gdk-pixbuf: Fix CVE-2025-6199

Backport the fix for CVE-2025-6199
Add below patch to fix
CVE-2025-6199.patch

Reference: In Ubuntu and debian, fixed patch is given -> [c4986342b2]

(From OE-Core rev: de8c5d9964086e960e6df1f58a6d675fdb761286)

Signed-off-by: Shaik Moin <moins@kpit.com>
[YC: Link to Debian security tracker: https://security-tracker.debian.org/tracker/CVE-2025-6199 ]
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Paul Barker <paul@pbarker.dev>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-gnome/gdk-pixbuf/gdk-pixbuf/CVE-2025-6199.patch

@@ -0,0 +1,36 @@
+From 140200be0b4d5355aab76a6fd474e17d117045ca Mon Sep 17 00:00:00 2001
+From: lumi <lumi@suwi.moe>
+Date: Sat, 7 Jun 2025 22:27:06 +0200
+Subject: [PATCH] lzw: Fix reporting of bytes written in decoder
+
+When the LZW decoder encounters an invalid code, it stops
+processing the image and returns the whole buffer size.
+It should return the amount of bytes written, instead.
+
+Fixes #257
+
+CVE: CVE-2025-6199
+
+Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/commit/c4986342b241cdc075259565f3fa7a7597d32a32]
+
+Signed-off-by: Shaik Moin <moins@kpit.com>
+---
+ gdk-pixbuf/lzw.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/gdk-pixbuf/lzw.c b/gdk-pixbuf/lzw.c
+index 15293560b..4f3dd8beb 100644
+--- a/gdk-pixbuf/lzw.c
++++ b/gdk-pixbuf/lzw.c
+@@ -208,7 +208,7 @@ lzw_decoder_feed (LZWDecoder *self,
+                                 /* Invalid code received - just stop here */
+                                 if (self->code >= self->code_table_size) {
+                                         self->last_code = self->eoi_code;
+-                                        return output_length;
++                                        return n_written;
+                                 }
+ 
+                                 /* Convert codeword into indexes */
+-- 
+2.34.1
+

meta/recipes-gnome/gdk-pixbuf/gdk-pixbuf_2.42.12.bb

@@ -21,6 +21,7 @@ SRC_URI = "${GNOME_MIRROR}/${BPN}/${MAJ_VER}/${BPN}-${PV}.tar.xz \
            file://fatal-loader.patch \
            file://0001-meson.build-allow-a-subset-of-tests-in-cross-compile.patch \
            file://CVE-2025-7345.patch \
+           file://CVE-2025-6199.patch \
            "
 
 SRC_URI[sha256sum] = "b9505b3445b9a7e48ced34760c3bcb73e966df3ac94c95a148cb669ab748e3c7"