From 242b9e3b0b0670e2a620204234139db88f1f8440 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 15 May 2017 21:21:20 +0200 Subject: [PATCH] avcodec/svq3: Fix runtime error: left shift of negative value -6 Fixes: 1604/clusterfuzz-testcase-minimized-5312060206350336 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit a6eb006ad47beb6d5e5cc2c99f8185965209ec6b) Signed-off-by: Michael Niedermayer --- libavcodec/svq3.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c index 4a1b1ecbce..39b063358d 100644 --- a/libavcodec/svq3.c +++ b/libavcodec/svq3.c @@ -395,8 +395,8 @@ static inline int svq3_mc_dir(SVQ3Context *s, int size, int mode, if (mode != PREDICT_MODE) { pred_motion(h, k, part_width >> 2, dir, 1, &mx, &my); } else { - mx = s->next_pic->motion_val[0][b_xy][0] << 1; - my = s->next_pic->motion_val[0][b_xy][1] << 1; + mx = s->next_pic->motion_val[0][b_xy][0] * 2; + my = s->next_pic->motion_val[0][b_xy][1] * 2; if (dir == 0) { mx = mx * h->frame_num_offset /