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avformat/msf: Check channels when reading the header

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Fixes integer overflow
Fixes: 0c2625f236ced104d402b4a03c0d65c7/asan_generic_274e1ce_5990_9314e7a67c26aecf011b178ade9f217c.avi

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-12-04 18:48:39 +01:00
parent a85b02dcf7
commit 689a867413
1 changed files with 1 additions and 1 deletions
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2
libavformat/msf.c
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@ -51,7 +51,7 @@ static int msf_read_header(AVFormatContext *s)
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
codec = avio_rb32(s->pb);
st->codec->channels = avio_rb32(s->pb);
if (st->codec->channels <= 0)
if (st->codec->channels <= 0 || st->codec->channels >= INT_MAX / 1024)
return AVERROR_INVALIDDATA;
size = avio_rb32(s->pb);
st->codec->sample_rate = avio_rb32(s->pb);