crypto/ec/ecp_smpl.c:1663: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_mod_add_quick`.
Showing all 25 steps of the trace


crypto/ec/ecp_smpl.c:1643:10: Call
1641.   
1642.       BN_CTX_start(ctx);
1643.       t0 = BN_CTX_get(ctx);
                 ^
1644.       t1 = BN_CTX_get(ctx);
1645.       t2 = 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.       /* clear BN_FLG_CONSTTIME if leaked from previous frames */
  231.       ret->flags &= (~BN_FLG_CONSTTIME);

crypto/bn/bn_lib.c:366:15: Assignment
    364.       a->neg = 0;
    365.       a->d[0] = w;
    366.       a->top = (w ? 1 : 0);
                         ^
    367.       a->flags &= ~BN_FLG_FIXED_TOP;
    368.       bn_check_top(a);

crypto/bn/bn_lib.c:366:5: Assignment
    364.       a->neg = 0;
    365.       a->d[0] = w;
    366.       a->top = (w ? 1 : 0);
               ^
    367.       a->flags &= ~BN_FLG_FIXED_TOP;
    368.       bn_check_top(a);

crypto/ec/ecp_smpl.c:1663:13: Call
1661.           || !group->meth->field_mul(group, t6, t2, group->a, ctx)
1662.           || !group->meth->field_mul(group, t5, r->X, p->X, ctx)
1663.           || !BN_mod_add_quick(t5, t6, t5, group->field)
                    ^
1664.           || !group->meth->field_mul(group, t6, r->Z, p->X, ctx)
1665.           || !BN_mod_add_quick(t2, t6, t1, group->field)

crypto/bn/bn_mod.c:95:1: Parameter `r->top`
  93.   }
  94.   
  95. > int BN_mod_add_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
  96.                        const BIGNUM *m)
  97.   {

crypto/bn/bn_mod.c:98:15: Call
  96.                        const BIGNUM *m)
  97.   {
  98.       int ret = bn_mod_add_fixed_top(r, a, b, m);
                       ^
  99.   
  100.       if (ret)

crypto/bn/bn_mod.c:48:1: Parameter `r->top`
    46.    * move depending on whether or not subtraction borrowed.
    47.    */
    48. > int bn_mod_add_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
    49.                            const BIGNUM *m)
    50.   {

crypto/bn/bn_mod.c:56:9: Call
    54.       const BN_ULONG *ap, *bp;
    55.   
    56.       if (bn_wexpand(r, mtop) == NULL)
                  ^
    57.           return 0;
    58.   

crypto/bn/bn_lib.c:939:1: Parameter `a->top`
      937.   }
      938.   
      939. > BIGNUM *bn_wexpand(BIGNUM *a, int words)
      940.   {
      941.       return (words <= a->dmax) ? a : bn_expand2(a, words);

crypto/bn/bn_lib.c:941:37: Call
      939.   BIGNUM *bn_wexpand(BIGNUM *a, int words)
      940.   {
      941.       return (words <= a->dmax) ? a : bn_expand2(a, words);
                                                 ^
      942.   }
      943.   

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_quick` 
          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_GFp_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, *t3, *t4, *t5, *t6 = 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 (!group->meth->field_mul(group, r->X, p->X, p->Z, ctx)\n            || !group->meth->field_sqr(group, r->Z, p->Z, ctx)\n            || !group->meth->field_mul(group, r->Y, p->Y, r->Z, ctx)\n            || !BN_copy(r->Z, p->Z)\n            || !EC_POINT_invert(group, r, ctx))\n            return 0;\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    t3 = BN_CTX_get(ctx);\n    t4 = BN_CTX_get(ctx);\n    t5 = BN_CTX_get(ctx);\n    t6 = BN_CTX_get(ctx);\n    if (t6 == NULL\n        || !BN_mod_lshift1_quick(t0, p->Y, group->field)\n        || !group->meth->field_mul(group, t1, r->X, p->Z, ctx)\n        || !group->meth->field_mul(group, t2, r->Z, s->Z, ctx)\n        || !group->meth->field_mul(group, t2, t1, t2, ctx)\n        || !group->meth->field_mul(group, t3, t2, t0, ctx)\n        || !group->meth->field_mul(group, t2, r->Z, p->Z, ctx)\n        || !group->meth->field_sqr(group, t4, t2, ctx)\n        || !BN_mod_lshift1_quick(t5, group->b, group->field)\n        || !group->meth->field_mul(group, t4, t4, t5, ctx)\n        || !group->meth->field_mul(group, t6, t2, group->a, ctx)\n        || !group->meth->field_mul(group, t5, r->X, p->X, ctx)\n        || !BN_mod_add_quick(t5, t6, t5, group->field)\n        || !group->meth->field_mul(group, t6, r->Z, p->X, ctx)\n        || !BN_mod_add_quick(t2, t6, t1, group->field)\n        || !group->meth->field_mul(group, t5, t5, t2, ctx)\n        || !BN_mod_sub_quick(t6, t6, t1, group->field)\n        || !group->meth->field_sqr(group, t6, t6, ctx)\n        || !group->meth->field_mul(group, t6, t6, s->X, ctx)\n        || !BN_mod_add_quick(t4, t5, t4, group->field)\n        || !group->meth->field_mul(group, t4, t4, s->Z, ctx)\n        || !BN_mod_sub_quick(t4, t4, t6, group->field)\n        || !group->meth->field_sqr(group, t5, r->Z, ctx)\n        || !group->meth->field_mul(group, r->Z, p->Z, s->Z, ctx)\n        || !group->meth->field_mul(group, r->Z, t5, r->Z, ctx)\n        || !group->meth->field_mul(group, r->Z, r->Z, t0, ctx)\n        || !group->meth->field_mul(group, r->X, t3, r->Z, ctx)\n        || !group->meth->field_sqr(group, t3, r->Z, ctx)\n        || !group->meth->field_mul(group, r->Y, t4, t3, ctx))\n        goto err;\n    ret = 1;\n err:\n    BN_CTX_end(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    ret->flags &= (~BN_FLG_CONSTTIME);\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    a->flags &= ~BN_FLG_FIXED_TOP;\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    int ret = bn_mod_add_fixed_top(r, a, b, m);\n    if (ret)\n        bn_correct_top(r);\n    return ret;\n}', 'int bn_mod_add_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,\n                         const BIGNUM *m)\n{\n    size_t i, ai, bi, mtop = m->top;\n    BN_ULONG storage[1024 / BN_BITS2];\n    BN_ULONG carry, temp, mask, *rp, *tp = storage;\n    const BN_ULONG *ap, *bp;\n    if (bn_wexpand(r, mtop) == NULL)\n        return 0;\n    if (mtop > sizeof(storage) / sizeof(storage[0])\n        && (tp = OPENSSL_malloc(mtop * sizeof(BN_ULONG))) == NULL)\n        return 0;\n    ap = a->d != NULL ? a->d : tp;\n    bp = b->d != NULL ? b->d : tp;\n    for (i = 0, ai = 0, bi = 0, carry = 0; i < mtop;) {\n        mask = (BN_ULONG)0 - ((i - a->top) >> (8 * sizeof(i) - 1));\n        temp = ((ap[ai] & mask) + carry) & BN_MASK2;\n        carry = (temp < carry);\n        mask = (BN_ULONG)0 - ((i - b->top) >> (8 * sizeof(i) - 1));\n        tp[i] = ((bp[bi] & mask) + temp) & BN_MASK2;\n        carry += (tp[i] < temp);\n        i++;\n        ai += (i - a->dmax) >> (8 * sizeof(i) - 1);\n        bi += (i - b->dmax) >> (8 * sizeof(i) - 1);\n    }\n    rp = r->d;\n    carry -= bn_sub_words(rp, tp, m->d, mtop);\n    for (i = 0; i < mtop; i++) {\n        rp[i] = (carry & tp[i]) | (~carry & rp[i]);\n        ((volatile BN_ULONG *)tp)[i] = 0;\n    }\n    r->top = mtop;\n    r->flags |= BN_FLG_FIXED_TOP;\n    r->neg = 0;\n    if (tp != storage)\n        OPENSSL_free(tp);\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}']