On Sat, Dec 14, 2019 at 03:23:40PM -0300, James Almer wrote: > On 12/14/2019 9:08 AM, Michael Niedermayer wrote: > > Fixes: out of array read > > Fixes: > > 19300/clusterfuzz-testcase-minimized-ffmpeg_BSF_VP9_METADATA_fuzzer-5653911730126848 > > > > Found-by: continuous fuzzing process > > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > > --- > > libavcodec/cbs_vp9.c | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/libavcodec/cbs_vp9.c b/libavcodec/cbs_vp9.c > > index 42e4dcf5ac..98730e03e3 100644 > > --- a/libavcodec/cbs_vp9.c > > +++ b/libavcodec/cbs_vp9.c > > @@ -428,6 +428,9 @@ static int cbs_vp9_split_fragment(CodedBitstreamContext > > *ctx, > > index_size = 2 + (((superframe_header & 0x18) >> 3) + 1) * > > ((superframe_header & 0x07) + 1); > > > > + if (index_size > frag->data_size) > > + return AVERROR_INVALIDDATA; > > + > > err = init_get_bits(&gbc, frag->data + frag->data_size - > > index_size, > > 8 * index_size); > > if (err < 0) > > Should be ok.
will apply Thanks [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Observe your enemies, for they first find out your faults. -- Antisthenes
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