ffmpeg: fix CVE-2025-22921

FFmpeg git-master,N-113007-g8d24a28d06 was discovered to contain a segmentation
violation via the component /libavcodec/jpeg2000dec.c.

(From OE-Core rev: bc9cdf3701b937d40964903a3489898a69525d17)

Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2025-22921.patch

@@ -0,0 +1,34 @@
+From 7f9c7f9849a2155224711f0ff57ecdac6e4bfb57 Mon Sep 17 00:00:00 2001
+From: James Almer <jamrial@gmail.com>
+Date: Wed, 1 Jan 2025 23:58:39 -0300
+Subject: [PATCH] avcodec/jpeg2000dec: clear array length when freeing it
+
+Fixes NULL pointer dereferences.
+Fixes ticket #11393.
+
+Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
+Signed-off-by: James Almer <jamrial@gmail.com>
+
+CVE: CVE-2025-22921
+
+Upstream-Status: Backport [https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/7f9c7f9849a2155224711f0ff57ecdac6e4bfb57]
+
+Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
+---
+ libavcodec/jpeg2000dec.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c
+index 691cfbd..b56902c 100644
+--- a/libavcodec/jpeg2000dec.c
++++ b/libavcodec/jpeg2000dec.c
+@@ -1223,6 +1223,7 @@ static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
+                 }
+             }
+             av_freep(&cblk->lengthinc);
++            cblk->nb_lengthinc = 0;
+         }
+     }
+     // Save state of stream
+--
+2.40.0

meta/recipes-multimedia/ffmpeg/ffmpeg_6.1.1.bb

@@ -49,6 +49,7 @@ SRC_URI = " \
     file://CVE-2024-35369.patch \
     file://CVE-2025-25473.patch \
     file://CVE-2025-25471.patch \
+    file://CVE-2025-22921.patch \
 "
 
 SRC_URI[sha256sum] = "8684f4b00f94b85461884c3719382f1261f0d9eb3d59640a1f4ac0873616f968"