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avcodec/apedec: Check length in long_filter_high_3800()

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Fixes out of array read
Fixes: 0a7ff0c1d93da9cef28a315ec91b692a/asan_heap-oob_4a52e5_3604_9c56dbb20e308f4faeef7b35f688521a.ape

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-12-02 21:16:27 +01:00
parent 1ac89869db
commit cd7524fdd1
1 changed files with 3 additions and 0 deletions
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3
libavcodec/apedec.c
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@ -892,6 +892,9 @@ static void long_filter_high_3800(int32_t *buffer, int order, int shift, int len
int32_t dotprod, sign;
int32_t coeffs[256], delay[256];
if (order >= length)
return;
memset(coeffs, 0, order * sizeof(*coeffs));
for (i = 0; i < order; i++)
delay[i] = buffer[i];