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ffmpeg/libavcodec
Andreas Cadhalpun 3f5a283174 avcodec/webp: validate the distance prefix code
According to the WebP Lossless Bitstream Specification the highest
allowed value for a prefix code is 39.

If prefix_code is too large, the calculated extra_bits has an invalid
value and triggers an assertion in get_bits.

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 5de2dab12b)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-04-22 12:27:23 +02:00
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