crypto/ec/ec2_mult.c:263: error: BUFFER_OVERRUN_L3
  Offset: [3, +oo] (⇐ [0, +oo] + 3) Size: [0, 8388607] by call to `BN_GF2m_mod_arr`.
Showing all 18 steps of the trace


crypto/ec/ec2_mult.c:248:10: Call
246.        */
247.       BN_CTX_start(ctx);
248.       x1 = BN_CTX_get(ctx);
                ^
249.       z1 = BN_CTX_get(ctx);
250.       if (z1 == NULL)

crypto/bn/bn_ctx.c:229:5: Call
  227.       }
  228.       /* OK, make sure the returned bignum is "zero" */
  229.       BN_zero(ret);
             ^
  230.       ctx->used++;
  231.       CTXDBG_RET(ctx, ret);

crypto/bn/bn_lib.c:463:1: Parameter `*a->d`
    461.   }
    462.   
    463. > int BN_set_word(BIGNUM *a, BN_ULONG w)
    464.   {
    465.       bn_check_top(a);

crypto/bn/bn_lib.c:466:9: Call
    464.   {
    465.       bn_check_top(a);
    466.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                   ^
    467.           return (0);
    468.       a->neg = 0;

crypto/bn/bn_lcl.h:676:1: Parameter `*a->d`
      674.   int bn_probable_prime_dh_coprime(BIGNUM *rnd, int bits, BN_CTX *ctx);
      675.   
      676. > static ossl_inline BIGNUM *bn_expand(BIGNUM *a, int bits)
      677.   {
      678.       if (bits > (INT_MAX - BN_BITS2 + 1))

crypto/ec/ec2_mult.c:263:10: Call
261.           goto err;
262.   
263.       if (!BN_GF2m_mod_arr(x1, point->X, group->poly))
                ^
264.           goto err;               /* x1 = x */
265.       if (!BN_one(z1))

crypto/bn/bn_gf2m.c:300:1: Parameter `*r->d`
  298.   
  299.   /* Performs modular reduction of a and store result in r.  r could be a. */
  300. > int BN_GF2m_mod_arr(BIGNUM *r, const BIGNUM *a, const int p[])
  301.   {
  302.       int j, k;

crypto/bn/bn_gf2m.c:310:9: Call
  308.       if (!p[0]) {
  309.           /* reduction mod 1 => return 0 */
  310.           BN_zero(r);
                 ^
  311.           return 1;
  312.       }

crypto/bn/bn_lib.c:463:1: Parameter `*a->d`
    461.   }
    462.   
    463. > int BN_set_word(BIGNUM *a, BN_ULONG w)
    464.   {
    465.       bn_check_top(a);

crypto/bn/bn_lib.c:466:9: Call
    464.   {
    465.       bn_check_top(a);
    466.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                   ^
    467.           return (0);
    468.       a->neg = 0;

crypto/bn/bn_lcl.h:676:1: Parameter `*a->d`
      674.   int bn_probable_prime_dh_coprime(BIGNUM *rnd, int bits, BN_CTX *ctx);
      675.   
      676. > static ossl_inline BIGNUM *bn_expand(BIGNUM *a, int bits)
      677.   {
      678.       if (bits > (INT_MAX - BN_BITS2 + 1))

crypto/bn/bn_lcl.h:684:12: Call
      682.           return a;
      683.   
      684.       return bn_expand2((a),(bits+BN_BITS2-1)/BN_BITS2);
                        ^
      685.   }
      686.   

crypto/bn/bn_lib.c:323:1: Parameter `*b->d`
        321.    */
        322.   
        323. > BIGNUM *bn_expand2(BIGNUM *b, int words)
        324.   {
        325.       bn_check_top(b);

crypto/bn/bn_lib.c:328:23: Call
        326.   
        327.       if (words > b->dmax) {
        328.           BN_ULONG *a = bn_expand_internal(b, words);
                                     ^
        329.           if (!a)
        330.               return NULL;

crypto/bn/bn_lib.c:246:1: <Length trace>
244.   /* This is used by bn_expand2() */
245.   /* The caller MUST check that words > b->dmax before calling this */
246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
247.   {
248.       BN_ULONG *A, *a = NULL;

crypto/bn/bn_lib.c:246:1: Parameter `*b->d`
          244.   /* This is used by bn_expand2() */
          245.   /* The caller MUST check that words > b->dmax before calling this */
          246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
          247.   {
          248.       BN_ULONG *A, *a = NULL;

crypto/bn/bn_lib.c:272:5: Assignment
          270.   
          271.   #if 1
          272.       B = b->d;
                     ^
          273.       /* Check if the previous number needs to be copied */
          274.       if (B != NULL) {

crypto/bn/bn_lib.c:289:18: Array access: Offset: [3, +oo] (⇐ [0, +oo] + 3) Size: [0, 8388607] by call to `BN_GF2m_mod_arr` 
          287.               a1 = B[1];
          288.               a2 = B[2];
          289.               a3 = B[3];
                                  ^
          290.               A[0] = a0;
          291.               A[1] = a1;

static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
{
    BN_ULONG *A, *a = NULL;
    const BN_ULONG *B;
    int i;
    bn_check_top(b);
    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 = A = OPENSSL_secure_zalloc(words * sizeof(*a));
    else
        a = A = OPENSSL_zalloc(words * sizeof(*a));
    if (A == NULL) {
        BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);
        return (NULL);
    }
#if 1
    B = b->d;
    if (B != NULL) {
        for (i = b->top >> 2; i > 0; i--, A += 4, B += 4) {
            BN_ULONG a0, a1, a2, a3;
            a0 = B[0];
            a1 = B[1];
            a2 = B[2];
            a3 = B[3];
            A[0] = a0;
            A[1] = a1;
            A[2] = a2;
            A[3] = a3;
        }
        switch (b->top & 3) {
        case 3:
            A[2] = B[2];
        case 2:
            A[1] = B[1];
        case 1:
            A[0] = B[0];
        case 0:
            ;
        }
    }
#else
    memset(A, 0, sizeof(*A) * words);
    memcpy(A, b->d, sizeof(b->d[0]) * b->top);
#endif
    return (a);
}
['static int ec_GF2m_montgomery_point_multiply(const EC_GROUP *group,\n                                             EC_POINT *r,\n                                             const BIGNUM *scalar,\n                                             const EC_POINT *point,\n                                             BN_CTX *ctx)\n{\n    BIGNUM *x1, *x2, *z1, *z2;\n    int ret = 0, i, group_top;\n    BN_ULONG mask, word;\n    if (r == point) {\n        ECerr(EC_F_EC_GF2M_MONTGOMERY_POINT_MULTIPLY, EC_R_INVALID_ARGUMENT);\n        return 0;\n    }\n    if ((scalar == NULL) || BN_is_zero(scalar) || (point == NULL) ||\n        EC_POINT_is_at_infinity(group, point)) {\n        return EC_POINT_set_to_infinity(group, r);\n    }\n    if (!point->Z_is_one)\n        return 0;\n    BN_CTX_start(ctx);\n    x1 = BN_CTX_get(ctx);\n    z1 = BN_CTX_get(ctx);\n    if (z1 == NULL)\n        goto err;\n    x2 = r->X;\n    z2 = r->Y;\n    group_top = bn_get_top(group->field);\n    if (bn_wexpand(x1, group_top) == NULL\n        || bn_wexpand(z1, group_top) == NULL\n        || bn_wexpand(x2, group_top) == NULL\n        || bn_wexpand(z2, group_top) == NULL)\n        goto err;\n    if (!BN_GF2m_mod_arr(x1, point->X, group->poly))\n        goto err;\n    if (!BN_one(z1))\n        goto err;\n    if (!group->meth->field_sqr(group, z2, x1, ctx))\n        goto err;\n    if (!group->meth->field_sqr(group, x2, z2, ctx))\n        goto err;\n    if (!BN_GF2m_add(x2, x2, group->b))\n        goto err;\n    i = bn_get_top(scalar) - 1;\n    mask = BN_TBIT;\n    word = bn_get_words(scalar)[i];\n    while (!(word & mask))\n        mask >>= 1;\n    mask >>= 1;\n    if (!mask) {\n        i--;\n        mask = BN_TBIT;\n    }\n    for (; i >= 0; i--) {\n        word = bn_get_words(scalar)[i];\n        while (mask) {\n            BN_consttime_swap(word & mask, x1, x2, group_top);\n            BN_consttime_swap(word & mask, z1, z2, group_top);\n            if (!gf2m_Madd(group, point->X, x2, z2, x1, z1, ctx))\n                goto err;\n            if (!gf2m_Mdouble(group, x1, z1, ctx))\n                goto err;\n            BN_consttime_swap(word & mask, x1, x2, group_top);\n            BN_consttime_swap(word & mask, z1, z2, group_top);\n            mask >>= 1;\n        }\n        mask = BN_TBIT;\n    }\n    i = gf2m_Mxy(group, point->X, point->Y, x1, z1, x2, z2, ctx);\n    if (i == 0)\n        goto err;\n    else if (i == 1) {\n        if (!EC_POINT_set_to_infinity(group, r))\n            goto err;\n    } else {\n        if (!BN_one(r->Z))\n            goto err;\n        r->Z_is_one = 1;\n    }\n    BN_set_negative(r->X, 0);\n    BN_set_negative(r->Y, 0);\n    ret = 1;\n err:\n    BN_CTX_end(ctx);\n    return ret;\n}', 'BIGNUM *BN_CTX_get(BN_CTX *ctx)\n{\n    BIGNUM *ret;\n    CTXDBG_ENTRY("BN_CTX_get", ctx);\n    if (ctx->err_stack || ctx->too_many)\n        return NULL;\n    if ((ret = BN_POOL_get(&ctx->pool, ctx->flags)) == NULL) {\n        ctx->too_many = 1;\n        BNerr(BN_F_BN_CTX_GET, BN_R_TOO_MANY_TEMPORARY_VARIABLES);\n        return NULL;\n    }\n    BN_zero(ret);\n    ctx->used++;\n    CTXDBG_RET(ctx, ret);\n    return ret;\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    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}', 'int BN_GF2m_mod_arr(BIGNUM *r, const BIGNUM *a, const int p[])\n{\n    int j, k;\n    int n, dN, d0, d1;\n    BN_ULONG zz, *z;\n    bn_check_top(a);\n    if (!p[0]) {\n        BN_zero(r);\n        return 1;\n    }\n    if (a != r) {\n        if (!bn_wexpand(r, a->top))\n            return 0;\n        for (j = 0; j < a->top; j++) {\n            r->d[j] = a->d[j];\n        }\n        r->top = a->top;\n    }\n    z = r->d;\n    dN = p[0] / BN_BITS2;\n    for (j = r->top - 1; j > dN;) {\n        zz = z[j];\n        if (z[j] == 0) {\n            j--;\n            continue;\n        }\n        z[j] = 0;\n        for (k = 1; p[k] != 0; k++) {\n            n = p[0] - p[k];\n            d0 = n % BN_BITS2;\n            d1 = BN_BITS2 - d0;\n            n /= BN_BITS2;\n            z[j - n] ^= (zz >> d0);\n            if (d0)\n                z[j - n - 1] ^= (zz << d1);\n        }\n        n = dN;\n        d0 = p[0] % BN_BITS2;\n        d1 = BN_BITS2 - d0;\n        z[j - n] ^= (zz >> d0);\n        if (d0)\n            z[j - n - 1] ^= (zz << d1);\n    }\n    while (j == dN) {\n        d0 = p[0] % BN_BITS2;\n        zz = z[dN] >> d0;\n        if (zz == 0)\n            break;\n        d1 = BN_BITS2 - d0;\n        if (d0)\n            z[dN] = (z[dN] << d1) >> d1;\n        else\n            z[dN] = 0;\n        z[0] ^= zz;\n        for (k = 1; p[k] != 0; k++) {\n            BN_ULONG tmp_ulong;\n            n = p[k] / BN_BITS2;\n            d0 = p[k] % BN_BITS2;\n            d1 = BN_BITS2 - d0;\n            z[n] ^= (zz << d0);\n            if (d0 && (tmp_ulong = zz >> d1))\n                z[n + 1] ^= tmp_ulong;\n        }\n    }\n    bn_correct_top(r);\n    return 1;\n}', 'BIGNUM *bn_expand2(BIGNUM *b, int words)\n{\n    bn_check_top(b);\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    bn_check_top(b);\n    return b;\n}', 'static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)\n{\n    BN_ULONG *A, *a = NULL;\n    const BN_ULONG *B;\n    int i;\n    bn_check_top(b);\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 = A = OPENSSL_secure_zalloc(words * sizeof(*a));\n    else\n        a = 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#if 1\n    B = b->d;\n    if (B != NULL) {\n        for (i = b->top >> 2; i > 0; i--, A += 4, B += 4) {\n            BN_ULONG a0, a1, a2, a3;\n            a0 = B[0];\n            a1 = B[1];\n            a2 = B[2];\n            a3 = B[3];\n            A[0] = a0;\n            A[1] = a1;\n            A[2] = a2;\n            A[3] = a3;\n        }\n        switch (b->top & 3) {\n        case 3:\n            A[2] = B[2];\n        case 2:\n            A[1] = B[1];\n        case 1:\n            A[0] = B[0];\n        case 0:\n            ;\n        }\n    }\n#else\n    memset(A, 0, sizeof(*A) * words);\n    memcpy(A, b->d, sizeof(b->d[0]) * b->top);\n#endif\n    return (a);\n}']