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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-10-10 18:26:44 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 11:30:43 +0100 |
| commit | 0240d56daf3250500885fd0ad82d07afd8cf7f7c (patch) | |
| tree | 6b9f153ccce030b3f99eaf31074167af645ccce5 | |
| parent | 3088c82476a6686b32d43e855d22a388724d7f23 (diff) | |
| download | ffmpeg-0240d56daf3250500885fd0ad82d07afd8cf7f7c.tar.gz | |
avcodec/qdmc: Check input space in qdmc_get_vlc()
Fixes: Timeout (125sec -> 0.4sec)
Fixes: 18059/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QDMC_fuzzer-5656195825664000
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 2c7975fe6f5c734fce9c59e8418c7f2de15a558d)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/qdmc.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/qdmc.c b/libavcodec/qdmc.c index 8bea1552e1..10ceb7aa55 100644 --- a/libavcodec/qdmc.c +++ b/libavcodec/qdmc.c @@ -367,6 +367,8 @@ static int qdmc_get_vlc(GetBitContext *gb, VLC *table, int flag) { int v; + if (get_bits_left(gb) < 1) + return AVERROR_INVALIDDATA; v = get_vlc2(gb, table->table, table->bits, 1); if (v < 0) return AVERROR_INVALIDDATA; |