crypto/ec/ecp_smpl.c:1017: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 536870848] by call to `BN_mod_add_quick`.
Showing all 18 steps of the trace


crypto/ec/ecp_smpl.c:975:10: Call
973.   
974.       BN_CTX_start(ctx);
975.       rh = BN_CTX_get(ctx);
                ^
976.       tmp = BN_CTX_get(ctx);
977.       Z4 = BN_CTX_get(ctx);

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:402:15: Assignment
    400.       a->neg = 0;
    401.       a->d[0] = w;
    402.       a->top = (w ? 1 : 0);
                         ^
    403.       bn_check_top(a);
    404.       return (1);

crypto/bn/bn_lib.c:402:5: Assignment
    400.       a->neg = 0;
    401.       a->d[0] = w;
    402.       a->top = (w ? 1 : 0);
               ^
    403.       bn_check_top(a);
    404.       return (1);

crypto/ec/ecp_smpl.c:1017:18: Call
1015.               if (!field_mul(group, tmp, Z4, group->a, ctx))
1016.                   goto err;
1017.               if (!BN_mod_add_quick(rh, rh, tmp, p))
                         ^
1018.                   goto err;
1019.               if (!field_mul(group, rh, rh, point->X, ctx))

crypto/bn/bn_mod.c:40:1: Parameter `*r->d`
  38.    * less than m
  39.    */
  40. > int BN_mod_add_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
  41.                        const BIGNUM *m)
  42.   {

crypto/bn/bn_mod.c:43:10: Call
  41.                        const BIGNUM *m)
  42.   {
  43.       if (!BN_uadd(r, a, b))
                 ^
  44.           return 0;
  45.       if (BN_ucmp(r, m) >= 0)

crypto/bn/bn_add.c:58:1: Parameter `*r->d`
    56.   
    57.   /* unsigned add of b to a */
    58. > int BN_uadd(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)
    59.   {
    60.       int max, min, dif;

crypto/bn/bn_add.c:78:9: Call
    76.       dif = max - min;
    77.   
    78.       if (bn_wexpand(r, max + 1) == NULL)
                  ^
    79.           return 0;
    80.   

crypto/bn/bn_lib.c:948:1: Parameter `*a->d`
      946.   }
      947.   
      948. > BIGNUM *bn_wexpand(BIGNUM *a, int words)
      949.   {
      950.       return (words <= a->dmax) ? a : bn_expand2(a, words);

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

crypto/bn/bn_lib.c:284:1: Parameter `*b->d`
        282.    */
        283.   
        284. > BIGNUM *bn_expand2(BIGNUM *b, int words)
        285.   {
        286.       bn_check_top(b);

crypto/bn/bn_lib.c:289:23: Call
        287.   
        288.       if (words > b->dmax) {
        289.           BN_ULONG *a = bn_expand_internal(b, words);
                                     ^
        290.           if (!a)
        291.               return NULL;

crypto/bn/bn_lib.c:246:1: <Offset 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 = NULL;

crypto/bn/bn_lib.c:246:1: Parameter `b->top`
          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 = 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 = 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 = NULL;

crypto/bn/bn_lib.c:271:9: Array access: Offset added: [8, +oo] Size: [0, 536870848] by call to `BN_mod_add_quick` 
          269.       assert(b->top <= words);
          270.       if (b->top > 0)
          271.           memcpy(a, b->d, sizeof(*a) * b->top);
                         ^
          272.   
          273.       return a;

static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
{
    BN_ULONG *a = NULL;
    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 = 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_GFp_simple_is_on_curve(const EC_GROUP *group, const EC_POINT *point,\n                              BN_CTX *ctx)\n{\n    int (*field_mul) (const EC_GROUP *, BIGNUM *, const BIGNUM *,\n                      const BIGNUM *, BN_CTX *);\n    int (*field_sqr) (const EC_GROUP *, BIGNUM *, const BIGNUM *, BN_CTX *);\n    const BIGNUM *p;\n    BN_CTX *new_ctx = NULL;\n    BIGNUM *rh, *tmp, *Z4, *Z6;\n    int ret = -1;\n    if (EC_POINT_is_at_infinity(group, point))\n        return 1;\n    field_mul = group->meth->field_mul;\n    field_sqr = group->meth->field_sqr;\n    p = group->field;\n    if (ctx == NULL) {\n        ctx = new_ctx = BN_CTX_new();\n        if (ctx == NULL)\n            return -1;\n    }\n    BN_CTX_start(ctx);\n    rh = BN_CTX_get(ctx);\n    tmp = BN_CTX_get(ctx);\n    Z4 = BN_CTX_get(ctx);\n    Z6 = BN_CTX_get(ctx);\n    if (Z6 == NULL)\n        goto err;\n    if (!field_sqr(group, rh, point->X, ctx))\n        goto err;\n    if (!point->Z_is_one) {\n        if (!field_sqr(group, tmp, point->Z, ctx))\n            goto err;\n        if (!field_sqr(group, Z4, tmp, ctx))\n            goto err;\n        if (!field_mul(group, Z6, Z4, tmp, ctx))\n            goto err;\n        if (group->a_is_minus3) {\n            if (!BN_mod_lshift1_quick(tmp, Z4, p))\n                goto err;\n            if (!BN_mod_add_quick(tmp, tmp, Z4, p))\n                goto err;\n            if (!BN_mod_sub_quick(rh, rh, tmp, p))\n                goto err;\n            if (!field_mul(group, rh, rh, point->X, ctx))\n                goto err;\n        } else {\n            if (!field_mul(group, tmp, Z4, group->a, ctx))\n                goto err;\n            if (!BN_mod_add_quick(rh, rh, tmp, p))\n                goto err;\n            if (!field_mul(group, rh, rh, point->X, ctx))\n                goto err;\n        }\n        if (!field_mul(group, tmp, group->b, Z6, ctx))\n            goto err;\n        if (!BN_mod_add_quick(rh, rh, tmp, p))\n            goto err;\n    } else {\n        if (!BN_mod_add_quick(rh, rh, group->a, p))\n            goto err;\n        if (!field_mul(group, rh, rh, point->X, ctx))\n            goto err;\n        if (!BN_mod_add_quick(rh, rh, group->b, p))\n            goto err;\n    }\n    if (!field_sqr(group, tmp, point->Y, ctx))\n        goto err;\n    ret = (0 == BN_ucmp(tmp, rh));\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_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}', 'int BN_mod_add_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,\n                     const BIGNUM *m)\n{\n    if (!BN_uadd(r, a, b))\n        return 0;\n    if (BN_ucmp(r, m) >= 0)\n        return BN_usub(r, r, m);\n    return 1;\n}', 'int BN_uadd(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)\n{\n    int max, min, dif;\n    const BN_ULONG *ap, *bp;\n    BN_ULONG *rp, carry, t1, t2;\n    bn_check_top(a);\n    bn_check_top(b);\n    if (a->top < b->top) {\n        const BIGNUM *tmp;\n        tmp = a;\n        a = b;\n        b = tmp;\n    }\n    max = a->top;\n    min = b->top;\n    dif = max - min;\n    if (bn_wexpand(r, max + 1) == NULL)\n        return 0;\n    r->top = max;\n    ap = a->d;\n    bp = b->d;\n    rp = r->d;\n    carry = bn_add_words(rp, ap, bp, min);\n    rp += min;\n    ap += min;\n    while (dif) {\n        dif--;\n        t1 = *(ap++);\n        t2 = (t1 + carry) & BN_MASK2;\n        *(rp++) = t2;\n        carry &= (t2 == 0);\n    }\n    *rp = carry;\n    r->top += carry;\n    r->neg = 0;\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}', '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 = NULL;\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 = 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}']