ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Sun May 7 03:16:53 2017 +0200| [669419939c1d36be35196859dc73ec9a194157ad] | committer: Michael Niedermayer
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 <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=669419939c1d36be35196859dc73ec9a194157ad --- libavcodec/svq3.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c index 76a465b9c0..f95d39fc38 100644 --- a/libavcodec/svq3.c +++ b/libavcodec/svq3.c @@ -223,7 +223,7 @@ 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]; @@ -248,10 +248,10 @@ 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 _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
