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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-03-20 00:07:50 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-04-07 16:27:00 +0200 |
| commit | 7b9ee6a49e8b4441a92612dabe9d13b461741696 (patch) | |
| tree | 046eaaa741b53383944de352b4b8277149f1a3fe | |
| parent | 64a756b8f5abfb819674e6268321dae9d324df26 (diff) | |
| download | ffmpeg-7b9ee6a49e8b4441a92612dabe9d13b461741696.tar.gz | |
avformat/aqtitledec: Skip unrepresentable durations
Fixes: signed integer overflow: -5 - 9223372036854775807 cannot be represented in type 'long'
Fixes: 45665/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-475618463934054
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 c2d1597a8a6470045a8da241d4f65c81f26c3107)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/aqtitledec.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libavformat/aqtitledec.c b/libavformat/aqtitledec.c index 81630d73b0..960a5d8ef5 100644 --- a/libavformat/aqtitledec.c +++ b/libavformat/aqtitledec.c @@ -74,7 +74,8 @@ static int aqt_read_header(AVFormatContext *s) new_event = 1; pos = avio_tell(s->pb); if (sub) { - sub->duration = frame - sub->pts; + if (frame >= sub->pts && (uint64_t)frame - sub->pts < INT64_MAX) + sub->duration = frame - sub->pts; sub = NULL; } } else if (*line) { |