[FFmpeg-cvslog] avcodec/hq_hqadsp: Fix runtime error: signed integer overflow: 80359 * 30274 cannot be represented in type 'int'

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sat May 13 01:12:35 2017 +0200| [e66488252335d3e7870c72d1ac7040e8c1853f07] | committer: Michael Niedermayer

avcodec/hq_hqadsp: Fix runtime error: signed integer overflow: 80359 * 30274 cannot be represented in type 'int'

Fixes: 1507/clusterfuzz-testcase-minimized-4955228300378112

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=e66488252335d3e7870c72d1ac7040e8c1853f07
---

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

diff --git a/libavcodec/hq_hqadsp.c b/libavcodec/hq_hqadsp.c
index db1ea2e246..1b9f138c72 100644
--- a/libavcodec/hq_hqadsp.c
+++ b/libavcodec/hq_hqadsp.c
@@ -30,7 +30,7 @@
 #define FIX_1_414 23170
 #define FIX_2_613 21407 // divided by two to fit the range
 
-#define IDCTMUL(a, b) ((a) * (b) >> 16)
+#define IDCTMUL(a, b) ((int)((a) * (unsigned)(b)) >> 16)
 
 static inline void idct_row(int16_t *blk)
 {