[FFmpeg-cvslog] avcodec/sgirledec: Check input length

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sun Sep 22 22:56:48 2024 +0200| [5f471b500c4f9f37a902266616644dd1496b022b] | committer: Michael Niedermayer

avcodec/sgirledec: Check input length

Fixes: Timeout
Fixes: 71712/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SGIRLE_fuzzer-5763700835811328

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=5f471b500c4f9f37a902266616644dd1496b022b
---

 libavcodec/sgirledec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/sgirledec.c b/libavcodec/sgirledec.c
index 3ce72eccb8..3bd31b7347 100644
--- a/libavcodec/sgirledec.c
+++ b/libavcodec/sgirledec.c
@@ -115,6 +115,9 @@ static int sgirle_decode_frame(AVCodecContext *avctx, AVFrame *frame,
 {
     int ret;
 
+    if (avpkt->size * 192ll / 2 < avctx->width * avctx->height)
+        return AVERROR_INVALIDDATA;
+
     if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
         return ret;