[FFmpeg-devel] [PATCH 2/2] avcodec/cbs_jpeg_syntax_template: Check array index in huffman_table()

[Michael Niedermayer]

Fixes: index 224 out of bounds for type 'uint8_t [224]'
Fixes: 21534/clusterfuzz-testcase-minimized-ffmpeg_BSF_TRACE_HEADERS_fuzzer-6291612167831552

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 libavcodec/cbs_jpeg_syntax_template.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/cbs_jpeg_syntax_template.c b/libavcodec/cbs_jpeg_syntax_template.c
index 1ffb77d231..6eda56d623 100644
--- a/libavcodec/cbs_jpeg_syntax_template.c
+++ b/libavcodec/cbs_jpeg_syntax_template.c
@@ -89,6 +89,8 @@ static int FUNC(huffman_table)(CodedBitstreamContext *ctx, RWContext *rw,
     ij = 0;
     for (i = 0; i < 16; i++) {
         for (j = 0; j < current->L[i]; j++) {
+            if (ij >= 224)
+                return AVERROR_INVALIDDATA;
             us(8, V[ij], ij, 0, 255);
             ++ij;
         }
-- 
2.17.1