Fixes: left shift of negative value -9 Fixes: 15299/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MSS2_fuzzer-5660922678345728
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/vc1_block.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/vc1_block.c b/libavcodec/vc1_block.c index 7e41791832..6137252580 100644 --- a/libavcodec/vc1_block.c +++ b/libavcodec/vc1_block.c @@ -2600,13 +2600,13 @@ static void vc1_decode_i_blocks(VC1Context *v) if (v->rangeredfrm) for (k = 0; k < 6; k++) for (j = 0; j < 64; j++) - v->block[v->cur_blk_idx][block_map[k]][j] <<= 1; + v->block[v->cur_blk_idx][block_map[k]][j] *= 2; vc1_put_blocks_clamped(v, 1); } else { if (v->rangeredfrm) for (k = 0; k < 6; k++) for (j = 0; j < 64; j++) - v->block[v->cur_blk_idx][block_map[k]][j] = (v->block[v->cur_blk_idx][block_map[k]][j] - 64) << 1; + v->block[v->cur_blk_idx][block_map[k]][j] = (v->block[v->cur_blk_idx][block_map[k]][j] - 64) * 2; vc1_put_blocks_clamped(v, 0); } -- 2.22.0 _______________________________________________ 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".
