[FFmpeg-cvslog] avcodec/gsmdec_template: Fix runtime error: signed integer overflow: -22527 * 99113 cannot be represented in type 'int'

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Tue Feb 21 16:38:00 2017 +0100| [a59505ca76718549dfc51b9622e2d88cb60f33b5] | committer: Michael Niedermayer

avcodec/gsmdec_template: Fix runtime error: signed integer overflow: -22527 * 99113 cannot be represented in type 'int'

Fixes: 636/clusterfuzz-testcase-6520876646268928
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=a59505ca76718549dfc51b9622e2d88cb60f33b5
---

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

diff --git a/libavcodec/gsmdec_template.c b/libavcodec/gsmdec_template.c
index 9b3c0e9..4e40a20 100644
--- a/libavcodec/gsmdec_template.c
+++ b/libavcodec/gsmdec_template.c
@@ -41,7 +41,7 @@ static void apcm_dequant_add(GetBitContext *gb, int16_t *dst, const int *frame_b
 
 static inline int gsm_mult(int a, int b)
 {
-    return (a * b + (1 << 14)) >> 15;
+    return (int)(a * (SUINT)b + (1 << 14)) >> 15;
 }
 
 static void long_term_synth(int16_t *dst, int lag, int gain_idx)