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avformat/flvdec: timestamps cannot use the full int64 range

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We do not support this as we multiply by 1000
Fixes: signed integer overflow: -45318575073853696 * 1000 cannot be represented in type 'long'
Fixes: 42804/clusterfuzz-testcase-minimized-ffmpeg_dem_LIVE_FLV_fuzzer-4630325425209344

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 c217ca7718c8e24905d7ba9ede719ae040899476)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-12-23 20:36:16 +01:00
parent 807a564acf
commit 83778e7787
1 changed files with 2 additions and 0 deletions
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libavformat/flvdec.c
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@ -432,6 +432,8 @@ static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, int64_t m
d = av_int2double(avio_rb64(ioc)); d = av_int2double(avio_rb64(ioc));
if (isnan(d) || d < INT64_MIN || d > INT64_MAX) if (isnan(d) || d < INT64_MIN || d > INT64_MAX)
goto invalid; goto invalid;
if (current_array == &times && (d <= INT64_MIN / 1000 || d >= INT64_MAX / 1000))
goto invalid;
current_array[0][i] = d; current_array[0][i] = d;
} }
if (times && filepositions) { if (times && filepositions) {