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| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-09-08 00:13:11 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-09-22 23:47:41 +0200 |
| commit | b12444fe72173ab52b6479708cfd12cb889ca300 (patch) | |
| tree | 5677eb4fffbcf76a4502728451a1f2579f0a7bca /libavcodec/xvididct.c | |
| parent | 6580a7b2b27973947118482235a2eb1214d968a2 (diff) | |
| download | ffmpeg-b12444fe72173ab52b6479708cfd12cb889ca300.tar.gz | |
avcodec/xvididct: Fix integer overflow in idct_row()
Fixes: signed integer overflow: 1871429831 + 343006811 cannot be represented in type 'int'
Fixes: 61784/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AIC_fuzzer-5372151001120768
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/xvididct.c')
| -rw-r--r-- | libavcodec/xvididct.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/xvididct.c b/libavcodec/xvididct.c index 43ea927437..dcea32210a 100644 --- a/libavcodec/xvididct.c +++ b/libavcodec/xvididct.c @@ -114,7 +114,7 @@ static int idct_row(short *in, const int *const tab, int rnd) in[5] = a1; in[6] = a1; } else { - const int k = c4 * in[0] + rnd; + const unsigned int k = c4 * in[0] + rnd; const unsigned int a0 = k + c2 * in[2] + c4 * in[4] + c6 * in[6]; const unsigned int a1 = k + c6 * in[2] - c4 * in[4] - c2 * in[6]; const unsigned int a2 = k - c6 * in[2] - c4 * in[4] + c2 * in[6]; |