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avformat/utils: Use 64bit earlier in r_frame_rate check 

Fixes: signed integer overflow: 1406796319 * 2 cannot be represented in type 'int'
Fixes: 32777/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-5632576913014784

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 2021-04-12 22:33:06 +02:00
parent fc99d59553
commit 578633fc1a
1 changed files with 1 additions and 1 deletions
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2
libavformat/utils.c
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@ -3988,7 +3988,7 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
if (!st->r_frame_rate.num) {
if ( avctx->time_base.den * (int64_t) st->time_base.num
<= avctx->time_base.num * avctx->ticks_per_frame * (uint64_t) st->time_base.den) {
<= avctx->time_base.num * (uint64_t)avctx->ticks_per_frame * st->time_base.den) {
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
avctx->time_base.den, (int64_t)avctx->time_base.num * avctx->ticks_per_frame, INT_MAX);
} else {