[FFmpeg-cvslog] avcodec/mlpdec: Fix: runtime error: left shift of negative value -8

[Michael Niedermayer]

ffmpeg | branch: release/3.1 | Michael Niedermayer <michael at niedermayer.cc> | Thu May 18 02:07:17 2017 +0200| [fceacfc1320fd0609fa60b3f238651240a351f16] | committer: Michael Niedermayer

avcodec/mlpdec: Fix: runtime error: left shift of negative value -8

Fixes: 1658/clusterfuzz-testcase-minimized-4889937130291200

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 25c81e4b737bcc737b13c9a752cb301a28cb3906)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fceacfc1320fd0609fa60b3f238651240a351f16
---

 libavcodec/mlpdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/mlpdec.c b/libavcodec/mlpdec.c
index eaf1aa7c75..5426712007 100644
--- a/libavcodec/mlpdec.c
+++ b/libavcodec/mlpdec.c
@@ -759,7 +759,7 @@ static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitCo
             if (get_bits1(gbp))
                 coeff_val = get_sbits(gbp, frac_bits + 2);
 
-            s->matrix_coeff[mat][ch] = coeff_val << (14 - frac_bits);
+            s->matrix_coeff[mat][ch] = coeff_val * (1 << (14 - frac_bits));
         }
 
         if (s->noise_type)