crypto/sm2/sm2_sign.c:120: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_mod_add`.
Showing all 26 steps of the trace


crypto/sm2/sm2_sign.c:117:14: Call
115.           }
116.   
117.           if (!EC_POINT_mul(group, kG, k, NULL, NULL, ctx)
                    ^
118.                   || !EC_POINT_get_affine_coordinates(group, kG, x1, NULL,
119.                                                           ctx)

crypto/ec/ec_lib.c:958:12: Call
  956.       scalars[0] = p_scalar;
  957.   
  958.       return EC_POINTs_mul(group, r, g_scalar,
                    ^
  959.                            (point != NULL
  960.                             && p_scalar != NULL), points, scalars, ctx);

crypto/ec/ec_lib.c:909:1: Parameter `r->Z->top`
    907.    */
    908.   
    909. > int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar,
    910.                     size_t num, const EC_POINT *points[],
    911.                     const BIGNUM *scalars[], BN_CTX *ctx)

crypto/sm2/sm2_sign.c:120:21: Call
118.                   || !EC_POINT_get_affine_coordinates(group, kG, x1, NULL,
119.                                                           ctx)
120.                   || !BN_mod_add(r, e, x1, order, ctx)) {
                           ^
121.               SM2err(SM2_F_SM2_SIG_GEN, ERR_R_INTERNAL_ERROR);
122.               goto done;

crypto/bn/bn_mod.c:28:1: Parameter `r->top`
  26.   }
  27.   
  28. > int BN_mod_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m,
  29.                  BN_CTX *ctx)
  30.   {

crypto/bn/bn_mod.c:31:10: Call
  29.                  BN_CTX *ctx)
  30.   {
  31.       if (!BN_add(r, a, b))
                 ^
  32.           return 0;
  33.       return BN_nnmod(r, r, m, ctx);

crypto/bn/bn_add.c:14:1: Parameter `r->top`
    12.   
    13.   /* signed add of b to a. */
    14. > int BN_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)
    15.   {
    16.       int ret, r_neg, cmp_res;

crypto/bn/bn_add.c:28:19: Call
    26.           if (cmp_res > 0) {
    27.               r_neg = a->neg;
    28.               ret = BN_usub(r, a, b);
                            ^
    29.           } else if (cmp_res < 0) {
    30.               r_neg = b->neg;

crypto/bn/bn_add.c:125:1: Parameter `r->top`
      123.   
      124.   /* unsigned subtraction of b from a, a must be larger than b. */
      125. > int BN_usub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)
      126.   {
      127.       int max, min, dif;

crypto/bn/bn_add.c:143:9: Call
      141.       }
      142.   
      143.       if (bn_wexpand(r, max) == NULL)
                     ^
      144.           return 0;
      145.   

crypto/bn/bn_lib.c:948:1: Parameter `a->top`
        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:245:1: Parameter `b->top`
          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 `words`
            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:224:13: Call
            222.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
            223.       else
            224.           a = OPENSSL_zalloc(words * sizeof(*a));
                               ^
            225.       if (a == NULL) {
            226.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

crypto/mem.c:228:1: Parameter `num`
              226.   }
              227.   
              228. > void *CRYPTO_zalloc(size_t num, const char *file, int line)
              229.   {
              230.       void *ret = CRYPTO_malloc(num, file, line);

crypto/mem.c:230:17: Call
              228.   void *CRYPTO_zalloc(size_t num, const char *file, int line)
              229.   {
              230.       void *ret = CRYPTO_malloc(num, file, line);
                                     ^
              231.   
              232.       FAILTEST();

crypto/mem.c:201:9: Assignment
                199.   
                200.       if (num == 0)
                201.           return NULL;
                               ^
                202.   
                203.       FAILTEST();

crypto/mem.c:230:5: Assignment
              228.   void *CRYPTO_zalloc(size_t num, const char *file, int line)
              229.   {
              230.       void *ret = CRYPTO_malloc(num, file, line);
                         ^
              231.   
              232.       FAILTEST();

crypto/mem.c:235:5: Assignment
              233.       if (ret != NULL)
              234.           memset(ret, 0, num);
              235.       return ret;
                         ^
              236.   }
              237.   

crypto/bn/bn_lib.c:224:9: Assignment
            222.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
            223.       else
            224.           a = OPENSSL_zalloc(words * sizeof(*a));
                           ^
            225.       if (a == NULL) {
            226.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

crypto/bn/bn_lib.c:232:9: Array access: Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_mod_add` 
            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 ECDSA_SIG *sm2_sig_gen(const EC_KEY *key, const BIGNUM *e)\n{\n    const BIGNUM *dA = EC_KEY_get0_private_key(key);\n    const EC_GROUP *group = EC_KEY_get0_group(key);\n    const BIGNUM *order = EC_GROUP_get0_order(group);\n    ECDSA_SIG *sig = NULL;\n    EC_POINT *kG = NULL;\n    BN_CTX *ctx = NULL;\n    BIGNUM *k = NULL;\n    BIGNUM *rk = NULL;\n    BIGNUM *r = NULL;\n    BIGNUM *s = NULL;\n    BIGNUM *x1 = NULL;\n    BIGNUM *tmp = NULL;\n    kG = EC_POINT_new(group);\n    ctx = BN_CTX_new();\n    if (kG == NULL || ctx == NULL) {\n        SM2err(SM2_F_SM2_SIG_GEN, ERR_R_MALLOC_FAILURE);\n        goto done;\n    }\n    BN_CTX_start(ctx);\n    k = BN_CTX_get(ctx);\n    rk = BN_CTX_get(ctx);\n    x1 = BN_CTX_get(ctx);\n    tmp = BN_CTX_get(ctx);\n    if (tmp == NULL) {\n        SM2err(SM2_F_SM2_SIG_GEN, ERR_R_MALLOC_FAILURE);\n        goto done;\n    }\n    r = BN_new();\n    s = BN_new();\n    if (r == NULL || s == NULL) {\n        SM2err(SM2_F_SM2_SIG_GEN, ERR_R_MALLOC_FAILURE);\n        goto done;\n    }\n    for (;;) {\n        if (!BN_priv_rand_range(k, order)) {\n            SM2err(SM2_F_SM2_SIG_GEN, ERR_R_INTERNAL_ERROR);\n            goto done;\n        }\n        if (!EC_POINT_mul(group, kG, k, NULL, NULL, ctx)\n                || !EC_POINT_get_affine_coordinates(group, kG, x1, NULL,\n                                                        ctx)\n                || !BN_mod_add(r, e, x1, order, ctx)) {\n            SM2err(SM2_F_SM2_SIG_GEN, ERR_R_INTERNAL_ERROR);\n            goto done;\n        }\n        if (BN_is_zero(r))\n            continue;\n        if (!BN_add(rk, r, k)) {\n            SM2err(SM2_F_SM2_SIG_GEN, ERR_R_INTERNAL_ERROR);\n            goto done;\n        }\n        if (BN_cmp(rk, order) == 0)\n            continue;\n        if (!BN_add(s, dA, BN_value_one())\n                || !ec_group_do_inverse_ord(group, s, s, ctx)\n                || !BN_mod_mul(tmp, dA, r, order, ctx)\n                || !BN_sub(tmp, k, tmp)\n                || !BN_mod_mul(s, s, tmp, order, ctx)) {\n            SM2err(SM2_F_SM2_SIG_GEN, ERR_R_BN_LIB);\n            goto done;\n        }\n        sig = ECDSA_SIG_new();\n        if (sig == NULL) {\n            SM2err(SM2_F_SM2_SIG_GEN, ERR_R_MALLOC_FAILURE);\n            goto done;\n        }\n        ECDSA_SIG_set0(sig, r, s);\n        break;\n    }\n done:\n    if (sig == NULL) {\n        BN_free(r);\n        BN_free(s);\n    }\n    BN_CTX_free(ctx);\n    EC_POINT_free(kG);\n    return sig;\n}', 'int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar,\n                 const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx)\n{\n    const EC_POINT *points[1];\n    const BIGNUM *scalars[1];\n    points[0] = point;\n    scalars[0] = p_scalar;\n    return EC_POINTs_mul(group, r, g_scalar,\n                         (point != NULL\n                          && p_scalar != NULL), points, scalars, ctx);\n}', 'int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar,\n                  size_t num, const EC_POINT *points[],\n                  const BIGNUM *scalars[], BN_CTX *ctx)\n{\n    int ret = 0;\n    size_t i = 0;\n    BN_CTX *new_ctx = NULL;\n    if ((scalar == NULL) && (num == 0)) {\n        return EC_POINT_set_to_infinity(group, r);\n    }\n    if (!ec_point_is_compat(r, group)) {\n        ECerr(EC_F_EC_POINTS_MUL, EC_R_INCOMPATIBLE_OBJECTS);\n        return 0;\n    }\n    for (i = 0; i < num; i++) {\n        if (!ec_point_is_compat(points[i], group)) {\n            ECerr(EC_F_EC_POINTS_MUL, EC_R_INCOMPATIBLE_OBJECTS);\n            return 0;\n        }\n    }\n    if (ctx == NULL && (ctx = new_ctx = BN_CTX_secure_new()) == NULL) {\n        ECerr(EC_F_EC_POINTS_MUL, ERR_R_INTERNAL_ERROR);\n        return 0;\n    }\n    if (group->meth->mul != NULL)\n        ret = group->meth->mul(group, r, scalar, num, points, scalars, ctx);\n    else\n        ret = ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx);\n    BN_CTX_free(new_ctx);\n    return ret;\n}', 'int BN_mod_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m,\n               BN_CTX *ctx)\n{\n    if (!BN_add(r, a, b))\n        return 0;\n    return BN_nnmod(r, r, m, ctx);\n}', 'int BN_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)\n{\n    int ret, r_neg, cmp_res;\n    bn_check_top(a);\n    bn_check_top(b);\n    if (a->neg == b->neg) {\n        r_neg = a->neg;\n        ret = BN_uadd(r, a, b);\n    } else {\n        cmp_res = BN_ucmp(a, b);\n        if (cmp_res > 0) {\n            r_neg = a->neg;\n            ret = BN_usub(r, a, b);\n        } else if (cmp_res < 0) {\n            r_neg = b->neg;\n            ret = BN_usub(r, b, a);\n        } else {\n            r_neg = 0;\n            BN_zero(r);\n            ret = 1;\n        }\n    }\n    r->neg = r_neg;\n    bn_check_top(r);\n    return ret;\n}', 'int BN_usub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)\n{\n    int max, min, dif;\n    BN_ULONG t1, t2, borrow, *rp;\n    const BN_ULONG *ap, *bp;\n    bn_check_top(a);\n    bn_check_top(b);\n    max = a->top;\n    min = b->top;\n    dif = max - min;\n    if (dif < 0) {\n        BNerr(BN_F_BN_USUB, BN_R_ARG2_LT_ARG3);\n        return 0;\n    }\n    if (bn_wexpand(r, max) == NULL)\n        return 0;\n    ap = a->d;\n    bp = b->d;\n    rp = r->d;\n    borrow = bn_sub_words(rp, ap, bp, min);\n    ap += min;\n    rp += min;\n    while (dif) {\n        dif--;\n        t1 = *(ap++);\n        t2 = (t1 - borrow) & BN_MASK2;\n        *(rp++) = t2;\n        borrow &= (t1 == 0);\n    }\n    while (max && *--rp == 0)\n        max--;\n    r->top = max;\n    r->neg = 0;\n    bn_pollute(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    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}', 'void *CRYPTO_zalloc(size_t num, const char *file, int line)\n{\n    void *ret = CRYPTO_malloc(num, file, line);\n    FAILTEST();\n    if (ret != NULL)\n        memset(ret, 0, num);\n    return ret;\n}', 'void *CRYPTO_malloc(size_t num, const char *file, int line)\n{\n    void *ret = NULL;\n    INCREMENT(malloc_count);\n    if (malloc_impl != NULL && malloc_impl != CRYPTO_malloc)\n        return malloc_impl(num, file, line);\n    if (num == 0)\n        return NULL;\n    FAILTEST();\n    if (allow_customize) {\n        allow_customize = 0;\n    }\n#ifndef OPENSSL_NO_CRYPTO_MDEBUG\n    if (call_malloc_debug) {\n        CRYPTO_mem_debug_malloc(NULL, num, 0, file, line);\n        ret = malloc(num);\n        CRYPTO_mem_debug_malloc(ret, num, 1, file, line);\n    } else {\n        ret = malloc(num);\n    }\n#else\n    (void)(file); (void)(line);\n    ret = malloc(num);\n#endif\n    return ret;\n}']