test/bntest.c:1782: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_asc2bn`.
Showing all 25 steps of the trace


test/bntest.c:1807:15: Call
1805.           }
1806.   
1807.           bn2 = BN_mpi2bn(scratch, mpi_len, NULL);
                      ^
1808.           if (bn2 == NULL) {
1809.               fprintf(stderr, "MPI test #%u: failed to parse\n",

crypto/bn/bn_mpi.c:69:9: Assignment
  67.       if (len == 0) {
  68.           a->neg = 0;
  69.           a->top = 0;
                ^
  70.           return a;
  71.       }

test/bntest.c:1782:14: Call
1780.   
1781.       for ( ; --i >= 0; test++) {
1782.           if (!BN_asc2bn(&bn, test->base10)) {
                     ^
1783.               fprintf(stderr, "Can't convert %s\n", test->base10);
1784.               goto err;

crypto/bn/bn_print.c:269:1: Parameter `(*bn)->top`
  267.   }
  268.   
  269. > int BN_asc2bn(BIGNUM **bn, const char *a)
  270.   {
  271.       const char *p = a;

crypto/bn/bn_print.c:277:14: Call
  275.   
  276.       if (p[0] == '0' && (p[1] == 'X' || p[1] == 'x')) {
  277.           if (!BN_hex2bn(bn, p + 2))
                      ^
  278.               return 0;
  279.       } else {

crypto/bn/bn_print.c:126:1: Parameter `(*bn)->top`
    124.   }
    125.   
    126. > int BN_hex2bn(BIGNUM **bn, const char *a)
    127.   {
    128.       BIGNUM *ret = NULL;

crypto/bn/bn_print.c:157:9: Call
    155.       } else {
    156.           ret = *bn;
    157.           BN_zero(ret);
                   ^
    158.       }
    159.   

crypto/bn/bn_lib.c:395:1: Parameter `a->top`
      393.   }
      394.   
      395. > int BN_set_word(BIGNUM *a, BN_ULONG w)
      396.   {
      397.       bn_check_top(a);

crypto/bn/bn_lib.c:398:9: Call
      396.   {
      397.       bn_check_top(a);
      398.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                     ^
      399.           return (0);
      400.       a->neg = 0;

crypto/bn/bn_lcl.h:660:1: Parameter `a->top`
        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:284:1: Parameter `b->top`
          282.    */
          283.   
          284. > BIGNUM *bn_expand2(BIGNUM *b, int words)
          285.   {
          286.       bn_check_top(b);

crypto/bn/bn_lib.c:289:23: Call
          287.   
          288.       if (words > b->dmax) {
          289.           BN_ULONG *a = bn_expand_internal(b, words);
                                       ^
          290.           if (!a)
          291.               return NULL;

crypto/bn/bn_lib.c:246:1: <Offset trace>
244.   /* This is used by bn_expand2() */
245.   /* The caller MUST check that words > b->dmax before calling this */
246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
247.   {
248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:246:1: Parameter `b->top`
            244.   /* This is used by bn_expand2() */
            245.   /* The caller MUST check that words > b->dmax before calling this */
            246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
            247.   {
            248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:246:1: <Length trace>
244.   /* This is used by bn_expand2() */
245.   /* The caller MUST check that words > b->dmax before calling this */
246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
247.   {
248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:246:1: Parameter `words`
            244.   /* This is used by bn_expand2() */
            245.   /* The caller MUST check that words > b->dmax before calling this */
            246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
            247.   {
            248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:263:13: Call
            261.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
            262.       else
            263.           a = OPENSSL_zalloc(words * sizeof(*a));
                               ^
            264.       if (a == NULL) {
            265.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

crypto/mem.c:186:1: Parameter `num`
              184.   }
              185.   
              186. > void *CRYPTO_zalloc(size_t num, const char *file, int line)
              187.   {
              188.       void *ret = CRYPTO_malloc(num, file, line);

crypto/mem.c:188:17: Call
              186.   void *CRYPTO_zalloc(size_t num, const char *file, int line)
              187.   {
              188.       void *ret = CRYPTO_malloc(num, file, line);
                                     ^
              189.   
              190.       FAILTEST();

crypto/mem.c:166:9: Assignment
                164.   
                165.       if (num == 0)
                166.           return NULL;
                               ^
                167.   
                168.       FAILTEST();

crypto/mem.c:188:5: Assignment
              186.   void *CRYPTO_zalloc(size_t num, const char *file, int line)
              187.   {
              188.       void *ret = CRYPTO_malloc(num, file, line);
                         ^
              189.   
              190.       FAILTEST();

crypto/mem.c:193:5: Assignment
              191.       if (ret != NULL)
              192.           memset(ret, 0, num);
              193.       return ret;
                         ^
              194.   }
              195.   

crypto/bn/bn_lib.c:263:9: Assignment
            261.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
            262.       else
            263.           a = OPENSSL_zalloc(words * sizeof(*a));
                           ^
            264.       if (a == NULL) {
            265.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

crypto/bn/bn_lib.c:271:9: Array access: Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_asc2bn` 
            269.       assert(b->top <= words);
            270.       if (b->top > 0)
            271.           memcpy(a, b->d, sizeof(*a) * b->top);
                           ^
            272.   
            273.       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 test_mpi()\n{\n    uint8_t scratch[8];\n    int i = (int)sizeof(kMPITests) / sizeof(kMPITests[0]);\n    const MPITEST *test = kMPITests;\n    size_t mpi_len, mpi_len2;\n    BIGNUM *bn = BN_new();\n    BIGNUM *bn2 = NULL;\n    int st = 0;\n    for ( ; --i >= 0; test++) {\n        if (!BN_asc2bn(&bn, test->base10)) {\n            fprintf(stderr, "Can\'t convert %s\\n", test->base10);\n            goto err;\n        }\n        mpi_len = BN_bn2mpi(bn, NULL);\n        if (mpi_len > sizeof (scratch)) {\n            fprintf(stderr,\n                    "MPI test #%u: MPI size is too large to test.\\n",\n                    (unsigned)i);\n            goto err;\n        }\n        mpi_len2 = BN_bn2mpi(bn, scratch);\n        if (mpi_len != mpi_len2) {\n            fprintf(stderr, "MPI test #%u: length changes.\\n",\n                    (unsigned)i);\n            goto err;\n        }\n        if (mpi_len != test->mpi_len\n                || memcmp(test->mpi, scratch, mpi_len) != 0) {\n            fprintf(stderr, "MPI test #%u failed:\\n", (unsigned)i);\n            goto err;\n        }\n        bn2 = BN_mpi2bn(scratch, mpi_len, NULL);\n        if (bn2 == NULL) {\n            fprintf(stderr, "MPI test #%u: failed to parse\\n",\n                    (unsigned)i);\n            goto err;\n        }\n        if (BN_cmp(bn, bn2) != 0) {\n            fprintf(stderr, "MPI test #%u: wrong result\\n",\n                    (unsigned)i);\n            BN_free(bn2);\n            goto err;\n        }\n        BN_free(bn2);\n    }\n    st = 1;\nerr:\n    BN_free(bn);\n    return st;\n}', 'BIGNUM *BN_mpi2bn(const unsigned char *d, int n, BIGNUM *ain)\n{\n    long len;\n    int neg = 0;\n    BIGNUM *a = NULL;\n    if (n < 4) {\n        BNerr(BN_F_BN_MPI2BN, BN_R_INVALID_LENGTH);\n        return NULL;\n    }\n    len = ((long)d[0] << 24) | ((long)d[1] << 16) | ((int)d[2] << 8) | (int)\n        d[3];\n    if ((len + 4) != n) {\n        BNerr(BN_F_BN_MPI2BN, BN_R_ENCODING_ERROR);\n        return NULL;\n    }\n    if (ain == NULL)\n        a = BN_new();\n    else\n        a = ain;\n    if (a == NULL)\n        return NULL;\n    if (len == 0) {\n        a->neg = 0;\n        a->top = 0;\n        return a;\n    }\n    d += 4;\n    if ((*d) & 0x80)\n        neg = 1;\n    if (BN_bin2bn(d, (int)len, a) == NULL) {\n        if (ain == NULL)\n            BN_free(a);\n        return NULL;\n    }\n    a->neg = neg;\n    if (neg) {\n        BN_clear_bit(a, BN_num_bits(a) - 1);\n    }\n    bn_check_top(a);\n    return a;\n}', "int BN_asc2bn(BIGNUM **bn, const char *a)\n{\n    const char *p = a;\n    if (*p == '-')\n        p++;\n    if (p[0] == '0' && (p[1] == 'X' || p[1] == 'x')) {\n        if (!BN_hex2bn(bn, p + 2))\n            return 0;\n    } else {\n        if (!BN_dec2bn(bn, p))\n            return 0;\n    }\n    if (*a == '-' && (*bn)->top != 0)\n        (*bn)->neg = 1;\n    return 1;\n}", "int BN_hex2bn(BIGNUM **bn, const char *a)\n{\n    BIGNUM *ret = NULL;\n    BN_ULONG l = 0;\n    int neg = 0, h, m, i, j, k, c;\n    int num;\n    if ((a == NULL) || (*a == '\\0'))\n        return (0);\n    if (*a == '-') {\n        neg = 1;\n        a++;\n    }\n    for (i = 0; i <= (INT_MAX/4) && isxdigit((unsigned char)a[i]); i++)\n        continue;\n    if (i == 0 || i > INT_MAX/4)\n        goto err;\n    num = i + neg;\n    if (bn == NULL)\n        return (num);\n    if (*bn == NULL) {\n        if ((ret = BN_new()) == NULL)\n            return (0);\n    } else {\n        ret = *bn;\n        BN_zero(ret);\n    }\n    if (bn_expand(ret, i * 4) == NULL)\n        goto err;\n    j = i;\n    m = 0;\n    h = 0;\n    while (j > 0) {\n        m = ((BN_BYTES * 2) <= j) ? (BN_BYTES * 2) : j;\n        l = 0;\n        for (;;) {\n            c = a[j - m];\n            k = OPENSSL_hexchar2int(c);\n            if (k < 0)\n                k = 0;\n            l = (l << 4) | k;\n            if (--m <= 0) {\n                ret->d[h++] = l;\n                break;\n            }\n        }\n        j -= (BN_BYTES * 2);\n    }\n    ret->top = h;\n    bn_correct_top(ret);\n    *bn = ret;\n    bn_check_top(ret);\n    if (ret->top != 0)\n        ret->neg = neg;\n    return (num);\n err:\n    if (*bn == NULL)\n        BN_free(ret);\n    return (0);\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}', '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    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    allow_customize = 0;\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    osslargused(file); osslargused(line);\n    ret = malloc(num);\n#endif\n    return ret;\n}']