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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-06-18 14:28:17 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-06-26 19:05:29 +0200 |
| commit | 62ad08cef993f7a103b6d3a5498f6fa49190e085 (patch) | |
| tree | ce38412a01cbdde0d21a18135a5817bdef013b68 | |
| parent | 1889e3166cc5780780d7f40ac2271e5308f32b8e (diff) | |
| download | ffmpeg-62ad08cef993f7a103b6d3a5498f6fa49190e085.tar.gz | |
avcodec/bink: Fix integer overflow in unquantize_dct_coeffs()
Fixes: signed integer overflow: -3447 * 2883584 cannot be represented in type 'int'
Fixes: 15265/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_BINK_fuzzer-5088311799971840
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/bink.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/libavcodec/bink.c b/libavcodec/bink.c index 8392bbeeb0..d18c0ceae4 100644 --- a/libavcodec/bink.c +++ b/libavcodec/bink.c @@ -702,15 +702,15 @@ static int read_dct_coeffs(BinkContext *c, GetBitContext *gb, int32_t block[64], return quant_idx; } -static void unquantize_dct_coeffs(int32_t block[64], const int32_t quant[64], +static void unquantize_dct_coeffs(int32_t block[64], const uint32_t quant[64], int coef_count, int coef_idx[64], const uint8_t *scan) { int i; - block[0] = (block[0] * quant[0]) >> 11; + block[0] = (int)(block[0] * quant[0]) >> 11; for (i = 0; i < coef_count; i++) { int idx = coef_idx[i]; - block[scan[idx]] = (block[scan[idx]] * quant[idx]) >> 11; + block[scan[idx]] = (int)(block[scan[idx]] * quant[idx]) >> 11; } } |