ssl/record/ssl3_record.c:649: error: INTEGER_OVERFLOW_L2
  ([0, +oo] - 1):unsigned64 by call to `ssl3_cbc_remove_padding`.
Showing all 5 steps of the trace


ssl/record/ssl3_record.c:578:1: Parameter `inrecs->length`
576.    *       occurred.
577.    */
578. > int ssl3_enc(SSL *s, SSL3_RECORD *inrecs, size_t n_recs, int send)
579.   {
580.       SSL3_RECORD *rec;

ssl/record/ssl3_record.c:649:20: Call
647.           }
648.           if ((bs != 1) && !send)
649.               return ssl3_cbc_remove_padding(rec, bs, mac_size);
                          ^
650.       }
651.       return (1);

ssl/record/ssl3_record.c:1111:1: <LHS trace>
1109.    *  -1: otherwise.
1110.    */
1111. > int ssl3_cbc_remove_padding(SSL3_RECORD *rec,
1112.                               size_t block_size, size_t mac_size)
1113.   {

ssl/record/ssl3_record.c:1111:1: Parameter `rec->length`
  1109.    *  -1: otherwise.
  1110.    */
  1111. > int ssl3_cbc_remove_padding(SSL3_RECORD *rec,
  1112.                               size_t block_size, size_t mac_size)
  1113.   {

ssl/record/ssl3_record.c:1124:22: Binary operation: ([0, +oo] - 1):unsigned64 by call to `ssl3_cbc_remove_padding` 
  1122.           return 0;
  1123.   
  1124.       padding_length = rec->data[rec->length - 1];
                               ^
  1125.       good = constant_time_ge_s(rec->length, padding_length + overhead);
  1126.       /* SSLv3 requires that the padding is minimal. */

int ssl3_cbc_remove_padding(SSL3_RECORD *rec,
                            size_t block_size, size_t mac_size)
{
    size_t padding_length;
    size_t good;
    const size_t overhead = 1    + mac_size;
    if (overhead > rec->length)
        return 0;
    padding_length = rec->data[rec->length - 1];
    good = constant_time_ge_s(rec->length, padding_length + overhead);
    good &= constant_time_ge_s(block_size, padding_length + 1);
    rec->length -= good & (padding_length + 1);
    return constant_time_select_int_s(good, 1, -1);
}
['int ssl3_enc(SSL *s, SSL3_RECORD *inrecs, size_t n_recs, int send)\n{\n    SSL3_RECORD *rec;\n    EVP_CIPHER_CTX *ds;\n    size_t l, i;\n    size_t bs, mac_size = 0;\n    int imac_size;\n    const EVP_CIPHER *enc;\n    rec = inrecs;\n    if (n_recs != 1)\n        return 0;\n    if (send) {\n        ds = s->enc_write_ctx;\n        if (s->enc_write_ctx == NULL)\n            enc = NULL;\n        else\n            enc = EVP_CIPHER_CTX_cipher(s->enc_write_ctx);\n    } else {\n        ds = s->enc_read_ctx;\n        if (s->enc_read_ctx == NULL)\n            enc = NULL;\n        else\n            enc = EVP_CIPHER_CTX_cipher(s->enc_read_ctx);\n    }\n    if ((s->session == NULL) || (ds == NULL) || (enc == NULL)) {\n        memmove(rec->data, rec->input, rec->length);\n        rec->input = rec->data;\n    } else {\n        l = rec->length;\n        bs = EVP_CIPHER_CTX_block_size(ds);\n        if ((bs != 1) && send) {\n            i = bs - (l % bs);\n            l += i;\n            memset(&rec->input[rec->length], 0, i);\n            rec->length += i;\n            rec->input[l - 1] = (unsigned char)(i - 1);\n        }\n        if (!send) {\n            if (l == 0 || l % bs != 0)\n                return 0;\n        }\n        if (EVP_Cipher(ds, rec->data, rec->input, (unsigned int)l) < 1)\n            return -1;\n        if (EVP_MD_CTX_md(s->read_hash) != NULL) {\n            imac_size = EVP_MD_CTX_size(s->read_hash);\n            if (imac_size < 0)\n                return -1;\n            mac_size = (size_t)imac_size;\n        }\n        if ((bs != 1) && !send)\n            return ssl3_cbc_remove_padding(rec, bs, mac_size);\n    }\n    return (1);\n}', 'int ssl3_cbc_remove_padding(SSL3_RECORD *rec,\n                            size_t block_size, size_t mac_size)\n{\n    size_t padding_length;\n    size_t good;\n    const size_t overhead = 1    + mac_size;\n    if (overhead > rec->length)\n        return 0;\n    padding_length = rec->data[rec->length - 1];\n    good = constant_time_ge_s(rec->length, padding_length + overhead);\n    good &= constant_time_ge_s(block_size, padding_length + 1);\n    rec->length -= good & (padding_length + 1);\n    return constant_time_select_int_s(good, 1, -1);\n}']