crypto/ec/ec2_smpl.c:816: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_GF2m_add`.
Showing all 21 steps of the trace


crypto/ec/ec2_smpl.c:813:13: Call
811.           || !BN_GF2m_add(t1, t2, t1)
812.           || !group->meth->field_mul(group, t2, p->X, t0, ctx)
813.           || !BN_GF2m_mod_inv(t2, t2, group->field, ctx)
                   ^
814.           || !group->meth->field_mul(group, t1, t1, t2, ctx)
815.           || !group->meth->field_mul(group, r->X, r->Z, t2, ctx)

crypto/bn/bn_gf2m.c:724:1: Parameter `r->top`
  722.    * But it does eliminate first order deduction on the input.
  723.    */
  724. > int BN_GF2m_mod_inv(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx)
  725.   {
  726.       BIGNUM *b = NULL;

crypto/ec/ec2_smpl.c:816:13: Call
814.           || !group->meth->field_mul(group, t1, t1, t2, ctx)
815.           || !group->meth->field_mul(group, r->X, r->Z, t2, ctx)
816.           || !BN_GF2m_add(t2, p->X, r->X)
                   ^
817.           || !group->meth->field_mul(group, t2, t2, t1, ctx)
818.           || !BN_GF2m_add(r->Y, p->Y, t2)

crypto/bn/bn_gf2m.c:252:1: Parameter `r->top`
  250.    * could be equal; r is the bitwise XOR of a and b.
  251.    */
  252. > int BN_GF2m_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)
  253.   {
  254.       int i;

crypto/bn/bn_gf2m.c:268:9: Call
  266.       }
  267.   
  268.       if (bn_wexpand(r, at->top) == NULL)
                 ^
  269.           return 0;
  270.   

crypto/bn/bn_lib.c:949:1: Parameter `a->top`
    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->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_GF2m_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\nint ec_GF2m_simple_ladder_post(const EC_GROUP *group,\n                               EC_POINT *r, EC_POINT *s,\n                               EC_POINT *p, BN_CTX *ctx)\n{\n    int ret = 0;\n    BIGNUM *t0, *t1, *t2 = NULL;\n    if (BN_is_zero(r->Z))\n        return EC_POINT_set_to_infinity(group, r);\n    if (BN_is_zero(s->Z)) {\n        if (!EC_POINT_copy(r, p)\n            || !EC_POINT_invert(group, r, ctx)) {\n            ECerr(EC_F_EC_GF2M_SIMPLE_LADDER_POST, ERR_R_EC_LIB);\n            return 0;\n        }\n        return 1;\n    }\n    BN_CTX_start(ctx);\n    t0 = BN_CTX_get(ctx);\n    t1 = BN_CTX_get(ctx);\n    t2 = BN_CTX_get(ctx);\n    if (t2 == NULL) {\n        ECerr(EC_F_EC_GF2M_SIMPLE_LADDER_POST, ERR_R_MALLOC_FAILURE);\n        goto err;\n    }\n    if (!group->meth->field_mul(group, t0, r->Z, s->Z, ctx)\n        || !group->meth->field_mul(group, t1, p->X, r->Z, ctx)\n        || !BN_GF2m_add(t1, r->X, t1)\n        || !group->meth->field_mul(group, t2, p->X, s->Z, ctx)\n        || !group->meth->field_mul(group, r->Z, r->X, t2, ctx)\n        || !BN_GF2m_add(t2, t2, s->X)\n        || !group->meth->field_mul(group, t1, t1, t2, ctx)\n        || !group->meth->field_sqr(group, t2, p->X, ctx)\n        || !BN_GF2m_add(t2, p->Y, t2)\n        || !group->meth->field_mul(group, t2, t2, t0, ctx)\n        || !BN_GF2m_add(t1, t2, t1)\n        || !group->meth->field_mul(group, t2, p->X, t0, ctx)\n        || !BN_GF2m_mod_inv(t2, t2, group->field, ctx)\n        || !group->meth->field_mul(group, t1, t1, t2, ctx)\n        || !group->meth->field_mul(group, r->X, r->Z, t2, ctx)\n        || !BN_GF2m_add(t2, p->X, r->X)\n        || !group->meth->field_mul(group, t2, t2, t1, ctx)\n        || !BN_GF2m_add(r->Y, p->Y, t2)\n        || !BN_one(r->Z))\n        goto err;\n    r->Z_is_one = 1;\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}', 'int BN_GF2m_mod_inv(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx)\n{\n    BIGNUM *b = NULL;\n    int ret = 0;\n    BN_CTX_start(ctx);\n    if ((b = BN_CTX_get(ctx)) == NULL)\n        goto err;\n    do {\n        if (!BN_priv_rand(b, BN_num_bits(p) - 1,\n                          BN_RAND_TOP_ANY, BN_RAND_BOTTOM_ANY))\n            goto err;\n    } while (BN_is_zero(b));\n    if (!BN_GF2m_mod_mul(r, a, b, p, ctx))\n        goto err;\n    if (!BN_GF2m_mod_inv_vartime(r, r, p, ctx))\n        goto err;\n    if (!BN_GF2m_mod_mul(r, r, b, p, ctx))\n        goto err;\n    ret = 1;\n err:\n    BN_CTX_end(ctx);\n    return ret;\n}', 'int BN_GF2m_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)\n{\n    int i;\n    const BIGNUM *at, *bt;\n    bn_check_top(a);\n    bn_check_top(b);\n    if (a->top < b->top) {\n        at = b;\n        bt = a;\n    } else {\n        at = a;\n        bt = b;\n    }\n    if (bn_wexpand(r, at->top) == NULL)\n        return 0;\n    for (i = 0; i < bt->top; i++) {\n        r->d[i] = at->d[i] ^ bt->d[i];\n    }\n    for (; i < at->top; i++) {\n        r->d[i] = at->d[i];\n    }\n    r->top = at->top;\n    bn_correct_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    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}']