r9935: Make it easier to find overruns.

Jeremy.
(This used to be commit e68872d1473ea0557fac1072055a6ed21e5b3d82)

diff --git a/source3/rpc_parse/parse_prs.c b/source3/rpc_parse/parse_prs.c
index 493536eb2a2e70b6e1fecc3e4c1ec0f5504382b9..709a5d39af6c3f78178c45baebd0a5727adfe662 100644 (file)
--- a/source3/rpc_parse/parse_prs.c
+++ b/source3/rpc_parse/parse_prs.c
@@ -529,8 +529,10 @@ char *prs_mem_get(prs_struct *ps, uint32 extra_size)
                 * If reading, ensure that we can read the requested size item.
                 */
                if (ps->data_offset + extra_size > ps->buffer_size) {
-                       DEBUG(0,("prs_mem_get: reading data of size %u would overrun buffer.\n",
-                                       (unsigned int)extra_size ));
+                       DEBUG(0,("prs_mem_get: reading data of size %u would overrun "
+                               "buffer by %u bytes.\n",
+                               (unsigned int)extra_size,
+                               (unsigned int)(ps->data_offset + extra_size - ps->buffer_size) ));
                        return NULL;
                }
        } else {