crypto/bn/bn_prime.c:292: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_MONT_CTX_set`.
Showing all 21 steps of the trace


crypto/bn/bn_prime.c:292:26: Call
290.       /* Montgomery setup for computations mod a */
291.       mont = BN_MONT_CTX_new();
292.       if (mont == NULL || !BN_MONT_CTX_set(mont, w, ctx))
                                ^
293.           goto err;
294.   

crypto/bn/bn_mont.c:263:1: Parameter `mont->N.top`
  261.   }
  262.   
  263. > int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *mod, BN_CTX *ctx)
  264.   {
  265.       int i, ret = 0;

crypto/bn/bn_mont.c:275:10: Call
  273.           goto err;
  274.       R = &(mont->RR);            /* grab RR as a temp */
  275.       if (!BN_copy(&(mont->N), mod))
                  ^
  276.           goto err;               /* Set N */
  277.       if (BN_get_flags(mod, BN_FLG_CONSTTIME) != 0)

crypto/bn/bn_lib.c:281:1: Parameter `a->top`
    279.   }
    280.   
    281. > BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)
    282.   {
    283.       bn_check_top(b);

crypto/bn/bn_lib.c:287:9: Call
    285.       if (a == b)
    286.           return a;
    287.       if (bn_wexpand(a, b->top) == NULL)
                   ^
    288.           return NULL;
    289.   

crypto/bn/bn_lib.c:960:1: Parameter `a->top`
      958.   }
      959.   
      960. > BIGNUM *bn_wexpand(BIGNUM *a, int words)
      961.   {
      962.       return (words <= a->dmax) ? a : bn_expand2(a, words);

crypto/bn/bn_lib.c:962:37: Call
      960.   BIGNUM *bn_wexpand(BIGNUM *a, int words)
      961.   {
      962.       return (words <= a->dmax) ? a : bn_expand2(a, words);
                                                 ^
      963.   }
      964.   

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_MONT_CTX_set` 
          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 bn_miller_rabin_is_prime(const BIGNUM *w, int iterations, BN_CTX *ctx,\n                             BN_GENCB *cb, int enhanced, int *status)\n{\n    int i, j, a, ret = 0;\n    BIGNUM *g, *w1, *w3, *x, *m, *z, *b;\n    BN_MONT_CTX *mont = NULL;\n    if (!BN_is_odd(w))\n        return 0;\n    BN_CTX_start(ctx);\n    g = BN_CTX_get(ctx);\n    w1 = BN_CTX_get(ctx);\n    w3 = BN_CTX_get(ctx);\n    x = BN_CTX_get(ctx);\n    m = BN_CTX_get(ctx);\n    z = BN_CTX_get(ctx);\n    b = BN_CTX_get(ctx);\n    if (!(b != NULL\n            && BN_copy(w1, w)\n            && BN_sub_word(w1, 1)\n            && BN_copy(w3, w)\n            && BN_sub_word(w3, 3)))\n        goto err;\n    if (BN_is_zero(w3) || BN_is_negative(w3))\n        goto err;\n    a = 1;\n    while (!BN_is_bit_set(w1, a))\n        a++;\n    if (!BN_rshift(m, w1, a))\n        goto err;\n    mont = BN_MONT_CTX_new();\n    if (mont == NULL || !BN_MONT_CTX_set(mont, w, ctx))\n        goto err;\n    if (iterations == BN_prime_checks)\n        iterations = BN_prime_checks_for_size(BN_num_bits(w));\n    for (i = 0; i < iterations; ++i) {\n        if (!BN_priv_rand_range(b, w3) || !BN_add_word(b, 2))\n            goto err;\n        if (enhanced) {\n            if (!BN_gcd(g, b, w, ctx))\n                goto err;\n            if (!BN_is_one(g)) {\n                *status = BN_PRIMETEST_COMPOSITE_WITH_FACTOR;\n                ret = 1;\n                goto err;\n            }\n        }\n        if (!BN_mod_exp_mont(z, b, m, w, ctx, mont))\n            goto err;\n        if (BN_is_one(z) || BN_cmp(z, w1) == 0)\n            goto outer_loop;\n        for (j = 1; j < a ; ++j) {\n            if (!BN_copy(x, z) || !BN_mod_mul(z, x, x, w, ctx))\n                goto err;\n            if (BN_cmp(z, w1) == 0)\n                goto outer_loop;\n            if (BN_is_one(z))\n                goto composite;\n        }\n        if (!BN_GENCB_call(cb, 1, i))\n            goto err;\n        if (!BN_copy(x, z) || !BN_mod_mul(z, x, x, w, ctx))\n            goto err;\n        if (BN_is_one(z))\n            goto composite;\n        if (!BN_copy(x, z))\n            goto err;\ncomposite:\n        if (enhanced) {\n            if (!BN_sub_word(x, 1) || !BN_gcd(g, x, w, ctx))\n                goto err;\n            if (BN_is_one(g))\n                *status = BN_PRIMETEST_COMPOSITE_NOT_POWER_OF_PRIME;\n            else\n                *status = BN_PRIMETEST_COMPOSITE_WITH_FACTOR;\n        } else {\n            *status = BN_PRIMETEST_COMPOSITE;\n        }\n        ret = 1;\n        goto err;\nouter_loop: ;\n    }\n    *status = BN_PRIMETEST_PROBABLY_PRIME;\n    ret = 1;\nerr:\n    BN_clear(g);\n    BN_clear(w1);\n    BN_clear(w3);\n    BN_clear(x);\n    BN_clear(m);\n    BN_clear(z);\n    BN_clear(b);\n    BN_CTX_end(ctx);\n    BN_MONT_CTX_free(mont);\n    return ret;\n}', 'int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *mod, BN_CTX *ctx)\n{\n    int i, ret = 0;\n    BIGNUM *Ri, *R;\n    if (BN_is_zero(mod))\n        return 0;\n    BN_CTX_start(ctx);\n    if ((Ri = BN_CTX_get(ctx)) == NULL)\n        goto err;\n    R = &(mont->RR);\n    if (!BN_copy(&(mont->N), mod))\n        goto err;\n    if (BN_get_flags(mod, BN_FLG_CONSTTIME) != 0)\n        BN_set_flags(&(mont->N), BN_FLG_CONSTTIME);\n    mont->N.neg = 0;\n#ifdef MONT_WORD\n    {\n        BIGNUM tmod;\n        BN_ULONG buf[2];\n        bn_init(&tmod);\n        tmod.d = buf;\n        tmod.dmax = 2;\n        tmod.neg = 0;\n        if (BN_get_flags(mod, BN_FLG_CONSTTIME) != 0)\n            BN_set_flags(&tmod, BN_FLG_CONSTTIME);\n        mont->ri = (BN_num_bits(mod) + (BN_BITS2 - 1)) / BN_BITS2 * BN_BITS2;\n# if defined(OPENSSL_BN_ASM_MONT) && (BN_BITS2<=32)\n        BN_zero(R);\n        if (!(BN_set_bit(R, 2 * BN_BITS2)))\n            goto err;\n        tmod.top = 0;\n        if ((buf[0] = mod->d[0]))\n            tmod.top = 1;\n        if ((buf[1] = mod->top > 1 ? mod->d[1] : 0))\n            tmod.top = 2;\n        if (BN_is_one(&tmod))\n            BN_zero(Ri);\n        else if ((BN_mod_inverse(Ri, R, &tmod, ctx)) == NULL)\n            goto err;\n        if (!BN_lshift(Ri, Ri, 2 * BN_BITS2))\n            goto err;\n        if (!BN_is_zero(Ri)) {\n            if (!BN_sub_word(Ri, 1))\n                goto err;\n        } else {\n            if (bn_expand(Ri, (int)sizeof(BN_ULONG) * 2) == NULL)\n                goto err;\n            Ri->neg = 0;\n            Ri->d[0] = BN_MASK2;\n            Ri->d[1] = BN_MASK2;\n            Ri->top = 2;\n        }\n        if (!BN_div(Ri, NULL, Ri, &tmod, ctx))\n            goto err;\n        mont->n0[0] = (Ri->top > 0) ? Ri->d[0] : 0;\n        mont->n0[1] = (Ri->top > 1) ? Ri->d[1] : 0;\n# else\n        BN_zero(R);\n        if (!(BN_set_bit(R, BN_BITS2)))\n            goto err;\n        buf[0] = mod->d[0];\n        buf[1] = 0;\n        tmod.top = buf[0] != 0 ? 1 : 0;\n        if (BN_is_one(&tmod))\n            BN_zero(Ri);\n        else if ((BN_mod_inverse(Ri, R, &tmod, ctx)) == NULL)\n            goto err;\n        if (!BN_lshift(Ri, Ri, BN_BITS2))\n            goto err;\n        if (!BN_is_zero(Ri)) {\n            if (!BN_sub_word(Ri, 1))\n                goto err;\n        } else {\n            if (!BN_set_word(Ri, BN_MASK2))\n                goto err;\n        }\n        if (!BN_div(Ri, NULL, Ri, &tmod, ctx))\n            goto err;\n        mont->n0[0] = (Ri->top > 0) ? Ri->d[0] : 0;\n        mont->n0[1] = 0;\n# endif\n    }\n#else\n    {\n        mont->ri = BN_num_bits(&mont->N);\n        BN_zero(R);\n        if (!BN_set_bit(R, mont->ri))\n            goto err;\n        if ((BN_mod_inverse(Ri, R, &mont->N, ctx)) == NULL)\n            goto err;\n        if (!BN_lshift(Ri, Ri, mont->ri))\n            goto err;\n        if (!BN_sub_word(Ri, 1))\n            goto err;\n        if (!BN_div(&(mont->Ni), NULL, Ri, &mont->N, ctx))\n            goto err;\n    }\n#endif\n    BN_zero(&(mont->RR));\n    if (!BN_set_bit(&(mont->RR), mont->ri * 2))\n        goto err;\n    if (!BN_mod(&(mont->RR), &(mont->RR), &(mont->N), ctx))\n        goto err;\n    for (i = mont->RR.top, ret = mont->N.top; i < ret; i++)\n        mont->RR.d[i] = 0;\n    mont->RR.top = ret;\n    mont->RR.flags |= BN_FLG_FIXED_TOP;\n    ret = 1;\n err:\n    BN_CTX_end(ctx);\n    return ret;\n}', 'BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)\n{\n    bn_check_top(b);\n    if (a == b)\n        return a;\n    if (bn_wexpand(a, b->top) == NULL)\n        return NULL;\n    if (b->top > 0)\n        memcpy(a->d, b->d, sizeof(b->d[0]) * b->top);\n    a->neg = b->neg;\n    a->top = b->top;\n    a->flags |= b->flags & BN_FLG_FIXED_TOP;\n    bn_check_top(a);\n    return a;\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}']