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swresample/resample: Limit filter length

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Related to CID1197063

The limit choosen is arbitrary and much larger than what makes sense.
It avoids the need for checking arithmetic operations with the length for overflow

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit f9158b01d0)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-04-08 00:19:07 +02:00
parent b479b42b26
commit 352b0969e2
1 changed files with 5 additions and 0 deletions
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5
libswresample/resample.c
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@ -229,6 +229,11 @@ static ResampleContext *resample_init(ResampleContext *c, int out_rate, int in_r
av_assert0(0);
}
if (filter_size/factor > INT32_MAX/256) {
av_log(NULL, AV_LOG_ERROR, "Filter length too large\n");
goto error;
}
c->phase_shift = phase_shift;
c->phase_mask = phase_count - 1;
c->linear = linear;