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mov: validate sidx timescale

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A negative timescale doesn't make sense and triggers assertions in
av_rescale_rnd.

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2016-10-23 16:48:01 +02:00
parent a398f054fd
commit 9d36602abc
1 changed files with 5 additions and 0 deletions
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5
libavformat/mov.c
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@ -4247,6 +4247,11 @@ static int mov_read_sidx(MOVContext *c, AVIOContext *pb, MOVAtom atom)
timescale = av_make_q(1, avio_rb32(pb)); timescale = av_make_q(1, avio_rb32(pb));
if (timescale.den <= 0) {
av_log(c->fc, AV_LOG_ERROR, "Invalid sidx timescale 1/%d\n", timescale.den);
return AVERROR_INVALIDDATA;
}
if (version == 0) { if (version == 0) {
pts = avio_rb32(pb); pts = avio_rb32(pb);
offset += avio_rb32(pb); offset += avio_rb32(pb);