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avcodec/mlpdsp: Fix a invalid shift in ff_mlp_rematrix_channel() 

Fixes: left shift of negative value -2
Fixes: 20305/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEHD_fuzzer-5677196618498048

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Jai Luthra <me@jailuthra.in>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit fcc9f13717)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-02-01 23:25:42 +01:00
parent ebbce3fa18
commit 2517ab2fa3
1 changed files with 1 additions and 1 deletions
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libavcodec/mlpdsp.c
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@ -79,7 +79,7 @@ void ff_mlp_rematrix_channel(int32_t *samples,
if (matrix_noise_shift) {
index &= access_unit_size_pow2 - 1;
accum += noise_buffer[index] << (matrix_noise_shift + 7);
accum += noise_buffer[index] * (1 << (matrix_noise_shift + 7));
index += index2;
}