On Fri, Feb 09, 2018 at 04:41:44AM +0100, Michael Niedermayer wrote: > Fixes: out of array access > Fixes: 5919/clusterfuzz-testcase-minimized-5859311382167552 > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > --- > libavcodec/vp3.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c > index cf9c57f5fa..120c20f349 100644 > --- a/libavcodec/vp3.c > +++ b/libavcodec/vp3.c > @@ -978,6 +978,9 @@ static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext > *gb, > if (eob_run_get_bits[token]) > eob_run += get_bits(gb, eob_run_get_bits[token]); > > + if (!eob_run) > + return AVERROR_INVALIDDATA; > + > // record only the number of blocks ended in this plane, > // any spill will be recorded in the next plane. > if (eob_run > num_coeffs - coeff_i) {
this is incorrect for theora, (its correct for vp3) i will post a better patch [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB No great genius has ever existed without some touch of madness. -- Aristotle
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