[FFmpeg-cvslog] avcodec/mimic: Fix runtime error: index 96 out of bounds for type 'const int8_t [64]'

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu May 11 15:07:28 2017 +0200| [d9051f8f3e60768f68867c3e3116e980d855215a] | committer: Michael Niedermayer

avcodec/mimic: Fix runtime error: index 96 out of bounds for type 'const int8_t [64]'

Fixes: 1468/clusterfuzz-testcase-minimized-5235964056174592

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=d9051f8f3e60768f68867c3e3116e980d855215a
---

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

diff --git a/libavcodec/mimic.c b/libavcodec/mimic.c
index 61ce1ce584..607dffa4a5 100644
--- a/libavcodec/mimic.c
+++ b/libavcodec/mimic.c
@@ -260,7 +260,7 @@ static int vlc_decode_block(MimicContext *ctx, int num_coeffs, int qscale)
         /* FFmpeg's IDCT behaves somewhat different from the original code, so
          * a factor of 4 was added to the input */
 
-        coeff = vlcdec_lookup[num_bits][value];
+        coeff = ((int8_t*)vlcdec_lookup[num_bits])[value];
         if (pos < 3)
             coeff *= 16;
         else /* TODO Use >> 10 instead of / 1001 */