[FFmpeg-cvslog] avcodec/dvdsubdec: Fix runtime error: left shift of 242 by 24 places cannot be represented in type 'int'

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Fri May  5 02:51:13 2017 +0200| [ce7098b8f2b59c62b5abdb3d74819db75cf67698] | committer: Michael Niedermayer

avcodec/dvdsubdec: Fix runtime error: left shift of 242 by 24 places cannot be represented in type 'int'

Fixes: 1080/clusterfuzz-testcase-5353236754071552

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ce7098b8f2b59c62b5abdb3d74819db75cf67698
---

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

diff --git a/libavcodec/dvdsubdec.c b/libavcodec/dvdsubdec.c
index 4e9c0580f4..e18113c20c 100644
--- a/libavcodec/dvdsubdec.c
+++ b/libavcodec/dvdsubdec.c
@@ -60,7 +60,7 @@ static void yuv_a_to_rgba(const uint8_t *ycbcr, const uint8_t *alpha, uint32_t *
         cb = *ycbcr++;
         YUV_TO_RGB1_CCIR(cb, cr);
         YUV_TO_RGB2_CCIR(r, g, b, y);
-        *rgba++ = (*alpha++ << 24) | (r << 16) | (g << 8) | b;
+        *rgba++ = ((unsigned)*alpha++ << 24) | (r << 16) | (g << 8) | b;
     }
 }