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avcodec/ffv1dec: check global header version

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-08-30 03:43:49 +02:00
parent 259292f9d4
commit 20b965a1a4
1 changed files with 4 additions and 0 deletions
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4
libavcodec/ffv1dec.c
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@ -483,6 +483,10 @@ static int read_extra_header(FFV1Context *f)
ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
f->version = get_symbol(c, state, 0);
if (f->version < 2) {
av_log(f->avctx, AV_LOG_ERROR, "Invalid version in global header\n");
return AVERROR_INVALIDDATA;
}
if (f->version > 2) {
c->bytestream_end -= 4;
f->micro_version = get_symbol(c, state, 0);