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avcodec/mlpdsp: Fix undefined shift ff_mlp_pack_output() 

Fixes: runtime error: left shift of negative value -7862264
Fixes: 4074/clusterfuzz-testcase-minimized-4516104123711488

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-11-15 03:38:37 +01:00
parent 2ab9568a2c
commit 4f7f70738e
1 changed files with 1 additions and 1 deletions
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libavcodec/mlpdsp.c
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@ -117,7 +117,7 @@ int32_t ff_mlp_pack_output(int32_t lossless_check_data,
(1U << output_shift[mat_ch]);
lossless_check_data ^= (sample & 0xffffff) << mat_ch;
if (is32)
*data_32++ = sample << 8;
*data_32++ = sample * 256;
else
*data_16++ = sample >> 8;
}