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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-18 22:04:14 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-24 19:11:12 +0200 |
| commit | bca0735be52e471b1906aed34c60028d90646d90 (patch) | |
| tree | 0f8a09c06c50f349bbd34addb81ef4feb61990f0 /libavcodec/vp9dsp_template.c | |
| parent | c2ccd76fd000f69e355280b487213fb63821c8aa (diff) | |
| download | ffmpeg-bca0735be52e471b1906aed34c60028d90646d90.tar.gz | |
avcodec/vp9dsp_template: Fix some overflows in iadst8_1d()
Fixes: signed integer overflow: 190587 * 11585 cannot be represented in type 'int'
Fixes: 26407/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VP9_fuzzer-5086348408782848
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/vp9dsp_template.c')
| -rw-r--r-- | libavcodec/vp9dsp_template.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/libavcodec/vp9dsp_template.c b/libavcodec/vp9dsp_template.c index bfabe63536..3acf94c583 100644 --- a/libavcodec/vp9dsp_template.c +++ b/libavcodec/vp9dsp_template.c @@ -1275,10 +1275,10 @@ static av_always_inline void iadst8_1d(const dctcoef *in, ptrdiff_t stride, t6 = (dctint)((1U << 13) + t4a - t6a) >> 14; t7 = (dctint)((1U << 13) + t5a - t7a) >> 14; - out[3] = -(((t2 + t3) * 11585 + (1 << 13)) >> 14); - out[4] = ((t2 - t3) * 11585 + (1 << 13)) >> 14; - out[2] = ((t6 + t7) * 11585 + (1 << 13)) >> 14; - out[5] = -(((t6 - t7) * 11585 + (1 << 13)) >> 14); + out[3] = -((dctint)((t2 + t3) * 11585U + (1 << 13)) >> 14); + out[4] = (dctint)((t2 - t3) * 11585U + (1 << 13)) >> 14; + out[2] = (dctint)((t6 + t7) * 11585U + (1 << 13)) >> 14; + out[5] = -((dctint)((t6 - t7) * 11585U + (1 << 13)) >> 14); } itxfm_wrap(8, 5) |