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avformat/nuv: Check channels 

Fixes: signed integer overflow: -3468545475927866368 * 4 cannot be represented in type 'long'
Fixes: 28879/clusterfuzz-testcase-minimized-ffmpeg_dem_NUV_fuzzer-6303367307591680

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 fc45d924d7)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-01-06 23:42:39 +01:00
parent 846e09c8b3
commit 7faebb4e0a
1 changed files with 4 additions and 0 deletions
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4
libavformat/nuv.c
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@ -121,6 +121,10 @@ static int get_codec_data(AVFormatContext *s, AVIOContext *pb, AVStream *vst,
ast->codecpar->bits_per_coded_sample = avio_rl32(pb);
ast->codecpar->channels = avio_rl32(pb);
ast->codecpar->channel_layout = 0;
if (ast->codecpar->channels <= 0) {
av_log(s, AV_LOG_ERROR, "Invalid channels %d\n", ast->codecpar->channels);
return AVERROR_INVALIDDATA;
}
id = ff_wav_codec_get_id(ast->codecpar->codec_tag,
ast->codecpar->bits_per_coded_sample);