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avformat/rmdec: Use 64bit for intermediate for DEINT_ID_INT4

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Fixes: runtime error: signed integer overflow: 65312 * 65535 cannot be represented in type 'int'
Fixes: 32832/clusterfuzz-testcase-minimized-ffmpeg_dem_RM_fuzzer-4817710040088576

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 2021-04-15 22:44:19 +02:00
parent 2768928624
commit e2c2872393
1 changed files with 2 additions and 2 deletions
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4
libavformat/rmdec.c
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@ -267,9 +267,9 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
case DEINT_ID_INT4:
if (ast->coded_framesize > ast->audio_framesize ||
sub_packet_h <= 1 ||
ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
ast->coded_framesize * (uint64_t)sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
return AVERROR_INVALIDDATA;
if (ast->coded_framesize * sub_packet_h != 2*ast->audio_framesize) {
if (ast->coded_framesize * (uint64_t)sub_packet_h != 2*ast->audio_framesize) {
avpriv_request_sample(s, "mismatching interleaver parameters");
return AVERROR_INVALIDDATA;
}