[FFmpeg-cvslog] avcodec/aacps: Fix undefined behavior

[Michael Niedermayer]

ffmpeg | branch: release/3.3 | Michael Niedermayer <michael at niedermayer.cc> | Fri May  5 13:16:07 2017 +0200| [dd349b24ce242320dec45aded3b9a9542bf435f1] | committer: Michael Niedermayer

avcodec/aacps: Fix undefined behavior

Fixes: 1337/clusterfuzz-testcase-minimized-5212314171080704

Fixes the existence of a potentially invalid pointer intermediate

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 527f89e05922e840083ac6d49eeb838b1e350dd4)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=dd349b24ce242320dec45aded3b9a9542bf435f1
---

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

diff --git a/libavcodec/aacps.c b/libavcodec/aacps.c
index ccc79ffc1d..48b595adbd 100644
--- a/libavcodec/aacps.c
+++ b/libavcodec/aacps.c
@@ -975,7 +975,7 @@ static void stereo_processing(PSContext *ps, INTFLOAT (*l)[32][2], INTFLOAT (*r)
                 h_step[1][3] = AAC_MSUB31_V3(H22[1][e+1][b], h[1][3], width);
             }
             ps->dsp.stereo_interpolate[!PS_BASELINE && ps->enable_ipdopd](
-                l[k] + start + 1, r[k] + start + 1,
+                l[k] + 1 + start, r[k] + 1 + start,
                 h, h_step, stop - start);
         }
     }