diff options
| author | Michael Niedermayer <[email protected]> | 2019-06-22 12:35:24 +0200 |
|---|---|---|
| committer | Michael Niedermayer <[email protected]> | 2019-09-04 20:26:35 +0200 |
| commit | 6449c086f1559e89e3021039dd31595187792be8 (patch) | |
| tree | 374fd03dc57f7a839b2d5d5bfdada9c240fee71a | |
| parent | c99cb72d279cd77fc64d412cf05c906852e229db (diff) | |
avcodec/vc1_block: fix invalid shift in vc1_decode_p_mb()
Fixes: left shift of negative value -5
Fixes: 15294/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VC1_fuzzer-5733921754447872
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <[email protected]>
(cherry picked from commit b153ba1c2e03d3148766a3ebf0e9c485197f30de)
Signed-off-by: Michael Niedermayer <[email protected]>
| -rw-r--r-- | libavcodec/vc1_block.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/vc1_block.c b/libavcodec/vc1_block.c index 97c873f138..7883e4f19c 100644 --- a/libavcodec/vc1_block.c +++ b/libavcodec/vc1_block.c @@ -1378,7 +1378,7 @@ static int vc1_decode_p_mb(VC1Context *v) v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]); if (v->rangeredfrm) for (j = 0; j < 64; j++) - v->block[v->cur_blk_idx][block_map[i]][j] <<= 1; + v->block[v->cur_blk_idx][block_map[i]][j] *= 2; block_cbp |= 0xF << (i << 2); block_intra |= 1 << i; } else if (val) { |