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avcodec/alac: Fix integer overflow in LPC coefficient adaption 

Fixes: signed integer overflow: 267693597 * 10 cannot be represented in type 'int'
Fixes: 19237/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALAC_fuzzer-5755407700328448

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 6a865cec5e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-12-07 20:42:54 +01:00
parent 84048cf37f
commit b36592ce07
1 changed files with 1 additions and 1 deletions
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libavcodec/alac.c
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@ -228,7 +228,7 @@ static void lpc_prediction(int32_t *error_buffer, uint32_t *buffer_out,
sign = sign_only(val) * error_sign;
lpc_coefs[j] -= sign;
val *= (unsigned)sign;
error_val -= (val >> lpc_quant) * (j + 1);
error_val -= (val >> lpc_quant) * (j + 1U);
}
}
}