ffmpeg | branch: release/4.2 | Michael Niedermayer <mich...@niedermayer.cc> | Wed Jul 10 23:27:19 2019 +0200| [7f71ebded4be2d290b5d606de6256ceac0c18b8e] | committer: Michael Niedermayer
avcodec/vc1_pred: Fix invalid shift in scaleforsame() Fixes: left shift of negative value -1 Fixes: 15531/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VC1IMAGE_fuzzer-5759556258365440 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit 6dfda35dd29d2e2a86554d2c05d957a09ab79b0c) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7f71ebded4be2d290b5d606de6256ceac0c18b8e --- libavcodec/vc1_pred.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/vc1_pred.c b/libavcodec/vc1_pred.c index 9e29b44a1f..16565063ea 100644 --- a/libavcodec/vc1_pred.c +++ b/libavcodec/vc1_pred.c @@ -178,7 +178,7 @@ static av_always_inline int scaleforsame(VC1Context *v, int i, int n /* MV */, brfd = FFMIN(v->brfd, 3); scalesame = ff_vc1_b_field_mvpred_scales[0][brfd]; - n = (n * scalesame >> 8) << hpel; + n = (n * scalesame >> 8) * (1 << hpel); return n; } _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
