crypto/ec/ec2_smpl.c:700: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 536870848] by call to `BN_priv_rand`.
Showing all 17 steps of the trace


crypto/ec/ec2_smpl.c:689:1: Parameter `s->Z->d`
687.    * s:= p, r := 2p
688.    */
689. > static
690.   int ec_GF2m_simple_ladder_pre(const EC_GROUP *group,
691.                                 EC_POINT *r, EC_POINT *s,

crypto/ec/ec2_smpl.c:700:14: Call
698.       /* s blinding: make sure lambda (s->Z here) is not zero */
699.       do {
700.           if (!BN_priv_rand(s->Z, BN_num_bits(group->field) - 1,
                    ^
701.                             BN_RAND_TOP_ANY, BN_RAND_BOTTOM_ANY)) {
702.               ECerr(EC_F_EC_GF2M_SIMPLE_LADDER_PRE, ERR_R_BN_LIB);

crypto/bn/bn_rand.c:107:1: Parameter `*rnd->d`
  105.   }
  106.   
  107. > int BN_priv_rand(BIGNUM *rnd, int bits, int top, int bottom)
  108.   {
  109.       return bnrand(PRIVATE, rnd, bits, top, bottom);

crypto/bn/bn_rand.c:109:12: Call
  107.   int BN_priv_rand(BIGNUM *rnd, int bits, int top, int bottom)
  108.   {
  109.       return bnrand(PRIVATE, rnd, bits, top, bottom);
                    ^
  110.   }
  111.   

crypto/bn/bn_rand.c:21:1: Parameter `*rnd->d`
    19.   } BNRAND_FLAG;
    20.   
    21. > static int bnrand(BNRAND_FLAG flag, BIGNUM *rnd, int bits, int top, int bottom)
    22.   {
    23.       unsigned char *buf = NULL;

crypto/bn/bn_rand.c:84:10: Call
    82.       if (bottom)                 /* set bottom bit if requested */
    83.           buf[bytes - 1] |= 1;
    84.       if (!BN_bin2bn(buf, bytes, rnd))
                   ^
    85.           goto err;
    86.       ret = 1;

crypto/bn/bn_lib.c:372:1: Parameter `*ret->d`
      370.   }
      371.   
      372. > BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret)
      373.   {
      374.       unsigned int i, m;

crypto/bn/bn_lib.c:394:9: Call
      392.       i = ((n - 1) / BN_BYTES) + 1;
      393.       m = ((n - 1) % (BN_BYTES));
      394.       if (bn_wexpand(ret, (int)i) == NULL) {
                     ^
      395.           BN_free(bn);
      396.           return NULL;

crypto/bn/bn_lib.c:949:1: Parameter `*a->d`
        947.   }
        948.   
        949. > BIGNUM *bn_wexpand(BIGNUM *a, int words)
        950.   {
        951.       return (words <= a->dmax) ? a : bn_expand2(a, words);

crypto/bn/bn_lib.c:951:37: Call
        949.   BIGNUM *bn_wexpand(BIGNUM *a, int words)
        950.   {
        951.       return (words <= a->dmax) ? a : bn_expand2(a, words);
                                                   ^
        952.   }
        953.   

crypto/bn/bn_lib.c:245:1: Parameter `*b->d`
          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 `*b->d`
            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:232:9: Array access: Offset added: [8, +oo] Size: [0, 536870848] by call to `BN_priv_rand` 
            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\nint ec_GF2m_simple_ladder_pre(const EC_GROUP *group,\n                              EC_POINT *r, EC_POINT *s,\n                              EC_POINT *p, BN_CTX *ctx)\n{\n    if (p->Z_is_one == 0)\n        return 0;\n    do {\n        if (!BN_priv_rand(s->Z, BN_num_bits(group->field) - 1,\n                          BN_RAND_TOP_ANY, BN_RAND_BOTTOM_ANY)) {\n            ECerr(EC_F_EC_GF2M_SIMPLE_LADDER_PRE, ERR_R_BN_LIB);\n            return 0;\n        }\n    } while (BN_is_zero(s->Z));\n    if ((group->meth->field_encode != NULL\n         && !group->meth->field_encode(group, s->Z, s->Z, ctx))\n        || !group->meth->field_mul(group, s->X, p->X, s->Z, ctx))\n        return 0;\n    do {\n        if (!BN_priv_rand(r->Y, BN_num_bits(group->field) - 1,\n                          BN_RAND_TOP_ANY, BN_RAND_BOTTOM_ANY)) {\n            ECerr(EC_F_EC_GF2M_SIMPLE_LADDER_PRE, ERR_R_BN_LIB);\n            return 0;\n        }\n    } while (BN_is_zero(r->Y));\n    if ((group->meth->field_encode != NULL\n         && !group->meth->field_encode(group, r->Y, r->Y, ctx))\n        || !group->meth->field_sqr(group, r->Z, p->X, ctx)\n        || !group->meth->field_sqr(group, r->X, r->Z, ctx)\n        || !BN_GF2m_add(r->X, r->X, group->b)\n        || !group->meth->field_mul(group, r->Z, r->Z, r->Y, ctx)\n        || !group->meth->field_mul(group, r->X, r->X, r->Y, ctx))\n        return 0;\n    s->Z_is_one = 0;\n    r->Z_is_one = 0;\n    return 1;\n}', 'int BN_priv_rand(BIGNUM *rnd, int bits, int top, int bottom)\n{\n    return bnrand(PRIVATE, rnd, bits, top, bottom);\n}', 'static int bnrand(BNRAND_FLAG flag, BIGNUM *rnd, int bits, int top, int bottom)\n{\n    unsigned char *buf = NULL;\n    int b, ret = 0, bit, bytes, mask;\n    if (bits == 0) {\n        if (top != BN_RAND_TOP_ANY || bottom != BN_RAND_BOTTOM_ANY)\n            goto toosmall;\n        BN_zero(rnd);\n        return 1;\n    }\n    if (bits < 0 || (bits == 1 && top > 0))\n        goto toosmall;\n    bytes = (bits + 7) / 8;\n    bit = (bits - 1) % 8;\n    mask = 0xff << (bit + 1);\n    buf = OPENSSL_malloc(bytes);\n    if (buf == NULL) {\n        BNerr(BN_F_BNRAND, ERR_R_MALLOC_FAILURE);\n        goto err;\n    }\n    b = flag == NORMAL ? RAND_bytes(buf, bytes) : RAND_priv_bytes(buf, bytes);\n    if (b <= 0)\n        goto err;\n    if (flag == TESTING) {\n        int i;\n        unsigned char c;\n        for (i = 0; i < bytes; i++) {\n            if (RAND_bytes(&c, 1) <= 0)\n                goto err;\n            if (c >= 128 && i > 0)\n                buf[i] = buf[i - 1];\n            else if (c < 42)\n                buf[i] = 0;\n            else if (c < 84)\n                buf[i] = 255;\n        }\n    }\n    if (top >= 0) {\n        if (top) {\n            if (bit == 0) {\n                buf[0] = 1;\n                buf[1] |= 0x80;\n            } else {\n                buf[0] |= (3 << (bit - 1));\n            }\n        } else {\n            buf[0] |= (1 << bit);\n        }\n    }\n    buf[0] &= ~mask;\n    if (bottom)\n        buf[bytes - 1] |= 1;\n    if (!BN_bin2bn(buf, bytes, rnd))\n        goto err;\n    ret = 1;\n err:\n    OPENSSL_clear_free(buf, bytes);\n    bn_check_top(rnd);\n    return ret;\ntoosmall:\n    BNerr(BN_F_BNRAND, BN_R_BITS_TOO_SMALL);\n    return 0;\n}', 'BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret)\n{\n    unsigned int i, m;\n    unsigned int n;\n    BN_ULONG l;\n    BIGNUM *bn = NULL;\n    if (ret == NULL)\n        ret = bn = BN_new();\n    if (ret == NULL)\n        return NULL;\n    bn_check_top(ret);\n    for ( ; len > 0 && *s == 0; s++, len--)\n        continue;\n    n = len;\n    if (n == 0) {\n        ret->top = 0;\n        return ret;\n    }\n    i = ((n - 1) / BN_BYTES) + 1;\n    m = ((n - 1) % (BN_BYTES));\n    if (bn_wexpand(ret, (int)i) == NULL) {\n        BN_free(bn);\n        return NULL;\n    }\n    ret->top = i;\n    ret->neg = 0;\n    l = 0;\n    while (n--) {\n        l = (l << 8L) | *(s++);\n        if (m-- == 0) {\n            ret->d[--i] = l;\n            l = 0;\n            m = BN_BYTES - 1;\n        }\n    }\n    bn_correct_top(ret);\n    return ret;\n}', 'BIGNUM *bn_wexpand(BIGNUM *a, int words)\n{\n    return (words <= a->dmax) ? a : bn_expand2(a, words);\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}']