = BN_new()) == NULL))\n        goto err;\n    if (!rsa->d && ((rsa->d = BN_secure_new()) == NULL))\n        goto err;\n    if (!rsa->e && ((rsa->e = BN_new()) == NULL))\n        goto err;\n    if (!rsa->p && ((rsa->p = BN_secure_new()) == NULL))\n        goto err;\n    if (!rsa->q && ((rsa->q = BN_secure_new()) == NULL))\n        goto err;\n    if (!rsa->dmp1 && ((rsa->dmp1 = BN_secure_new()) == NULL))\n        goto err;\n    if (!rsa->dmq1 && ((rsa->dmq1 = BN_secure_new()) == NULL))\n        goto err;\n    if (!rsa->iqmp && ((rsa->iqmp = BN_secure_new()) == NULL))\n        goto err;\n    if (BN_copy(rsa->e, e_value) == NULL)\n        goto err;\n    for (;;) {\n        if (!BN_generate_prime_ex(rsa->p, bitsp, 0, NULL, NULL, cb))\n            goto err;\n        if (!BN_sub(r2, rsa->p, BN_value_one()))\n            goto err;\n        if (!BN_gcd(r1, r2, rsa->e, ctx))\n            goto err;\n        if (BN_is_one(r1))\n            break;\n        if (!BN_GENCB_call(cb, 2, n++))\n            goto err;\n    }\n    if (!BN_GENCB_call(cb, 3, 0))\n        goto err;\n    for (;;) {\n        do {\n            if (!BN_generate_prime_ex(rsa->q, bitsq, 0, NULL, NULL, cb))\n                goto err;\n        } while (BN_cmp(rsa->p, rsa->q) == 0);\n        if (!BN_sub(r2, rsa->q, BN_value_one()))\n            goto err;\n        if (!BN_gcd(r1, r2, rsa->e, ctx))\n            goto err;\n        if (BN_is_one(r1))\n            break;\n        if (!BN_GENCB_call(cb, 2, n++))\n            goto err;\n    }\n    if (!BN_GENCB_call(cb, 3, 1))\n        goto err;\n    if (BN_cmp(rsa->p, rsa->q) < 0) {\n        tmp = rsa->p;\n        rsa->p = rsa->q;\n        rsa->q = tmp;\n    }\n    if (!BN_mul(rsa->n, rsa->p, rsa->q, ctx))\n        goto err;\n    if (!BN_sub(r1, rsa->p, BN_value_one()))\n        goto err;\n    if (!BN_sub(r2, rsa->q, BN_value_one()))\n        goto err;\n    if (!BN_mul(r0, r1, r2, ctx))\n        goto err;\n    {\n        BIGNUM *pr0 = BN_new();\n        if (pr0 == NULL)\n            goto err;\n        BN_with_flags(pr0, r0, BN_FLG_CONSTTIME);\n        if (!BN_mod_inverse(rsa->d, rsa->e, pr0, ctx)) {\n            BN_free(pr0);\n            goto err;\n        }\n        BN_free(pr0);\n    }\n    {\n        BIGNUM *d = BN_new();\n        if (d == NULL)\n            goto err;\n        BN_with_flags(d, rsa->d, BN_FLG_CONSTTIME);\n        if (\n               !BN_mod(rsa->dmp1, d, r1, ctx)\n            || !BN_mod(rsa->dmq1, d, r2, ctx)) {\n            BN_free(d);\n            goto err;\n        }\n        BN_free(d);\n    }\n    {\n        BIGNUM *p = BN_new();\n        if (p == NULL)\n            goto err;\n        BN_with_flags(p, rsa->p, BN_FLG_CONSTTIME);\n        if (!BN_mod_inverse(rsa->iqmp, rsa->q, p, ctx)) {\n            BN_free(p);\n            goto err;\n        }\n        BN_free(p);\n    }\n    ok = 1;\n err:\n    if (ok == -1) {\n        RSAerr(RSA_F_RSA_BUILTIN_KEYGEN, ERR_LIB_BN);\n        ok = 0;\n    }\n    if (ctx != NULL)\n        BN_CTX_end(ctx);\n    BN_CTX_free(ctx);\n    return ok;\n}', 'BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)\n{\n    bn_check_top(b);\n    if (a == b)\n        return a;\n    if (bn_wexpand(a, b->top) == NULL)\n        return NULL;\n    if (b->top > 0)\n        memcpy(a->d, b->d, sizeof(b->d[0]) * b->top);\n    if (BN_get_flags(b, BN_FLG_CONSTTIME) != 0)\n        BN_set_flags(a, BN_FLG_CONSTTIME);\n    a->top = b->top;\n    a->neg = b->neg;\n    bn_check_top(a);\n    return a;\n}', 'int BN_gcd(BIGNUM *r, const BIGNUM *in_a, const BIGNUM *in_b, BN_CTX *ctx)\n{\n    BIGNUM *a, *b, *t;\n    int ret = 0;\n    bn_check_top(in_a);\n    bn_check_top(in_b);\n    BN_CTX_start(ctx);\n    a = BN_CTX_get(ctx);\n    b = BN_CTX_get(ctx);\n    if (b == NULL)\n        goto err;\n    if (BN_copy(a, in_a) == NULL)\n        goto err;\n    if (BN_copy(b, in_b) == NULL)\n        goto err;\n    a->neg = 0;\n    b->neg = 0;\n    if (BN_cmp(a, b) < 0) {\n        t = a;\n        a = b;\n        b = t;\n    }\n    t = euclid(a, b);\n    if (t == NULL)\n        goto err;\n    if (BN_copy(r, t) == NULL)\n        goto err;\n    ret = 1;\n err:\n    BN_CTX_end(ctx);\n    bn_check_top(r);\n    return (ret);\n}', 'BIGNUM *bn_wexpand(BIGNUM *a, int words)\n{\n    return (words <= a->dmax) ? a : bn_expand2(a, words);\n}']