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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-07 03:16:53 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-16 16:00:22 +0200 |
| commit | ef40a32dbb0e98e3b3cc9f8f801153cea5ef6454 (patch) | |
| tree | c38f49042b8b033724b905fabd22610206d2a0d4 | |
| parent | 8464f25089258f3340bb394a147ecb7be6b7a832 (diff) | |
| download | ffmpeg-ef40a32dbb0e98e3b3cc9f8f801153cea5ef6454.tar.gz | |
avcodec/svq3: Fix multiple runtime error: signed integer overflow: 44161 * 61694 cannot be represented in type 'int'
Fixes: 1382/clusterfuzz-testcase-minimized-6013445293998080
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 669419939c1d36be35196859dc73ec9a194157ad)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/svq3.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c index 53f56df58d..008935a739 100644 --- a/libavcodec/svq3.c +++ b/libavcodec/svq3.c @@ -210,7 +210,7 @@ static int svq3_decode_end(AVCodecContext *avctx); static void svq3_luma_dc_dequant_idct_c(int16_t *output, int16_t *input, int qp) { - const int qmul = svq3_dequant_coeff[qp]; + const unsigned qmul = svq3_dequant_coeff[qp]; #define stride 16 int i; int temp[16]; @@ -235,10 +235,10 @@ static void svq3_luma_dc_dequant_idct_c(int16_t *output, int16_t *input, int qp) const int z2 = 7 * temp[4 * 1 + i] - 17 * temp[4 * 3 + i]; const int z3 = 17 * temp[4 * 1 + i] + 7 * temp[4 * 3 + i]; - output[stride * 0 + offset] = (z0 + z3) * qmul + 0x80000 >> 20; - output[stride * 2 + offset] = (z1 + z2) * qmul + 0x80000 >> 20; - output[stride * 8 + offset] = (z1 - z2) * qmul + 0x80000 >> 20; - output[stride * 10 + offset] = (z0 - z3) * qmul + 0x80000 >> 20; + output[stride * 0 + offset] = (int)((z0 + z3) * qmul + 0x80000) >> 20; + output[stride * 2 + offset] = (int)((z1 + z2) * qmul + 0x80000) >> 20; + output[stride * 8 + offset] = (int)((z1 - z2) * qmul + 0x80000) >> 20; + output[stride * 10 + offset] = (int)((z0 - z3) * qmul + 0x80000) >> 20; } } #undef stride |