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avformat/mvdec: Do not set invalid sample rate 

Fixes: signed integer overflow: -682581959642593728 * 16 cannot be represented in type 'long'
Fixes: 37883/clusterfuzz-testcase-minimized-ffmpeg_dem_MV_fuzzer-5311691517198336

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-09-15 22:00:46 +02:00
parent f624c92d4c
commit 737e6bf216
1 changed files with 3 additions and 2 deletions
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5
libavformat/mvdec.c
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@ -156,9 +156,10 @@ static int parse_audio_var(AVFormatContext *avctx, AVStream *st,
} else if (!strcmp(name, "NUM_CHANNELS")) {
return set_channels(avctx, st, var_read_int(pb, size));
} else if (!strcmp(name, "SAMPLE_RATE")) {
st->codecpar->sample_rate = var_read_int(pb, size);
if (st->codecpar->sample_rate <= 0)
int sample_rate = var_read_int(pb, size);
if (sample_rate <= 0)
return AVERROR_INVALIDDATA;
st->codecpar->sample_rate = sample_rate;
avpriv_set_pts_info(st, 33, 1, st->codecpar->sample_rate);
} else if (!strcmp(name, "SAMPLE_WIDTH")) {
uint64_t bpc = var_read_int(pb, size) * (uint64_t)8;