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avcodec/h264_slice: Clear ref_counts on redundant slices

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Fixes reading freed memory
Fixes: 568/clusterfuzz-testcase-6107186067406848

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit c03029a835949fc0e68b4c6558ebcdc3ae137087)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-02-08 17:55:41 +01:00
parent ed2572b9c8
commit 63637e457c
1 changed files with 3 additions and 1 deletions
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4
libavcodec/h264_slice.c
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@ -1771,8 +1771,10 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl,
return ret;
// discard redundant pictures
if (sl->redundant_pic_count > 0)
if (sl->redundant_pic_count > 0) {
sl->ref_count[0] = sl->ref_count[1] = 0;
return 0;
}
if (sl->first_mb_addr == 0 || !h->current_slice) {
if (h->setup_finished) {