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avformat/sbgdec: Check ts_int in genrate_intervals 

There is probably a better place to check for this, but better
here than nowhere

Fixes: signed integer overflow: -9223372036824775808 - 86400000000 cannot be represented in type 'long'
Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_SBG_fuzzer-6601162580688896

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-09-18 16:35:41 +02:00
parent 981f5e46af
commit 5f529e9147
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GPG Key ID: B18E8928B3948D64
1 changed files with 2 additions and 0 deletions
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libavformat/sbgdec.c
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@ -1317,6 +1317,8 @@ static int generate_intervals(void *log, struct sbg_script *s, int sample_rate,
/* Pseudo event before the first one */
ev0 = s->events[s->nb_events - 1];
if (av_sat_sub64(ev0.ts_int, period) != (uint64_t)ev0.ts_int - period)
return AVERROR_INVALIDDATA;
ev0.ts_int -= period;
ev0.ts_trans -= period;
ev0.ts_next -= period;