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avformat/rmdec: use larger intermediate type for audio_framesize * sub_packet_h check

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Fixes: signed integer overflow: 65535 * 65535 cannot be represented in type 'int'
Fixes: 31406/clusterfuzz-testcase-minimized-ffmpeg_dem_IVR_fuzzer-5024692843970560

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 cf2fd9204b)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-03-30 11:03:56 +02:00
parent ed0134946f
commit 0729fe564b
1 changed files with 1 additions and 1 deletions
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2
libavformat/rmdec.c
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@ -296,7 +296,7 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
ast->deint_id == DEINT_ID_GENR ||
ast->deint_id == DEINT_ID_SIPR) {
if (st->codecpar->block_align <= 0 ||
ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
ast->audio_framesize * (uint64_t)sub_packet_h > (unsigned)INT_MAX ||
ast->audio_framesize * sub_packet_h < st->codecpar->block_align)
return AVERROR_INVALIDDATA;
if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)