crypto/dh/dh_gen.c:87: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 536870848] by call to `BN_set_word`.
Showing all 16 steps of the trace


crypto/dh/dh_gen.c:69:10: Call
67.           goto err;
68.       BN_CTX_start(ctx);
69.       t1 = BN_CTX_get(ctx);
               ^
70.       t2 = BN_CTX_get(ctx);
71.       if (t2 == NULL)

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:394:15: Assignment
    392.       a->neg = 0;
    393.       a->d[0] = w;
    394.       a->top = (w ? 1 : 0);
                         ^
    395.       bn_check_top(a);
    396.       return 1;

crypto/bn/bn_lib.c:394:5: Assignment
    392.       a->neg = 0;
    393.       a->d[0] = w;
    394.       a->top = (w ? 1 : 0);
               ^
    395.       bn_check_top(a);
    396.       return 1;

crypto/dh/dh_gen.c:87:14: Call
85.           if (!BN_set_word(t1, 24))
86.               goto err;
87.           if (!BN_set_word(t2, 11))
                   ^
88.               goto err;
89.           g = 2;

crypto/bn/bn_lib.c:387:1: Parameter `*a->d`
  385.   }
  386.   
  387. > int BN_set_word(BIGNUM *a, BN_ULONG w)
  388.   {
  389.       bn_check_top(a);

crypto/bn/bn_lib.c:390:9: Call
  388.   {
  389.       bn_check_top(a);
  390.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                 ^
  391.           return 0;
  392.       a->neg = 0;

crypto/bn/bn_lcl.h:651:1: Parameter `*a->d`
    649.                            const BIGNUM *add, const BIGNUM *rem, BN_CTX *ctx);
    650.   
    651. > static ossl_inline BIGNUM *bn_expand(BIGNUM *a, int bits)
    652.   {
    653.       if (bits > (INT_MAX - BN_BITS2 + 1))

crypto/bn/bn_lcl.h:659:12: Call
    657.           return a;
    658.   
    659.       return bn_expand2((a),(bits+BN_BITS2-1)/BN_BITS2);
                      ^
    660.   }
    661.   

crypto/bn/bn_lib.c:273:1: Parameter `*b->d`
      271.    */
      272.   
      273. > BIGNUM *bn_expand2(BIGNUM *b, int words)
      274.   {
      275.       bn_check_top(b);

crypto/bn/bn_lib.c:278:23: Call
      276.   
      277.       if (words > b->dmax) {
      278.           BN_ULONG *a = bn_expand_internal(b, words);
                                   ^
      279.           if (!a)
      280.               return NULL;

crypto/bn/bn_lib.c:235:1: <Offset trace>
233.   /* This is used by bn_expand2() */
234.   /* The caller MUST check that words > b->dmax before calling this */
235. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
236.   {
237.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:235:1: Parameter `b->top`
        233.   /* This is used by bn_expand2() */
        234.   /* The caller MUST check that words > b->dmax before calling this */
        235. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
        236.   {
        237.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:235:1: <Length trace>
233.   /* This is used by bn_expand2() */
234.   /* The caller MUST check that words > b->dmax before calling this */
235. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
236.   {
237.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:235:1: Parameter `*b->d`
        233.   /* This is used by bn_expand2() */
        234.   /* The caller MUST check that words > b->dmax before calling this */
        235. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
        236.   {
        237.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:260:9: Array access: Offset added: [8, +oo] Size: [0, 536870848] by call to `BN_set_word` 
        258.       assert(b->top <= words);
        259.       if (b->top > 0)
        260.           memcpy(a, b->d, sizeof(*a) * b->top);
                       ^
        261.   
        262.       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;
}
['static int dh_builtin_genparams(DH *ret, int prime_len, int generator,\n                                BN_GENCB *cb)\n{\n    BIGNUM *t1, *t2;\n    int g, ok = -1;\n    BN_CTX *ctx = NULL;\n    ctx = BN_CTX_new();\n    if (ctx == NULL)\n        goto err;\n    BN_CTX_start(ctx);\n    t1 = BN_CTX_get(ctx);\n    t2 = BN_CTX_get(ctx);\n    if (t2 == NULL)\n        goto err;\n    if (!ret->p && ((ret->p = BN_new()) == NULL))\n        goto err;\n    if (!ret->g && ((ret->g = BN_new()) == NULL))\n        goto err;\n    if (generator <= 1) {\n        DHerr(DH_F_DH_BUILTIN_GENPARAMS, DH_R_BAD_GENERATOR);\n        goto err;\n    }\n    if (generator == DH_GENERATOR_2) {\n        if (!BN_set_word(t1, 24))\n            goto err;\n        if (!BN_set_word(t2, 11))\n            goto err;\n        g = 2;\n    } else if (generator == DH_GENERATOR_5) {\n        if (!BN_set_word(t1, 10))\n            goto err;\n        if (!BN_set_word(t2, 3))\n            goto err;\n        g = 5;\n    } else {\n        if (!BN_set_word(t1, 2))\n            goto err;\n        if (!BN_set_word(t2, 1))\n            goto err;\n        g = generator;\n    }\n    if (!BN_generate_prime_ex(ret->p, prime_len, 1, t1, t2, cb))\n        goto err;\n    if (!BN_GENCB_call(cb, 3, 0))\n        goto err;\n    if (!BN_set_word(ret->g, g))\n        goto err;\n    ok = 1;\n err:\n    if (ok == -1) {\n        DHerr(DH_F_DH_BUILTIN_GENPARAMS, ERR_R_BN_LIB);\n        ok = 0;\n    }\n    if (ctx != NULL) {\n        BN_CTX_end(ctx);\n        BN_CTX_free(ctx);\n    }\n    return ok;\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}', 'static ossl_inline BIGNUM *bn_expand(BIGNUM *a, int bits)\n{\n    if (bits > (INT_MAX - BN_BITS2 + 1))\n        return NULL;\n    if (((bits+BN_BITS2-1)/BN_BITS2) <= (a)->dmax)\n        return a;\n    return bn_expand2((a),(bits+BN_BITS2-1)/BN_BITS2);\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}']