fix CVE-2021-44648

(cherry picked from commit a1ef744fc48c49252a242be5f8f955b61905f976)

backport-CVE-2021-44648.patch

@@ -0,0 +1,40 @@
+From 19ebba03117aefc9d0312f675f3a210ffdcc4907 Mon Sep 17 00:00:00 2001
+From: Robert Ancell <Robert Ancell @robert.ancell>
+Date: Tue, 24 May 2022 14:36:15 +0800
+Subject: [PATCH] Fix overflow when reading GIF images with invalid LZW initial code size.
+ 
+Conflict:NA
+Reference:https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/merge_requests/130/diffs?commit_id=19ebba03117aefc9d0312f675f3a210ffdcc4907
+---
+ gdk-pixbuf/io-gif.c | 2 +-
+ gdk-pixbuf/lzw.c    | 2 ++
+ 2 files changed, 3 insertions(+), 1 deletion(-)
+ 
+diff --git a/gdk-pixbuf/io-gif.c b/gdk-pixbuf/io-gif.c
+index 1befba1..3d2a7a9 100644
+--- a/gdk-pixbuf/io-gif.c
++++ b/gdk-pixbuf/io-gif.c
+@@ -500,7 +500,7 @@ gif_prepare_lzw (GifContext *context)
+ 		return -1;
+ 	}
+         
+-        if (context->lzw_set_code_size > 12) {
++        if (context->lzw_set_code_size >= 12) {
+                 g_set_error_literal (context->error,
+                                      GDK_PIXBUF_ERROR,
+                                      GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
+diff --git a/gdk-pixbuf/lzw.c b/gdk-pixbuf/lzw.c
+index 105daf2..f3fae17 100644
+--- a/gdk-pixbuf/lzw.c
++++ b/gdk-pixbuf/lzw.c
+@@ -121,6 +121,8 @@ lzw_decoder_new (guint8 code_size)
+         LZWDecoder *self;
+         int i;
+ 
++        g_return_val_if_fail (code_size <= LZW_CODE_MAX, NULL);
++
+         self = g_object_new (lzw_decoder_get_type (), NULL);
+ 
+         self->min_code_size = code_size;
+-- 
+2.27.0

gdk-pixbuf2.spec

@@ -2,13 +2,15 @@
 
 Name:           gdk-pixbuf2
 Version:        2.42.6
-Release:        4
+Release:        5
 Summary:        gdk is a multi-platform toolkit for creating graphical user interfaces.
 License:        LGPLv2+
 URL:            https://gitlab.gnome.org/GNOME/gdk-pixbuf
 Source0:        https://download-fallback.gnome.org/sources/gdk-pixbuf/2.42/gdk-pixbuf-%{version}.tar.xz
+Source1:        invalid-colors.gif
 
 Patch6000:	backport-CVE-2021-46829.patch
+Patch6001:	backport-CVE-2021-44648.patch
 
 BuildRequires:  docbook-style-xsl
 BuildRequires:  gettext
@@ -65,6 +67,7 @@ developing applications that uses gdk-pixbuf2 xlib and test.
 
 %prep
 %autosetup -n gdk-pixbuf-%{version} -p1
+cp %{SOURCE1} ./tests/test-images/gif-test-suite/invalid-colors.gif
 
 %build
 %meson \
@@ -130,6 +133,9 @@ gdk-pixbuf-query-loaders-%{__isa_bits} --update-cache
 %{_mandir}/man1/gdk-pixbuf-csource.1*
 
 %changelog
+* Tue Jun 20 2023 zhangpan <zhangpan103@h-partners.com> - 2.42.6-5
+- fix CVE-2021-44648
+
 * Thu Aug 25 2022 wangkerong <wangkerong@h-partners.com> - 2.42.6-4
 - fix CVE-2021-46829