[FFmpeg-cvslog] avcodec/texturedsp: Fix runtime error: left shift of 255 by 24 places cannot be represented in type 'int'

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Fri May 12 13:15:33 2017 +0200| [f225003d17364cd38fd28f268ae2b29abd8e5024] | committer: Michael Niedermayer

avcodec/texturedsp: Fix runtime error: left shift of 255 by 24 places cannot be represented in type 'int'

Fixes: 1505/clusterfuzz-testcase-minimized-4561688818876416

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=f225003d17364cd38fd28f268ae2b29abd8e5024
---

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

diff --git a/libavcodec/texturedsp.c b/libavcodec/texturedsp.c
index 49e97c91ae..90b1eb4f11 100644
--- a/libavcodec/texturedsp.c
+++ b/libavcodec/texturedsp.c
@@ -158,7 +158,7 @@ static inline void dxt3_block_internal(uint8_t *dst, ptrdiff_t stride,
 
         for (x = 0; x < 4; x++) {
             uint8_t alpha = alpha_values[x];
-            uint32_t pixel = colors[code & 3] | (alpha << 24);
+            uint32_t pixel = colors[code & 3] | ((unsigned)alpha << 24);
             code >>= 2;
 
             AV_WL32(dst + x * 4, pixel);