From: Luca Bacci <luca.bacci982@gmail.com>
Date: Wed, 19 Jul 2023 14:19:28 +0000 (+0200)
Subject: Add check for large compose files
X-Git-Tag: archive/raspbian/4.12.3+ds-1+rpi1~1^2^2^2~22^2~1^2~57^2~2
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=add197bcf72118d599b13adee8088e745a97bd88;p=gtk4.git

Add check for large compose files

Fixes #4990
---

diff --git a/gtk/gtkcomposetable.c b/gtk/gtkcomposetable.c
index f999ddbc26..b8842d9731 100644
--- a/gtk/gtkcomposetable.c
+++ b/gtk/gtkcomposetable.c
@@ -980,6 +980,7 @@ parser_get_compose_table (GtkComposeParser *parser)
           current_first = (guint16)sequence[0];
 
           data[first_pos] = (guint16)sequence[0];
+
           for (i = 1; i < index_rowstride; i++)
             data[first_pos + i] = rest_pos;
         }
@@ -998,6 +999,14 @@ parser_get_compose_table (GtkComposeParser *parser)
 
       rest_pos += len;
 
+      if (rest_pos >= 0x8000)
+        {
+          g_warning ("GTK can't handle compose tables this large (%s)", parser->compose_file ? parser->compose_file : "");
+          g_free (data);
+          g_string_free (char_data, TRUE);
+          return NULL;
+        }
+
       for (i = len + 1; i < index_rowstride; i++)
         data[first_pos + i] = rest_pos;