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avcodec/wavpack: Fix runtime error: left shift of negative value -5 

Fixes: 729/clusterfuzz-testcase-5154831595470848

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 2017-03-06 21:52:36 +01:00
parent 01a33b835f
commit 3016e919d4
1 changed files with 1 additions and 1 deletions
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2
libavcodec/wavpack.c
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@ -273,7 +273,7 @@ static inline int wv_get_value_integer(WavpackFrameContext *s, uint32_t *crc,
unsigned bit;
if (s->extra_bits) {
S <<= s->extra_bits;
S *= 1 << s->extra_bits;
if (s->got_extra_bits &&
get_bits_left(&s->gb_extra_bits) >= s->extra_bits) {