[FFmpeg-cvslog] avcodec/mlpdsp: Fix undefined shift ff_mlp_pack_output()
Michael Niedermayer
git at videolan.org
Thu Feb 1 01:51:47 EET 2018
ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Wed Nov 15 03:38:37 2017 +0100| [4e5351940fe6a089c980079c2662c67a900992a2] | 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=4e5351940fe6a089c980079c2662c67a900992a2
---
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;
}
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