Fixes: signed integer overflow: 6500736 * 473 cannot be represented in type 'int' Fixes: 23259/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MV30_fuzzer-5179394271477760
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/mv30.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/libavcodec/mv30.c b/libavcodec/mv30.c index 76b9170eaf..c83ba7ffbd 100644 --- a/libavcodec/mv30.c +++ b/libavcodec/mv30.c @@ -200,10 +200,10 @@ static inline void idct2_1d(int *blk, int step) { const int t0 = blk[0 * step]; const int t1 = blk[1 * step]; - const int t2 = t1 * 473 >> 8; + const int t2 = (int)(t1 * 473U) >> 8; const int t3 = t2 - t1; - const int t4 = (t1 * 362 >> 8) - t3; - const int t5 = ((t1 * 277 >> 8) - t2) + t4; + const int t4 = ((int)(t1 * 362U) >> 8) - t3; + const int t5 = (((int)(t1 * 277U) >> 8) - t2) + t4; blk[0 * step] = t1 + t0; blk[1 * step] = t0 + t3; -- 2.17.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
