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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-02-09 04:17:16 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-02-11 19:41:43 +0100 |
| commit | 0ff1825ea354ae145110bd80401cf76a306d7fde (patch) | |
| tree | 3ec7b6edb559ac358878634287d199b89707dfac | |
| parent | 4423cbf1b4c195ca595379737225c3cf7b22233b (diff) | |
| download | ffmpeg-0ff1825ea354ae145110bd80401cf76a306d7fde.tar.gz | |
avcodec/vp3: Check eob_run
Fixes: out of array access
Fixes: 5919/clusterfuzz-testcase-minimized-5859311382167552
Fixes: special case for theora (untested due to lack of sample)
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 570023eab3e2962b4ad8345a157c1e18ca1a6eca)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/vp3.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c index f167acf4ee..fdffc88486 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) + eob_run = INT_MAX; + // 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) { |