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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-10-20 23:51:58 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 11:30:44 +0100 |
| commit | 71d17a2827195c5daf7acfe551f154bf5c5e1d22 (patch) | |
| tree | 4b35190d33f2743e3b01ed21fc46080006e4c43f | |
| parent | 4d53c962ed53d959421f00859e9707a0f5701113 (diff) | |
| download | ffmpeg-71d17a2827195c5daf7acfe551f154bf5c5e1d22.tar.gz | |
avcodec/atrac3: Check for huge block aligns
The largest documented frame size = block align is 1024 bytes
(https://wiki.multimedia.cx/index.php/ATRAC3)
Without a limit this can allocate arbitrary memory and trigger OOM
Fixes: OOM
Fixes: 18337/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ATRAC3_fuzzer-5763861478637568
Fixes: 18556/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ATRAC3AL_fuzzer-5646183334936576
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 f09151fff9c754fbc1d2560adf18b14957f8b181)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/atrac3.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/atrac3.c b/libavcodec/atrac3.c index dc19a3863e..067aa23f1f 100644 --- a/libavcodec/atrac3.c +++ b/libavcodec/atrac3.c @@ -964,7 +964,7 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx) return AVERROR_INVALIDDATA; } - if (avctx->block_align >= UINT_MAX / 2 || avctx->block_align <= 0) + if (avctx->block_align > 1024 || avctx->block_align <= 0) return AVERROR(EINVAL); q->decoded_bytes_buffer = av_mallocz(FFALIGN(avctx->block_align, 4) + |