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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-15 03:32:43 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-17 00:27:31 +0200 |
| commit | 9bfa8b692ebd3718e1ba6f67bfc61a29fc3f1b7d (patch) | |
| tree | 45acbeee7021eabbebc4f6bc0babeca668071d40 | |
| parent | e154826a2f020f966a677cfbff4a97d7a0a94d5f (diff) | |
| download | ffmpeg-9bfa8b692ebd3718e1ba6f67bfc61a29fc3f1b7d.tar.gz | |
avcodec/diracdec: Check perspective_exp and zrs_exp.
Fixes: undefined shift
Fixes: runtime error: shift exponent 264 is too large for 32-bit type 'int'
Fixes: 2860/clusterfuzz-testcase-minimized-4672811689836544
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 1e6cab874512070b36267a5a53fd053f90072fa2)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/diracdec.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c index 450a5bb91e..80c4e66eed 100644 --- a/libavcodec/diracdec.c +++ b/libavcodec/diracdec.c @@ -1082,6 +1082,10 @@ static int dirac_unpack_prediction_parameters(DiracContext *s) s->globalmc[ref].perspective[0] = dirac_get_se_golomb(gb); s->globalmc[ref].perspective[1] = dirac_get_se_golomb(gb); } + if (s->globalmc[ref].perspective_exp + (uint64_t)s->globalmc[ref].zrs_exp > 30) { + return AVERROR_INVALIDDATA; + } + } } |