mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/vc1_block: Fix invalid shift with rangeredfrm
Fixes: left shift of negative value -7 Fixes: 16959/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMV3_fuzzer-5200360825683968 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -1997,7 +1997,7 @@ static int vc1_decode_b_mb(VC1Context *v)
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v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
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if (v->rangeredfrm)
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for (j = 0; j < 64; j++)
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s->block[i][j] <<= 1;
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s->block[i][j] *= 2;
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s->idsp.put_signed_pixels_clamped(s->block[i],
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s->dest[dst_idx] + off,
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i & 4 ? s->uvlinesize
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