[FFmpeg-cvslog] avcodec/h264_slice: Fix integer overflow in implicit_weight_table()
Michael Niedermayer
git at videolan.org
Thu Mar 28 18:33:33 EET 2019
ffmpeg | branch: release/3.4 | Michael Niedermayer <michael at niedermayer.cc> | Fri Jan 4 20:00:38 2019 +0100| [84ef2bba6c513d5a461a484ee0d141264e2f4882] | committer: Michael Niedermayer
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 at niedermayer.cc>
(cherry picked from commit 77e56d74f972537aecd5bc2c5c4111e1d6ad0963)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=84ef2bba6c513d5a461a484ee0d141264e2f4882
---
libavcodec/h264_slice.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index f55cdf51f9..c9c475d73c 100644
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -672,7 +672,7 @@ static void implicit_weight_table(const H264Context *h, H264SliceContext *sl, in
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) &&
- 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_chroma = 0;
return;
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