[FFmpeg-cvslog] avcodec/evc_ps: Check chroma_format_idc

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu Oct 12 23:58:18 2023 +0200| [ef3b42738b8081982498f5fb6b24593996045777] | committer: Michael Niedermayer

avcodec/evc_ps: Check chroma_format_idc

Fixes: out of array access
Fixes: 62678/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-4858264984354816

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ef3b42738b8081982498f5fb6b24593996045777
---

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

diff --git a/libavcodec/evc_ps.c b/libavcodec/evc_ps.c
index c11b92d1c5..19895d404d 100644
--- a/libavcodec/evc_ps.c
+++ b/libavcodec/evc_ps.c
@@ -179,6 +179,10 @@ int ff_evc_parse_sps(GetBitContext *gb, EVCParamSets *ps)
     // 2 - 4:2:2
     // 3 - 4:4:4
     sps->chroma_format_idc = get_ue_golomb_31(gb);
+    if (sps->chroma_format_idc > 3) {
+        ret = AVERROR_INVALIDDATA;
+        goto fail;
+    }
 
     sps->pic_width_in_luma_samples = get_ue_golomb_long(gb);
     sps->pic_height_in_luma_samples = get_ue_golomb_long(gb);