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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-02 10:54:31 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-11 21:23:48 +0200 |
| commit | a73090f2e1ff02d9f72e19882d50813cef120e5d (patch) | |
| tree | 4a4dfa02468cddbce10db78101777896736da045 | |
| parent | 9190bd717be41126b1b752db526872d3453af84c (diff) | |
| download | ffmpeg-a73090f2e1ff02d9f72e19882d50813cef120e5d.tar.gz | |
avcodec/smacker: Check remaining bits in SMK_BLK_FULL
Fixes: out of array access
Fixes: 26047/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SMACKER_fuzzer-5083031667474432
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 42ded4d1e6fb0086a235dc584118414ae2bf30c9)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/smacker.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/smacker.c b/libavcodec/smacker.c index 6e6aa34d29..9731b707aa 100644 --- a/libavcodec/smacker.c +++ b/libavcodec/smacker.c @@ -477,6 +477,8 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, case SMK_BLK_FULL: mode = 0; if(avctx->codec_tag == MKTAG('S', 'M', 'K', '4')) { // In case of Smacker v4 we have three modes + if (get_bits_left(&gb) < 1) + return AVERROR_INVALIDDATA; if(get_bits1(&gb)) mode = 1; else if(get_bits1(&gb)) mode = 2; } |