[FFmpeg-cvslog] avcodec/mlpdsp: Fix undefined shift ff_mlp_pack_output()

[Michael Niedermayer]

ffmpeg | branch: release/3.3 | Michael Niedermayer <michael at niedermayer.cc> | Wed Nov 15 03:38:37 2017 +0100| [f4e25620a1fc815eceafebf6d3c8a52351b2049b] | committer: Michael Niedermayer

avcodec/mlpdsp: Fix undefined shift ff_mlp_pack_output()

Fixes: runtime error: left shift of negative value -7862264
Fixes: 4074/clusterfuzz-testcase-minimized-4516104123711488

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 4f7f70738e8dd77a698a5e28bba552ea7064af21)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f4e25620a1fc815eceafebf6d3c8a52351b2049b
---

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

diff --git a/libavcodec/mlpdsp.c b/libavcodec/mlpdsp.c
index fbafa92d72..4e3a16c781 100644
--- a/libavcodec/mlpdsp.c
+++ b/libavcodec/mlpdsp.c
@@ -117,7 +117,7 @@ int32_t ff_mlp_pack_output(int32_t lossless_check_data,
                           (1U << output_shift[mat_ch]);
             lossless_check_data ^= (sample & 0xffffff) << mat_ch;
             if (is32)
-                *data_32++ = sample << 8;
+                *data_32++ = sample * 256;
             else
                 *data_16++ = sample >> 8;
         }