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avcodec/ylc: Fix vlc of 31 bits

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Fixes: runtime error: left shift of 1 by 31 places cannot be represented in type 'int'
Fixes: 2515/clusterfuzz-testcase-minimized-6197200012967936

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-07-08 22:51:57 +02:00
parent 2061de8a3f
commit fe9242204d
1 changed files with 1 additions and 1 deletions
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libavcodec/ylc.c
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@ -69,7 +69,7 @@ static void get_tree_codes(uint32_t *bits, int16_t *lens, uint8_t *xlat,
s = nodes[node].sym;
if (s != -1) {
bits[*pos] = (~pfx) & ((1 << FFMAX(pl, 1)) - 1);
bits[*pos] = (~pfx) & ((1U << FFMAX(pl, 1)) - 1);
lens[*pos] = FFMAX(pl, 1);
xlat[*pos] = s + (pl == 0);
(*pos)++;