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avcodec/wavpack: Fix invalid shift

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Fixes: runtime error: left shift of 1 by 31 places cannot be represented in type 'int'
Fixes: 2377/clusterfuzz-testcase-minimized-6108505935183872

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 c07af72098)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-06-27 13:47:32 +02:00
parent a5e969dd28
commit 610bd59522
1 changed files with 2 additions and 2 deletions
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4
libavcodec/wavpack.c
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@ -835,9 +835,9 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
continue;
}
bytestream2_get_buffer(&gb, val, 4);
if (val[0] > 31) {
if (val[0] > 30) {
av_log(avctx, AV_LOG_ERROR,
"Invalid INT32INFO, extra_bits = %d (> 32)\n", val[0]);
"Invalid INT32INFO, extra_bits = %d (> 30)\n", val[0]);
continue;
} else if (val[0]) {
s->extra_bits = val[0];