From 5eb05f44503da3fdff82f1fed8ee2706d9841a9a Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 27 Apr 2024 00:09:02 +0200 Subject: [PATCH] avcodec/hevcdec: Check ref frame Fixes: NULL pointer dereferences Fixes: 68197/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-6382538823106560 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Andreas Rheinhardt Signed-off-by: Michael Niedermayer --- libavcodec/hevcdec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/hevcdec.c b/libavcodec/hevcdec.c index fcfb275f63..b41dc46053 100644 --- a/libavcodec/hevcdec.c +++ b/libavcodec/hevcdec.c @@ -1969,13 +1969,13 @@ 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 || !ref0->frame->data[0]) + if (!ref0 || !ref0->frame) 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 || !ref1->frame->data[0]) + if (!ref1 || !ref1->frame) return; hevc_await_progress(s, ref1, ¤t_mv.mv[1], y0, nPbH); }