crypto/rsa/rsa_ossl.c:855: error: BUFFER_OVERRUN_L3
  Offset: [4, +oo] (⇐ [0, +oo] + 4) Size: [0, 8388607] by call to `BN_mul`.
Showing all 12 steps of the trace


crypto/rsa/rsa_ossl.c:845:10: Call
843.       }
844.   
845.       if (!BN_sub(r0, r0, m1))
                ^
846.           goto err;
847.       /*

crypto/bn/bn_add.c:234:1: Parameter `*r->d`
  232.   }
  233.   
  234. > int BN_sub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)
  235.   {
  236.       int max;

crypto/bn/bn_add.c:275:9: Call
  273.   
  274.       max = (a->top > b->top) ? a->top : b->top;
  275.       if (bn_wexpand(r, max) == NULL)
                 ^
  276.           return (0);
  277.       if (BN_ucmp(a, b) < 0) {

crypto/bn/bn_lib.c:995:1: Parameter `*a->d`
    993.   }
    994.   
    995. > BIGNUM *bn_wexpand(BIGNUM *a, int words)
    996.   {
    997.       return (words <= a->dmax) ? a : bn_expand2(a, words);

crypto/rsa/rsa_ossl.c:855:10: Call
853.               goto err;
854.   
855.       if (!BN_mul(r1, r0, rsa->iqmp, ctx))
                ^
856.           goto err;
857.   

crypto/bn/bn_mul.c:883:1: Parameter `*a->d`
  881.   #endif                          /* BN_RECURSION */
  882.   
  883. > int BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
  884.   {
  885.       int ret = 0;

crypto/bn/bn_mul.c:964:17: Call
  962.                   if (bn_wexpand(rr, k * 4) == NULL)
  963.                       goto err;
  964.                   bn_mul_part_recursive(rr->d, a->d, b->d,
                         ^
  965.                                         j, al - j, bl - j, t->d);
  966.               } else {            /* al <= j || bl <= j */

crypto/bn/bn_mul.c:534:1: Parameter `*a`
    532.    */
    533.   /* tnX may not be negative but less than n */
    534. > void bn_mul_part_recursive(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n,
    535.                              int tna, int tnb, BN_ULONG *t)
    536.   {

crypto/bn/bn_mul.c:542:9: Call
    540.   
    541.       if (n < 8) {
    542.           bn_mul_normal(r, a, n + tna, b, n + tnb);
                   ^
    543.           return;
    544.       }

crypto/bn/bn_mul.c:1037:1: <Length trace>
1035.   }
1036.   
1037. > void bn_mul_normal(BN_ULONG *r, BN_ULONG *a, int na, BN_ULONG *b, int nb)
1038.   {
1039.       BN_ULONG *rr;

crypto/bn/bn_mul.c:1037:1: Parameter `*b`
      1035.   }
      1036.   
      1037. > void bn_mul_normal(BN_ULONG *r, BN_ULONG *a, int na, BN_ULONG *b, int nb)
      1038.   {
      1039.       BN_ULONG *rr;

crypto/bn/bn_mul.c:1072:50: Array access: Offset: [4, +oo] (⇐ [0, +oo] + 4) Size: [0, 8388607] by call to `BN_mul` 
      1070.           if (--nb <= 0)
      1071.               return;
      1072.           rr[4] = bn_mul_add_words(&(r[4]), a, na, b[4]);
                                                               ^
      1073.           rr += 4;
      1074.           r += 4;

void bn_mul_normal(BN_ULONG *r, BN_ULONG *a, int na, BN_ULONG *b, int nb)
{
    BN_ULONG *rr;
    if (na < nb) {
        int itmp;
        BN_ULONG *ltmp;
        itmp = na;
        na = nb;
        nb = itmp;
        ltmp = a;
        a = b;
        b = ltmp;
    }
    rr = &(r[na]);
    if (nb <= 0) {
        (void)bn_mul_words(r, a, na, 0);
        return;
    } else
        rr[0] = bn_mul_words(r, a, na, b[0]);
    for (;;) {
        if (--nb <= 0)
            return;
        rr[1] = bn_mul_add_words(&(r[1]), a, na, b[1]);
        if (--nb <= 0)
            return;
        rr[2] = bn_mul_add_words(&(r[2]), a, na, b[2]);
        if (--nb <= 0)
            return;
        rr[3] = bn_mul_add_words(&(r[3]), a, na, b[3]);
        if (--nb <= 0)
            return;
        rr[4] = bn_mul_add_words(&(r[4]), a, na, b[4]);
        rr += 4;
        r += 4;
        b += 4;
    }
}
['static int rsa_ossl_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)\n{\n    BIGNUM *r1, *m1, *vrfy;\n    int ret = 0;\n    BN_CTX_start(ctx);\n    r1 = BN_CTX_get(ctx);\n    m1 = BN_CTX_get(ctx);\n    vrfy = BN_CTX_get(ctx);\n    {\n        BIGNUM *local_p = NULL, *local_q = NULL;\n        BIGNUM *p = NULL, *q = NULL;\n        if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) {\n            local_p = p = BN_new();\n            if (p == NULL)\n                goto err;\n            BN_with_flags(p, rsa->p, BN_FLG_CONSTTIME);\n            local_q = q = BN_new();\n            if (q == NULL) {\n                BN_free(local_p);\n                goto err;\n            }\n            BN_with_flags(q, rsa->q, BN_FLG_CONSTTIME);\n        } else {\n            p = rsa->p;\n            q = rsa->q;\n        }\n        if (rsa->flags & RSA_FLAG_CACHE_PRIVATE) {\n            if (!BN_MONT_CTX_set_locked\n                (&rsa->_method_mod_p, CRYPTO_LOCK_RSA, p, ctx)\n                || !BN_MONT_CTX_set_locked(&rsa->_method_mod_q,\n                                           CRYPTO_LOCK_RSA, q, ctx)) {\n                BN_free(local_p);\n                BN_free(local_q);\n                goto err;\n            }\n        }\n        BN_free(local_p);\n        BN_free(local_q);\n    }\n    if (rsa->flags & RSA_FLAG_CACHE_PUBLIC)\n        if (!BN_MONT_CTX_set_locked\n            (&rsa->_method_mod_n, CRYPTO_LOCK_RSA, rsa->n, ctx))\n            goto err;\n    {\n        BIGNUM *local_c = NULL;\n        const BIGNUM *c;\n        if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) {\n            local_c = BN_new();\n            if (local_c == NULL)\n                goto err;\n            BN_with_flags(local_c, I, BN_FLG_CONSTTIME);\n            c = local_c;\n        } else {\n            c = I;\n        }\n        if (!BN_mod(r1, c, rsa->q, ctx)) {\n            BN_free(local_c);\n            goto err;\n        }\n        {\n            BIGNUM *local_dmq1 = NULL, *dmq1;\n            if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) {\n                dmq1 = local_dmq1 = BN_new();\n                if (local_dmq1 == NULL) {\n                    BN_free(local_c);\n                    goto err;\n                }\n                BN_with_flags(dmq1, rsa->dmq1, BN_FLG_CONSTTIME);\n            } else {\n                dmq1 = rsa->dmq1;\n            }\n            if (!rsa->meth->bn_mod_exp(m1, r1, dmq1, rsa->q, ctx,\n                rsa->_method_mod_q)) {\n                BN_free(local_c);\n                BN_free(local_dmq1);\n                goto err;\n            }\n            BN_free(local_dmq1);\n        }\n        if (!BN_mod(r1, c, rsa->p, ctx)) {\n            BN_free(local_c);\n            goto err;\n        }\n        BN_free(local_c);\n    }\n    {\n        BIGNUM *local_dmp1 = NULL, *dmp1;\n        if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) {\n            dmp1 = local_dmp1 = BN_new();\n            if (local_dmp1 == NULL)\n                goto err;\n            BN_with_flags(dmp1, rsa->dmp1, BN_FLG_CONSTTIME);\n        } else {\n            dmp1 = rsa->dmp1;\n        }\n        if (!rsa->meth->bn_mod_exp(r0, r1, dmp1, rsa->p, ctx,\n                                   rsa->_method_mod_p)) {\n            BN_free(local_dmp1);\n            goto err;\n        }\n        BN_free(local_dmp1);\n    }\n    if (!BN_sub(r0, r0, m1))\n        goto err;\n    if (BN_is_negative(r0))\n        if (!BN_add(r0, r0, rsa->p))\n            goto err;\n    if (!BN_mul(r1, r0, rsa->iqmp, ctx))\n        goto err;\n    {\n        BIGNUM *local_r1 = NULL, *pr1;\n        if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) {\n            pr1 = local_r1 = BN_new();\n            if (local_r1 == NULL)\n                goto err;\n            BN_with_flags(pr1, r1, BN_FLG_CONSTTIME);\n        } else {\n            pr1 = r1;\n        }\n        if (!BN_mod(r0, pr1, rsa->p, ctx)) {\n            BN_free(local_r1);\n            goto err;\n        }\n        BN_free(local_r1);\n    }\n    if (BN_is_negative(r0))\n        if (!BN_add(r0, r0, rsa->p))\n            goto err;\n    if (!BN_mul(r1, r0, rsa->q, ctx))\n        goto err;\n    if (!BN_add(r0, r1, m1))\n        goto err;\n    if (rsa->e && rsa->n) {\n        if (!rsa->meth->bn_mod_exp(vrfy, r0, rsa->e, rsa->n, ctx,\n                                   rsa->_method_mod_n))\n            goto err;\n        if (!BN_sub(vrfy, vrfy, I))\n            goto err;\n        if (!BN_mod(vrfy, vrfy, rsa->n, ctx))\n            goto err;\n        if (BN_is_negative(vrfy))\n            if (!BN_add(vrfy, vrfy, rsa->n))\n                goto err;\n        if (!BN_is_zero(vrfy)) {\n            BIGNUM *local_d = NULL;\n            BIGNUM *d = NULL;\n            if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) {\n                local_d = d = BN_new();\n                if (d == NULL)\n                    goto err;\n                BN_with_flags(d, rsa->d, BN_FLG_CONSTTIME);\n            } else {\n                d = rsa->d;\n            }\n            if (!rsa->meth->bn_mod_exp(r0, I, d, rsa->n, ctx,\n                                       rsa->_method_mod_n)) {\n                BN_free(local_d);\n                goto err;\n            }\n            BN_free(local_d);\n        }\n    }\n    ret = 1;\n err:\n    BN_CTX_end(ctx);\n    return (ret);\n}', 'int BN_sub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)\n{\n    int max;\n    int add = 0, neg = 0;\n    const BIGNUM *tmp;\n    bn_check_top(a);\n    bn_check_top(b);\n    if (a->neg) {\n        if (b->neg) {\n            tmp = a;\n            a = b;\n            b = tmp;\n        } else {\n            add = 1;\n            neg = 1;\n        }\n    } else {\n        if (b->neg) {\n            add = 1;\n            neg = 0;\n        }\n    }\n    if (add) {\n        if (!BN_uadd(r, a, b))\n            return (0);\n        r->neg = neg;\n        return (1);\n    }\n    max = (a->top > b->top) ? a->top : b->top;\n    if (bn_wexpand(r, max) == NULL)\n        return (0);\n    if (BN_ucmp(a, b) < 0) {\n        if (!BN_usub(r, b, a))\n            return (0);\n        r->neg = 1;\n    } else {\n        if (!BN_usub(r, a, b))\n            return (0);\n        r->neg = 0;\n    }\n    bn_check_top(r);\n    return (1);\n}', 'BIGNUM *bn_wexpand(BIGNUM *a, int words)\n{\n    return (words <= a->dmax) ? a : bn_expand2(a, words);\n}', 'int BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)\n{\n    int ret = 0;\n    int top, al, bl;\n    BIGNUM *rr;\n#if defined(BN_MUL_COMBA) || defined(BN_RECURSION)\n    int i;\n#endif\n#ifdef BN_RECURSION\n    BIGNUM *t = NULL;\n    int j = 0, k;\n#endif\n    bn_check_top(a);\n    bn_check_top(b);\n    bn_check_top(r);\n    al = a->top;\n    bl = b->top;\n    if ((al == 0) || (bl == 0)) {\n        BN_zero(r);\n        return (1);\n    }\n    top = al + bl;\n    BN_CTX_start(ctx);\n    if ((r == a) || (r == b)) {\n        if ((rr = BN_CTX_get(ctx)) == NULL)\n            goto err;\n    } else\n        rr = r;\n    rr->neg = a->neg ^ b->neg;\n#if defined(BN_MUL_COMBA) || defined(BN_RECURSION)\n    i = al - bl;\n#endif\n#ifdef BN_MUL_COMBA\n    if (i == 0) {\n# if 0\n        if (al == 4) {\n            if (bn_wexpand(rr, 8) == NULL)\n                goto err;\n            rr->top = 8;\n            bn_mul_comba4(rr->d, a->d, b->d);\n            goto end;\n        }\n# endif\n        if (al == 8) {\n            if (bn_wexpand(rr, 16) == NULL)\n                goto err;\n            rr->top = 16;\n            bn_mul_comba8(rr->d, a->d, b->d);\n            goto end;\n        }\n    }\n#endif\n#ifdef BN_RECURSION\n    if ((al >= BN_MULL_SIZE_NORMAL) && (bl >= BN_MULL_SIZE_NORMAL)) {\n        if (i >= -1 && i <= 1) {\n            if (i >= 0) {\n                j = BN_num_bits_word((BN_ULONG)al);\n            }\n            if (i == -1) {\n                j = BN_num_bits_word((BN_ULONG)bl);\n            }\n            j = 1 << (j - 1);\n            assert(j <= al || j <= bl);\n            k = j + j;\n            t = BN_CTX_get(ctx);\n            if (t == NULL)\n                goto err;\n            if (al > j || bl > j) {\n                if (bn_wexpand(t, k * 4) == NULL)\n                    goto err;\n                if (bn_wexpand(rr, k * 4) == NULL)\n                    goto err;\n                bn_mul_part_recursive(rr->d, a->d, b->d,\n                                      j, al - j, bl - j, t->d);\n            } else {\n                if (bn_wexpand(t, k * 2) == NULL)\n                    goto err;\n                if (bn_wexpand(rr, k * 2) == NULL)\n                    goto err;\n                bn_mul_recursive(rr->d, a->d, b->d, j, al - j, bl - j, t->d);\n            }\n            rr->top = top;\n            goto end;\n        }\n# if 0\n        if (i == 1 && !BN_get_flags(b, BN_FLG_STATIC_DATA)) {\n            BIGNUM *tmp_bn = (BIGNUM *)b;\n            if (bn_wexpand(tmp_bn, al) == NULL)\n                goto err;\n            tmp_bn->d[bl] = 0;\n            bl++;\n            i--;\n        } else if (i == -1 && !BN_get_flags(a, BN_FLG_STATIC_DATA)) {\n            BIGNUM *tmp_bn = (BIGNUM *)a;\n            if (bn_wexpand(tmp_bn, bl) == NULL)\n                goto err;\n            tmp_bn->d[al] = 0;\n            al++;\n            i++;\n        }\n        if (i == 0) {\n            j = BN_num_bits_word((BN_ULONG)al);\n            j = 1 << (j - 1);\n            k = j + j;\n            t = BN_CTX_get(ctx);\n            if (al == j) {\n                if (bn_wexpand(t, k * 2) == NULL)\n                    goto err;\n                if (bn_wexpand(rr, k * 2) == NULL)\n                    goto err;\n                bn_mul_recursive(rr->d, a->d, b->d, al, t->d);\n            } else {\n                if (bn_wexpand(t, k * 4) == NULL)\n                    goto err;\n                if (bn_wexpand(rr, k * 4) == NULL)\n                    goto err;\n                bn_mul_part_recursive(rr->d, a->d, b->d, al - j, j, t->d);\n            }\n            rr->top = top;\n            goto end;\n        }\n# endif\n    }\n#endif\n    if (bn_wexpand(rr, top) == NULL)\n        goto err;\n    rr->top = top;\n    bn_mul_normal(rr->d, a->d, al, b->d, bl);\n#if defined(BN_MUL_COMBA) || defined(BN_RECURSION)\n end:\n#endif\n    bn_correct_top(rr);\n    if (r != rr)\n        BN_copy(r, rr);\n    ret = 1;\n err:\n    bn_check_top(r);\n    BN_CTX_end(ctx);\n    return (ret);\n}', 'void bn_mul_part_recursive(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n,\n                           int tna, int tnb, BN_ULONG *t)\n{\n    int i, j, n2 = n * 2;\n    int c1, c2, neg;\n    BN_ULONG ln, lo, *p;\n    if (n < 8) {\n        bn_mul_normal(r, a, n + tna, b, n + tnb);\n        return;\n    }\n    c1 = bn_cmp_part_words(a, &(a[n]), tna, n - tna);\n    c2 = bn_cmp_part_words(&(b[n]), b, tnb, tnb - n);\n    neg = 0;\n    switch (c1 * 3 + c2) {\n    case -4:\n        bn_sub_part_words(t, &(a[n]), a, tna, tna - n);\n        bn_sub_part_words(&(t[n]), b, &(b[n]), tnb, n - tnb);\n        break;\n    case -3:\n    case -2:\n        bn_sub_part_words(t, &(a[n]), a, tna, tna - n);\n        bn_sub_part_words(&(t[n]), &(b[n]), b, tnb, tnb - n);\n        neg = 1;\n        break;\n    case -1:\n    case 0:\n    case 1:\n    case 2:\n        bn_sub_part_words(t, a, &(a[n]), tna, n - tna);\n        bn_sub_part_words(&(t[n]), b, &(b[n]), tnb, n - tnb);\n        neg = 1;\n        break;\n    case 3:\n    case 4:\n        bn_sub_part_words(t, a, &(a[n]), tna, n - tna);\n        bn_sub_part_words(&(t[n]), &(b[n]), b, tnb, tnb - n);\n        break;\n    }\n# if 0\n    if (n == 4) {\n        bn_mul_comba4(&(t[n2]), t, &(t[n]));\n        bn_mul_comba4(r, a, b);\n        bn_mul_normal(&(r[n2]), &(a[n]), tn, &(b[n]), tn);\n        memset(&r[n2 + tn * 2], 0, sizeof(*r) * (n2 - tn * 2));\n    } else\n# endif\n    if (n == 8) {\n        bn_mul_comba8(&(t[n2]), t, &(t[n]));\n        bn_mul_comba8(r, a, b);\n        bn_mul_normal(&(r[n2]), &(a[n]), tna, &(b[n]), tnb);\n        memset(&r[n2 + tna + tnb], 0, sizeof(*r) * (n2 - tna - tnb));\n    } else {\n        p = &(t[n2 * 2]);\n        bn_mul_recursive(&(t[n2]), t, &(t[n]), n, 0, 0, p);\n        bn_mul_recursive(r, a, b, n, 0, 0, p);\n        i = n / 2;\n        if (tna > tnb)\n            j = tna - i;\n        else\n            j = tnb - i;\n        if (j == 0) {\n            bn_mul_recursive(&(r[n2]), &(a[n]), &(b[n]),\n                             i, tna - i, tnb - i, p);\n            memset(&r[n2 + i * 2], 0, sizeof(*r) * (n2 - i * 2));\n        } else if (j > 0) {\n            bn_mul_part_recursive(&(r[n2]), &(a[n]), &(b[n]),\n                                  i, tna - i, tnb - i, p);\n            memset(&(r[n2 + tna + tnb]), 0,\n                   sizeof(BN_ULONG) * (n2 - tna - tnb));\n        } else {\n            memset(&r[n2], 0, sizeof(*r) * n2);\n            if (tna < BN_MUL_RECURSIVE_SIZE_NORMAL\n                && tnb < BN_MUL_RECURSIVE_SIZE_NORMAL) {\n                bn_mul_normal(&(r[n2]), &(a[n]), tna, &(b[n]), tnb);\n            } else {\n                for (;;) {\n                    i /= 2;\n                    if (i < tna || i < tnb) {\n                        bn_mul_part_recursive(&(r[n2]),\n                                              &(a[n]), &(b[n]),\n                                              i, tna - i, tnb - i, p);\n                        break;\n                    } else if (i == tna || i == tnb) {\n                        bn_mul_recursive(&(r[n2]),\n                                         &(a[n]), &(b[n]),\n                                         i, tna - i, tnb - i, p);\n                        break;\n                    }\n                }\n            }\n        }\n    }\n    c1 = (int)(bn_add_words(t, r, &(r[n2]), n2));\n    if (neg) {\n        c1 -= (int)(bn_sub_words(&(t[n2]), t, &(t[n2]), n2));\n    } else {\n        c1 += (int)(bn_add_words(&(t[n2]), &(t[n2]), t, n2));\n    }\n    c1 += (int)(bn_add_words(&(r[n]), &(r[n]), &(t[n2]), n2));\n    if (c1) {\n        p = &(r[n + n2]);\n        lo = *p;\n        ln = (lo + c1) & BN_MASK2;\n        *p = ln;\n        if (ln < (BN_ULONG)c1) {\n            do {\n                p++;\n                lo = *p;\n                ln = (lo + 1) & BN_MASK2;\n                *p = ln;\n            } while (ln == 0);\n        }\n    }\n}', 'void bn_mul_normal(BN_ULONG *r, BN_ULONG *a, int na, BN_ULONG *b, int nb)\n{\n    BN_ULONG *rr;\n    if (na < nb) {\n        int itmp;\n        BN_ULONG *ltmp;\n        itmp = na;\n        na = nb;\n        nb = itmp;\n        ltmp = a;\n        a = b;\n        b = ltmp;\n    }\n    rr = &(r[na]);\n    if (nb <= 0) {\n        (void)bn_mul_words(r, a, na, 0);\n        return;\n    } else\n        rr[0] = bn_mul_words(r, a, na, b[0]);\n    for (;;) {\n        if (--nb <= 0)\n            return;\n        rr[1] = bn_mul_add_words(&(r[1]), a, na, b[1]);\n        if (--nb <= 0)\n            return;\n        rr[2] = bn_mul_add_words(&(r[2]), a, na, b[2]);\n        if (--nb <= 0)\n            return;\n        rr[3] = bn_mul_add_words(&(r[3]), a, na, b[3]);\n        if (--nb <= 0)\n            return;\n        rr[4] = bn_mul_add_words(&(r[4]), a, na, b[4]);\n        rr += 4;\n        r += 4;\n        b += 4;\n    }\n}']