test/ec_internal_test.c:36: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 536870848] by call to `BN_pseudo_rand`.
Showing all 22 steps of the trace


test/ec_internal_test.c:29:9: Call
27.   
28.       BN_CTX_start(ctx);
29.       a = BN_CTX_get(ctx);
              ^
30.       b = BN_CTX_get(ctx);
31.       if (!TEST_ptr(c = 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.       ctx->used++;
  231.       CTXDBG_RET(ctx, ret);

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);

test/ec_internal_test.c:36:13: Call
34.           || !TEST_true(BN_is_one(b))
35.           /* (1/a)*a = 1 */
36.           || !TEST_true(BN_pseudo_rand(a, BN_num_bits(group->field) - 1,
                  ^
37.                                        BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY))
38.           || !TEST_true(group->meth->field_inv(group, b, a, ctx))

crypto/bn/bn_rand.c:187:1: Parameter `*rnd->d`
  185.   }
  186.   
  187. > int BN_pseudo_rand(BIGNUM *rnd, int bits, int top, int bottom)
  188.   {
  189.       return BN_rand(rnd, bits, top, bottom);

crypto/bn/bn_rand.c:189:12: Call
  187.   int BN_pseudo_rand(BIGNUM *rnd, int bits, int top, int bottom)
  188.   {
  189.       return BN_rand(rnd, bits, top, bottom);
                    ^
  190.   }
  191.   

crypto/bn/bn_rand.c:97:1: Parameter `*rnd->d`
    95.   }
    96.   
    97. > int BN_rand(BIGNUM *rnd, int bits, int top, int bottom)
    98.   {
    99.       return bnrand(NORMAL, rnd, bits, top, bottom);

crypto/bn/bn_rand.c:99:12: Call
    97.   int BN_rand(BIGNUM *rnd, int bits, int top, int bottom)
    98.   {
    99.       return bnrand(NORMAL, rnd, bits, top, bottom);
                      ^
    100.   }
    101.   

crypto/bn/bn_rand.c:21:1: Parameter `*rnd->d`
      19.   } BNRAND_FLAG;
      20.   
      21. > static int bnrand(BNRAND_FLAG flag, BIGNUM *rnd, int bits, int top, int bottom)
      22.   {
      23.       unsigned char *buf = NULL;

crypto/bn/bn_rand.c:29:9: Call
      27.           if (top != BN_RAND_TOP_ANY || bottom != BN_RAND_BOTTOM_ANY)
      28.               goto toosmall;
      29.           BN_zero(rnd);
                    ^
      30.           return 1;
      31.       }

crypto/bn/bn_lib.c:359:1: Parameter `*a->d`
        357.   }
        358.   
        359. > int BN_set_word(BIGNUM *a, BN_ULONG w)
        360.   {
        361.       bn_check_top(a);

crypto/bn/bn_lib.c:362:9: Call
        360.   {
        361.       bn_check_top(a);
        362.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                       ^
        363.           return 0;
        364.       a->neg = 0;

crypto/bn/bn_lcl.h:660:1: Parameter `*a->d`
          658.                            const BIGNUM *add, const BIGNUM *rem, BN_CTX *ctx);
          659.   
          660. > static ossl_inline BIGNUM *bn_expand(BIGNUM *a, int bits)
          661.   {
          662.       if (bits > (INT_MAX - BN_BITS2 + 1))

crypto/bn/bn_lcl.h:668:12: Call
          666.           return a;
          667.   
          668.       return bn_expand2((a),(bits+BN_BITS2-1)/BN_BITS2);
                            ^
          669.   }
          670.   

crypto/bn/bn_lib.c:245:1: Parameter `*b->d`
            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 `*b->d`
              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:232:9: Array access: Offset added: [8, +oo] Size: [0, 536870848] by call to `BN_pseudo_rand` 
              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 int group_field_tests(const EC_GROUP *group, BN_CTX *ctx)\n{\n    BIGNUM *a = NULL, *b = NULL, *c = NULL;\n    int ret = 0;\n    if (group->meth->field_inv == NULL || group->meth->field_mul == NULL)\n        return 1;\n    BN_CTX_start(ctx);\n    a = BN_CTX_get(ctx);\n    b = BN_CTX_get(ctx);\n    if (!TEST_ptr(c = BN_CTX_get(ctx))\n        || !TEST_true(group->meth->field_inv(group, b, BN_value_one(), ctx))\n        || !TEST_true(BN_is_one(b))\n        || !TEST_true(BN_pseudo_rand(a, BN_num_bits(group->field) - 1,\n                                     BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY))\n        || !TEST_true(group->meth->field_inv(group, b, a, ctx))\n        || (group->meth->field_encode &&\n            !TEST_true(group->meth->field_encode(group, a, a, ctx)))\n        || (group->meth->field_encode &&\n            !TEST_true(group->meth->field_encode(group, b, b, ctx)))\n        || !TEST_true(group->meth->field_mul(group, c, a, b, ctx))\n        || (group->meth->field_decode &&\n            !TEST_true(group->meth->field_decode(group, c, c, ctx)))\n        || !TEST_true(BN_is_one(c)))\n        goto err;\n    BN_zero(a);\n    if (!TEST_false(group->meth->field_inv(group, b, a, ctx))\n        || !TEST_true(ERR_GET_LIB(ERR_peek_last_error()) == ERR_LIB_EC)\n        || !TEST_true(ERR_GET_REASON(ERR_peek_last_error()) ==\n                      EC_R_CANNOT_INVERT)\n        || !TEST_false(group->meth->field_inv(group, b, group->field, ctx))\n        || !TEST_true(ERR_GET_LIB(ERR_peek_last_error()) == ERR_LIB_EC)\n        || !TEST_true(ERR_GET_REASON(ERR_peek_last_error()) ==\n                      EC_R_CANNOT_INVERT))\n        goto err;\n    ERR_clear_error();\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    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_pseudo_rand(BIGNUM *rnd, int bits, int top, int bottom)\n{\n    return BN_rand(rnd, bits, top, bottom);\n}', 'int BN_rand(BIGNUM *rnd, int bits, int top, int bottom)\n{\n    return bnrand(NORMAL, rnd, bits, top, bottom);\n}', 'static int bnrand(BNRAND_FLAG flag, BIGNUM *rnd, int bits, int top, int bottom)\n{\n    unsigned char *buf = NULL;\n    int b, ret = 0, bit, bytes, mask;\n    if (bits == 0) {\n        if (top != BN_RAND_TOP_ANY || bottom != BN_RAND_BOTTOM_ANY)\n            goto toosmall;\n        BN_zero(rnd);\n        return 1;\n    }\n    if (bits < 0 || (bits == 1 && top > 0))\n        goto toosmall;\n    bytes = (bits + 7) / 8;\n    bit = (bits - 1) % 8;\n    mask = 0xff << (bit + 1);\n    buf = OPENSSL_malloc(bytes);\n    if (buf == NULL) {\n        BNerr(BN_F_BNRAND, ERR_R_MALLOC_FAILURE);\n        goto err;\n    }\n    b = flag == NORMAL ? RAND_bytes(buf, bytes) : RAND_priv_bytes(buf, bytes);\n    if (b <= 0)\n        goto err;\n    if (flag == TESTING) {\n        int i;\n        unsigned char c;\n        for (i = 0; i < bytes; i++) {\n            if (RAND_bytes(&c, 1) <= 0)\n                goto err;\n            if (c >= 128 && i > 0)\n                buf[i] = buf[i - 1];\n            else if (c < 42)\n                buf[i] = 0;\n            else if (c < 84)\n                buf[i] = 255;\n        }\n    }\n    if (top >= 0) {\n        if (top) {\n            if (bit == 0) {\n                buf[0] = 1;\n                buf[1] |= 0x80;\n            } else {\n                buf[0] |= (3 << (bit - 1));\n            }\n        } else {\n            buf[0] |= (1 << bit);\n        }\n    }\n    buf[0] &= ~mask;\n    if (bottom)\n        buf[bytes - 1] |= 1;\n    if (!BN_bin2bn(buf, bytes, rnd))\n        goto err;\n    ret = 1;\n err:\n    OPENSSL_clear_free(buf, bytes);\n    bn_check_top(rnd);\n    return ret;\ntoosmall:\n    BNerr(BN_F_BNRAND, BN_R_BITS_TOO_SMALL);\n    return 0;\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    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}']