test/ec_internal_test.c:36: error: BUFFER_OVERRUN_L3
  Offset: [-1, +oo] Size: [1, +oo] by call to `BN_pseudo_rand`.
Showing all 16 steps of the trace


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_lib.c:141:9: Assignment
  139.   
  140.       if (BN_is_zero(a))
  141.           return 0;
                 ^
  142.       return ((i * BN_BITS2) + BN_num_bits_word(a->d[i]));
  143.   }

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 `bits`
  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 `bits`
    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:57:14: <Offset trace>
55.           unsigned char c;
56.   
57.           for (i = 0; i < bytes; i++) {
                   ^
58.               if (RAND_bytes(&c, 1) <= 0)
59.                   goto err;

crypto/bn/bn_rand.c:57:14: Assignment
      55.           unsigned char c;
      56.   
      57.           for (i = 0; i < bytes; i++) {
                         ^
      58.               if (RAND_bytes(&c, 1) <= 0)
      59.                   goto err;

crypto/bn/bn_rand.c:21:1: <Length trace>
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:21:1: Parameter `bits`
      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:35:5: Assignment
      33.           goto toosmall;
      34.   
      35.       bytes = (bits + 7) / 8;
                ^
      36.       bit = (bits - 1) % 8;
      37.       mask = 0xff << (bit + 1);

crypto/bn/bn_rand.c:39:11: Call
      37.       mask = 0xff << (bit + 1);
      38.   
      39.       buf = OPENSSL_malloc(bytes);
                      ^
      40.       if (buf == NULL) {
      41.           BNerr(BN_F_BNRAND, ERR_R_MALLOC_FAILURE);

crypto/mem.c:201:9: Assignment
        199.   
        200.       if (num == 0)
        201.           return NULL;
                       ^
        202.   
        203.       FAILTEST();

crypto/bn/bn_rand.c:39:5: Assignment
      37.       mask = 0xff << (bit + 1);
      38.   
      39.       buf = OPENSSL_malloc(bytes);
                ^
      40.       if (buf == NULL) {
      41.           BNerr(BN_F_BNRAND, ERR_R_MALLOC_FAILURE);

crypto/bn/bn_rand.c:83:9: Array access: Offset: [-1, +oo] Size: [1, +oo] by call to `BN_pseudo_rand` 
      81.       buf[0] &= ~mask;
      82.       if (bottom)                 /* set bottom bit if requested */
      83.           buf[bytes - 1] |= 1;
                    ^
      84.       if (!BN_bin2bn(buf, bytes, rnd))
      85.           goto err;

static int bnrand(BNRAND_FLAG flag, BIGNUM *rnd, int bits, int top, int bottom)
{
    unsigned char *buf = NULL;
    int b, ret = 0, bit, bytes, mask;
    if (bits == 0) {
        if (top != BN_RAND_TOP_ANY || bottom != BN_RAND_BOTTOM_ANY)
            goto toosmall;
        BN_zero(rnd);
        return 1;
    }
    if (bits < 0 || (bits == 1 && top > 0))
        goto toosmall;
    bytes = (bits + 7) / 8;
    bit = (bits - 1) % 8;
    mask = 0xff << (bit + 1);
    buf = OPENSSL_malloc(bytes);
    if (buf == NULL) {
        BNerr(BN_F_BNRAND, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    b = flag == NORMAL ? RAND_bytes(buf, bytes) : RAND_priv_bytes(buf, bytes);
    if (b <= 0)
        goto err;
    if (flag == TESTING) {
        int i;
        unsigned char c;
        for (i = 0; i < bytes; i++) {
            if (RAND_bytes(&c, 1) <= 0)
                goto err;
            if (c >= 128 && i > 0)
                buf[i] = buf[i - 1];
            else if (c < 42)
                buf[i] = 0;
            else if (c < 84)
                buf[i] = 255;
        }
    }
    if (top >= 0) {
        if (top) {
            if (bit == 0) {
                buf[0] = 1;
                buf[1] |= 0x80;
            } else {
                buf[0] |= (3 << (bit - 1));
            }
        } else {
            buf[0] |= (1 << bit);
        }
    }
    buf[0] &= ~mask;
    if (bottom)
        buf[bytes - 1] |= 1;
    if (!BN_bin2bn(buf, bytes, rnd))
        goto err;
    ret = 1;
 err:
    OPENSSL_clear_free(buf, bytes);
    bn_check_top(rnd);
    return ret;
toosmall:
    BNerr(BN_F_BNRAND, BN_R_BITS_TOO_SMALL);
    return 0;
}
['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}', 'int BN_num_bits(const BIGNUM *a)\n{\n    int i = a->top - 1;\n    bn_check_top(a);\n    if (BN_is_zero(a))\n        return 0;\n    return ((i * BN_BITS2) + BN_num_bits_word(a->d[i]));\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}', '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}']