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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-10 00:56:45 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-10 01:10:55 +0200 |
| commit | ed3c9b5b0dd5abb545c48e930e1c32c187b0776a (patch) | |
| tree | 030324f858dc4eda6c8d866992bd78a806fe2887 | |
| parent | ddb2dd7edbccc5596d8e3c039133be8444cb1d02 (diff) | |
| download | ffmpeg-ed3c9b5b0dd5abb545c48e930e1c32c187b0776a.tar.gz | |
avcodec/lagarith: Check scale_factor
Fixes: 1425/clusterfuzz-testcase-minimized-6295712339853312
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/lagarith.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavcodec/lagarith.c b/libavcodec/lagarith.c index 044497720f..1f4afc5312 100644 --- a/libavcodec/lagarith.c +++ b/libavcodec/lagarith.c @@ -191,7 +191,9 @@ static int lag_read_prob_header(lag_rac *rac, GetBitContext *gb) } scale_factor++; - cumulative_target = 1 << scale_factor; + if (scale_factor >= 32U) + return AVERROR_INVALIDDATA; + cumulative_target = 1U << scale_factor; if (scaled_cumul_prob > cumulative_target) { av_log(rac->avctx, AV_LOG_ERROR, |