[Fix] Use memmove for overlapping regions

Issue: #961
MFH: true

diff --git a/src/libserver/html.c b/src/libserver/html.c
index b121006bbe5c059dda2a35cc9f7761182bb23568..af91ab39cff8dd44ffe9626a1238e72a37d3b49d 100644 (file)
--- a/src/libserver/html.c
+++ b/src/libserver/html.c
@@ -691,7 +691,7 @@ rspamd_html_decode_entitles_inplace (gchar *s, guint len)
                                                t += rep_len;
                                        }
                                        else {
-                                               memcpy (t, e, h - e);
+                                               memmove (t, e, h - e);
                                                t += h - e;
                                        }
                                }
@@ -713,7 +713,7 @@ rspamd_html_decode_entitles_inplace (gchar *s, guint len)
                                        }
                                        if (end_ptr != NULL && *end_ptr != '\0') {
                                                /* Skip undecoded */
-                                               memcpy (t, e, h - e);
+                                               memmove (t, e, h - e);
                                                t += h - e;
                                        }
                                        else {
@@ -736,7 +736,7 @@ rspamd_html_decode_entitles_inplace (gchar *s, guint len)
                                                                t += g_unichar_to_utf8 (val, t);
                                                        }
                                                        else {
-                                                               memcpy (t, e, h - e);
+                                                               memmove (t, e, h - e);
                                                                t += h - e;
                                                        }
                                                }