[FFmpeg-devel] [PATCH 01/10] libavcodec/cbs_apv_syntax_template: limit tile to 2gb

[Michael Niedermayer]

We do not support larger tiles as we use signed int
Alternatively we can check this in apv_decode_tile_component() or init_get_bits*()
or support bitstreams above 2gb length

Fixes: init_get_bits() failure later
Fixes: 421817631/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APV_fuzzer-4957386534354944

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_apv_syntax_template.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/cbs_apv_syntax_template.c b/libavcodec/cbs_apv_syntax_template.c
index fc8a08ff31d..6534236deef 100644
--- a/libavcodec/cbs_apv_syntax_template.c
+++ b/libavcodec/cbs_apv_syntax_template.c
@@ -261,7 +261,7 @@ static int FUNC(frame)(CodedBitstreamContext *ctx, RWContext *rw,
     CHECK(FUNC(frame_header)(ctx, rw, &current->frame_header));
 
     for (int t = 0; t < priv->tile_info.num_tiles; t++) {
-        us(32, tile_size[t], 10, MAX_UINT_BITS(32), 1, t);
+        us(32, tile_size[t], 10, MAX_INT_BITS(32), 1, t);
 
         CHECK(FUNC(tile)(ctx, rw, &current->tile[t],
                          t, current->tile_size[t]));
-- 
2.49.0