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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-08-12 22:43:33 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-11-01 00:52:46 +0100 |
| commit | 488c246bf565d56f153874d1348435c7187679a1 (patch) | |
| tree | b2ff08b29f5bb41d3b343dc45589f318413cc886 /libavcodec | |
| parent | 0ea1b62b9ac50739b12b9d72c991456ed2f2d192 (diff) | |
| download | ffmpeg-488c246bf565d56f153874d1348435c7187679a1.tar.gz | |
avcodec/shorten: Check verbatim length
Fixes: Timeout
Fixes: 9252/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SHORTEN_fuzzer-5780720709533696
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 7007dabec08f2f9f81661e71ef482dde394e17a8)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/shorten.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c index 68c2a2d804..010000d0a1 100644 --- a/libavcodec/shorten.c +++ b/libavcodec/shorten.c @@ -623,6 +623,11 @@ static int shorten_decode_frame(AVCodecContext *avctx, void *data, switch (cmd) { case FN_VERBATIM: len = get_ur_golomb_shorten(&s->gb, VERBATIM_CKSIZE_SIZE); + if (len < 0 || len > get_bits_left(&s->gb)) { + av_log(avctx, AV_LOG_ERROR, "verbatim length %d invalid\n", + len); + return AVERROR_INVALIDDATA; + } while (len--) get_ur_golomb_shorten(&s->gb, VERBATIM_BYTE_SIZE); break; |