[FFmpeg-devel] [PATCH 3/6] avcodec/rv60dec: Check qp for intra

[Michael Niedermayer]

The rv60_qp_to_idx table only supports qp up to 31 on intra

Fixes: global-buffer-overflow
Fixes: 377543818/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RV60_fuzzer-5160167345291264

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/rv60dec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/rv60dec.c b/libavcodec/rv60dec.c
index 64fa72d8f20..449650223d8 100644
--- a/libavcodec/rv60dec.c
+++ b/libavcodec/rv60dec.c
@@ -1779,6 +1779,8 @@ static int decode_cu_r(RV60Context * s, AVFrame * frame, ThreadContext * thread,
         ttype = cu.pu_type == PU_FULL ? TRANSFORM_8X8 : TRANSFORM_4X4;
 
     is_intra = cu.cu_type == CU_INTRA;
+    if (is_intra && qp >= 32)
+        return AVERROR_INVALIDDATA;
     cu_pos = ((xpos & 63) >> 3) + ((ypos & 63) >> 3) * 8;
 
     switch (ttype) {
-- 
2.47.0