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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-10-10 18:26:44 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-11 20:18:48 +0100 |
| commit | 0cdd0486ef0640fe230d66a12e8d5d8b6dc891e8 (patch) | |
| tree | 4f3d825032e8dfd59cced28c5d8421151348f7cc | |
| parent | 6996d323a00f5ec23f2998218267af55899a0a3c (diff) | |
| download | ffmpeg-0cdd0486ef0640fe230d66a12e8d5d8b6dc891e8.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 b40edc17cc..6af1c4af57 100644 --- a/libavcodec/qdmc.c +++ b/libavcodec/qdmc.c @@ -365,6 +365,8 @@ 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; |