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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-06-22 12:35:24 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 11:30:42 +0100 |
| commit | 62bcdd07b242baddaeef3ad14104b8b02ce11592 (patch) | |
| tree | 9d446d2e382960a7c826e6312751c896f6fc4f09 /libavcodec/vc1_block.c | |
| parent | 29ebbe8cfef680efd28db3e863a163d700ea05b9 (diff) | |
| download | ffmpeg-62bcdd07b242baddaeef3ad14104b8b02ce11592.tar.gz | |
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 <michael@niedermayer.cc>
(cherry picked from commit b153ba1c2e03d3148766a3ebf0e9c485197f30de)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/vc1_block.c')
| -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) { |