[FFmpeg-cvslog] avcodec/aacdec_fixed: Fix integer overflow in apply_independent_coupling_fixed()

[Michael Niedermayer]

ffmpeg | branch: release/3.3 | Michael Niedermayer <michael at niedermayer.cc> | Sat Mar 31 21:19:19 2018 +0200| [ae2c159b87f2ee5c12c9403deadf3ccdeb2503c4] | committer: Michael Niedermayer

avcodec/aacdec_fixed: Fix integer overflow in apply_independent_coupling_fixed()

I was not able to reproduce this, this fix is based on just the fuzzer log.
Fixes: 4959/clusterfuzz-testcase-minimized-6035350934781952

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 197a4e8feed45b2e5868760240e83636818f32a9)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ae2c159b87f2ee5c12c9403deadf3ccdeb2503c4
---

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

diff --git a/libavcodec/aacdec_fixed.c b/libavcodec/aacdec_fixed.c
index 6ba0e63325..b19a622403 100644
--- a/libavcodec/aacdec_fixed.c
+++ b/libavcodec/aacdec_fixed.c
@@ -417,7 +417,7 @@ static void apply_independent_coupling_fixed(AACContext *ac,
     int i, c, shift, round, tmp;
     const int gain = cce->coup.gain[index][0];
     const int *src = cce->ch[0].ret;
-    int *dest = target->ret;
+    unsigned int *dest = target->ret;
     const int len = 1024 << (ac->oc[1].m4ac.sbr == 1);
 
     c = cce_scale_fixed[gain & 7];