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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-02-12 21:30:08 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-05 12:43:08 +0200 |
| commit | 40e54383a2f5c4ea64bcf2d486606e2879e53e0d (patch) | |
| tree | c9af47bf69a67de4eab2056e2f96685389c6be3b | |
| parent | f8da048589640353cee66540dc3f14beaba55321 (diff) | |
| download | ffmpeg-40e54383a2f5c4ea64bcf2d486606e2879e53e0d.tar.gz | |
avcodec/adpcm: Fix integer overflow in ADPCM THP
The reference (thp.txt) uses floats so wrap around would seem incorrect.
Fixes: signed integer overflow: 1073741824 + 1073741824 cannot be represented in type 'int'
Fixes: 20658/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ADPCM_THP_fuzzer-5646302555930624
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 b12b05374f7025167e2c43449ceb8ba3f0a6083f)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/adpcm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c index 75ee685b16..e91c59b033 100644 --- a/libavcodec/adpcm.c +++ b/libavcodec/adpcm.c @@ -1479,8 +1479,8 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data, int byte = bytestream2_get_byteu(&gb); int index = (byte >> 4) & 7; unsigned int exp = byte & 0x0F; - int factor1 = table[ch][index * 2]; - int factor2 = table[ch][index * 2 + 1]; + int64_t factor1 = table[ch][index * 2]; + int64_t factor2 = table[ch][index * 2 + 1]; /* Decode 14 samples. */ for (n = 0; n < 14 && (i * 14 + n < nb_samples); n++) { |