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avcodec/h264_refs: Also check reference in ff_h264_build_ref_list()

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Fixes: out of array read
Fixes: 15409/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_fuzzer-5758846959616000

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 7d3581e6bb)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2019-06-30 22:19:22 +02:00
parent 8f1eb713c6
commit 9b75fd8607
1 changed files with 4 additions and 2 deletions
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6
libavcodec/h264_refs.c
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@@ -373,9 +373,11 @@ int ff_h264_build_ref_list(H264Context *h, H264SliceContext *sl)
av_assert0(0);
}
if (i < 0) {
if (i < 0 || mismatches_ref(h, ref)) {
av_log(h->avctx, AV_LOG_ERROR,
"reference picture missing during reorder\n");
i < 0 ? "reference picture missing during reorder\n" :
"mismatching reference\n"
);
memset(&sl->ref_list[list][index], 0, sizeof(sl->ref_list[0][0])); // FIXME
} else {
for (i = index; i + 1 < sl->ref_count[list]; i++) {