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avcodec/h264_slice: Fix integer overflow in implicit_weight_table() 

Fixes: signed integer overflow: 2 * 2132811760 cannot be represented in type 'int'
Fixes: 11156/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_fuzzer-6237685933408256

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 77e56d74f9)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-01-04 20:00:38 +01:00
parent 9239d58b36
commit c694273feb
1 changed files with 1 additions and 1 deletions
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2
libavcodec/h264_slice.c
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@ -678,7 +678,7 @@ static void implicit_weight_table(const H264Context *h, H264SliceContext *sl, in
cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure - 1]; cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure - 1];
} }
if (sl->ref_count[0] == 1 && sl->ref_count[1] == 1 && !FRAME_MBAFF(h) && if (sl->ref_count[0] == 1 && sl->ref_count[1] == 1 && !FRAME_MBAFF(h) &&
sl->ref_list[0][0].poc + (int64_t)sl->ref_list[1][0].poc == 2 * cur_poc) { sl->ref_list[0][0].poc + (int64_t)sl->ref_list[1][0].poc == 2LL * cur_poc) {
sl->pwt.use_weight = 0; sl->pwt.use_weight = 0;
sl->pwt.use_weight_chroma = 0; sl->pwt.use_weight_chroma = 0;
return; return;