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avcodec/wavpacl: Fix runtime error: left shift of negative value -1 

Fixes: 607/clusterfuzz-testcase-5108792465293312

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-02-19 15:09:34 +01:00
parent 3e1028c625
commit 12eebb845a
1 changed files with 1 additions and 1 deletions
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2
libavcodec/wavpack.c
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@ -682,7 +682,7 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
s->hybrid_bitrate = s->frame_flags & WV_HYBRID_BITRATE;
s->post_shift = bpp * 8 - orig_bpp + ((s->frame_flags >> 13) & 0x1f);
s->hybrid_maxclip = ((1LL << (orig_bpp - 1)) - 1);
s->hybrid_minclip = ((-1LL << (orig_bpp - 1)));
s->hybrid_minclip = ((-1UL << (orig_bpp - 1)));
s->CRC = bytestream2_get_le32(&gb);
// parse metadata blocks