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avformat/demux: Use unsigned to check duration vs duration_text 

Fixes: signed integer overflow: 9223371898743775808 - -138111000000 cannot be represented in type 'long'
Fixes: 46245/clusterfuzz-testcase-minimized-ffmpeg_dem_OGG_fuzzer-5075129786302464

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-04-11 21:52:55 +02:00
parent 83e1a1de88
commit 6007d5688c
1 changed files with 1 additions and 1 deletions
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libavformat/demux.c
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@ -1612,7 +1612,7 @@ static void update_stream_timings(AVFormatContext *ic)
else if (end_time < end_time_text) else if (end_time < end_time_text)
av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream endtime %f\n", end_time_text / (float)AV_TIME_BASE); av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream endtime %f\n", end_time_text / (float)AV_TIME_BASE);
if (duration == INT64_MIN || (duration < duration_text && duration_text - duration < AV_TIME_BASE)) if (duration == INT64_MIN || (duration < duration_text && (uint64_t)duration_text - duration < AV_TIME_BASE))
duration = duration_text; duration = duration_text;
else if (duration < duration_text) else if (duration < duration_text)
av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream duration %f\n", duration_text / (float)AV_TIME_BASE); av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream duration %f\n", duration_text / (float)AV_TIME_BASE);