diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-05-25 23:40:18 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-06-18 14:29:13 +0200 |
| commit | a0f4d4e65093a4cb627f05d09b19c922e88cfac1 (patch) | |
| tree | c8ffeedbc75e89d3d93020a0719acb41c70017f0 | |
| parent | ff8a496d41422b694f66684ada97dcf49e167782 (diff) | |
| download | ffmpeg-a0f4d4e65093a4cb627f05d09b19c922e88cfac1.tar.gz | |
avcodec/hevcdec: Avoid null pointer dereferences in MC
Fixes: runtime error: pointer index expression with base 0x000000000000 overflowed to 0xfffffffffffffff8
Fixes: 58440/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-5956015530311680
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/hevcdec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/hevcdec.c b/libavcodec/hevcdec.c index a4284921cb..fcf19b4eb6 100644 --- a/libavcodec/hevcdec.c +++ b/libavcodec/hevcdec.c @@ -1960,13 +1960,13 @@ static void hls_prediction_unit(HEVCLocalContext *lc, int x0, int y0, if (current_mv.pred_flag & PF_L0) { ref0 = refPicList[0].ref[current_mv.ref_idx[0]]; - if (!ref0) + if (!ref0 || !ref0->frame->data[0]) return; hevc_await_progress(s, ref0, ¤t_mv.mv[0], y0, nPbH); } if (current_mv.pred_flag & PF_L1) { ref1 = refPicList[1].ref[current_mv.ref_idx[1]]; - if (!ref1) + if (!ref1 || !ref1->frame->data[0]) return; hevc_await_progress(s, ref1, ¤t_mv.mv[1], y0, nPbH); } |