crypto/ec/ec2_oct.c:308: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 536870848] by call to `BN_bin2bn`.
Showing all 17 steps of the trace


crypto/ec/ec2_oct.c:291:9: Call
289.   
290.       BN_CTX_start(ctx);
291.       x = BN_CTX_get(ctx);
               ^
292.       y = BN_CTX_get(ctx);
293.       yxi = BN_CTX_get(ctx);

crypto/bn/bn_ctx.c:221:5: Call
  219.       }
  220.       /* OK, make sure the returned bignum is "zero" */
  221.       BN_zero(ret);
             ^
  222.       /* clear BN_FLG_CONSTTIME if leaked from previous frames */
  223.       ret->flags &= (~BN_FLG_CONSTTIME);

crypto/bn/bn_lib.c:361:1: Parameter `*a->d`
    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->d`
      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/ec/ec2_oct.c:308:14: Call
306.               goto err;
307.       } else {
308.           if (!BN_bin2bn(buf + 1 + field_len, field_len, y))
                    ^
309.               goto err;
310.           if (BN_num_bits(y) > m) {

crypto/bn/bn_lib.c:374:1: Parameter `*ret->d`
  372.   }
  373.   
  374. > BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret)
  375.   {
  376.       unsigned int i, m;

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

crypto/bn/bn_lib.c:962:1: Parameter `*a->d`
    960.   }
    961.   
    962. > BIGNUM *bn_wexpand(BIGNUM *a, int words)
    963.   {
    964.       return (words <= a->dmax) ? a : bn_expand2(a, words);

crypto/bn/bn_lib.c:964:37: Call
    962.   BIGNUM *bn_wexpand(BIGNUM *a, int words)
    963.   {
    964.       return (words <= a->dmax) ? a : bn_expand2(a, words);
                                               ^
    965.   }
    966.   

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_bin2bn` 
        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;
}
['int ec_GF2m_simple_oct2point(const EC_GROUP *group, EC_POINT *point,\n                             const unsigned char *buf, size_t len,\n                             BN_CTX *ctx)\n{\n    point_conversion_form_t form;\n    int y_bit, m;\n    BN_CTX *new_ctx = NULL;\n    BIGNUM *x, *y, *yxi;\n    size_t field_len, enc_len;\n    int ret = 0;\n    if (len == 0) {\n        ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_BUFFER_TOO_SMALL);\n        return 0;\n    }\n    form = buf[0];\n    y_bit = form & 1;\n    form = form & ~1U;\n    if ((form != 0) && (form != POINT_CONVERSION_COMPRESSED)\n        && (form != POINT_CONVERSION_UNCOMPRESSED)\n        && (form != POINT_CONVERSION_HYBRID)) {\n        ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n        return 0;\n    }\n    if ((form == 0 || form == POINT_CONVERSION_UNCOMPRESSED) && y_bit) {\n        ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n        return 0;\n    }\n    if (form == 0) {\n        if (len != 1) {\n            ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n            return 0;\n        }\n        return EC_POINT_set_to_infinity(group, point);\n    }\n    m = EC_GROUP_get_degree(group);\n    field_len = (m + 7) / 8;\n    enc_len =\n        (form ==\n         POINT_CONVERSION_COMPRESSED) ? 1 + field_len : 1 + 2 * field_len;\n    if (len != enc_len) {\n        ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n        return 0;\n    }\n    if (ctx == NULL) {\n        ctx = new_ctx = BN_CTX_new();\n        if (ctx == NULL)\n            return 0;\n    }\n    BN_CTX_start(ctx);\n    x = BN_CTX_get(ctx);\n    y = BN_CTX_get(ctx);\n    yxi = BN_CTX_get(ctx);\n    if (yxi == NULL)\n        goto err;\n    if (!BN_bin2bn(buf + 1, field_len, x))\n        goto err;\n    if (BN_num_bits(x) > m) {\n        ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n        goto err;\n    }\n    if (form == POINT_CONVERSION_COMPRESSED) {\n        if (!EC_POINT_set_compressed_coordinates(group, point, x, y_bit, ctx))\n            goto err;\n    } else {\n        if (!BN_bin2bn(buf + 1 + field_len, field_len, y))\n            goto err;\n        if (BN_num_bits(y) > m) {\n            ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n            goto err;\n        }\n        if (form == POINT_CONVERSION_HYBRID) {\n            if (!group->meth->field_div(group, yxi, y, x, ctx))\n                goto err;\n            if (y_bit != BN_is_odd(yxi)) {\n                ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n                goto err;\n            }\n        }\n        if (!EC_POINT_set_affine_coordinates(group, point, x, y, ctx))\n            goto err;\n    }\n    ret = 1;\n err:\n    BN_CTX_end(ctx);\n    BN_CTX_free(new_ctx);\n    return ret;\n}', 'BIGNUM *BN_CTX_get(BN_CTX *ctx)\n{\n    BIGNUM *ret;\n    CTXDBG("ENTER 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    ret->flags &= (~BN_FLG_CONSTTIME);\n    ctx->used++;\n    CTXDBG("LEAVE BN_CTX_get()", ctx);\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    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_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}']