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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-04-18 22:39:30 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-06 14:41:41 +0200 |
| commit | 95f02cf7375bf0f4414ea43997dd5c0b8ee05bbd (patch) | |
| tree | d81994f398314e39ffe01625247f7ff1b9b3ca0d | |
| parent | 28c8271d21125c1882b82bde68d7318da64a78bf (diff) | |
| download | ffmpeg-95f02cf7375bf0f4414ea43997dd5c0b8ee05bbd.tar.gz | |
avformat/utils: check dts/duration to be representable before using them
Fixes: signed integer overflow: 6854513951393103890 + 3427256975738527712 cannot be represented in type 'long'
Fixes: 32936/clusterfuzz-testcase-minimized-ffmpeg_dem_R3D_fuzzer-5236914752978944
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 bf4e7ec8257fd24a12327c7fa14e322028250be4)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/utils.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavformat/utils.c b/libavformat/utils.c index 6fac7abafc..3302651af2 100644 --- a/libavformat/utils.c +++ b/libavformat/utils.c @@ -1219,7 +1219,9 @@ static void update_initial_durations(AVFormatContext *s, AVStream *st, (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts || pktl->pkt.dts == RELATIVE_TS_BASE) && - !pktl->pkt.duration) { + !pktl->pkt.duration && + av_sat_add64(cur_dts, duration) == cur_dts + (uint64_t)duration + ) { pktl->pkt.dts = cur_dts; if (!st->internal->avctx->has_b_frames) pktl->pkt.pts = cur_dts; |