[FFmpeg-cvslog] avcodec/cfhd: Check idwt_buf size before allocation

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Tue Jul 15 22:19:24 2025 +0200| [2d72bf6fe0793c3f069ba181a0e733dcc9f28180] | committer: Michael Niedermayer

avcodec/cfhd: Check idwt_buf size before allocation

Fixes: OOM
Fixes: 428760799/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CFHD_DEC_fuzzer-5685176435015680

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2d72bf6fe0793c3f069ba181a0e733dcc9f28180
---

 libavcodec/cfhd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/cfhd.c b/libavcodec/cfhd.c
index 2044254c84..f110b91f0b 100644
--- a/libavcodec/cfhd.c
+++ b/libavcodec/cfhd.c
@@ -25,6 +25,7 @@
 
 #include "libavutil/attributes.h"
 #include "libavutil/common.h"
+#include "libavutil/imgutils.h"
 #include "libavutil/intreadwrite.h"
 #include "libavutil/mem.h"
 #include "libavutil/pixdesc.h"
@@ -266,6 +267,9 @@ static int alloc_buffers(AVCodecContext *avctx)
         int height = (i || bayer) ? s->coded_height >> chroma_y_shift : s->coded_height;
         ptrdiff_t stride = (FFALIGN(width  / 8, 8) + 64) * 8;
 
+        if ((ret = av_image_check_size2(stride, height, avctx->max_pixels, s->coded_format, 0, avctx)) < 0)
+            return ret;
+
         if (chroma_y_shift && !bayer)
             height = FFALIGN(height / 8, 2) * 8;
         s->plane[i].width  = width;