ffmpeg | branch: master | Michael Niedermayer <[email protected]> | Thu 
Dec 24 22:16:48 2020 +0100| [f3e4ebb00790312634e42bdd3f80ffbe34ce32e5] | 
committer: Michael Niedermayer

avcodec/siren: Increase noise category 5 and 6

The entry read is not used in subsequent computation, thus its
value is not important.

Fixes: out of array read
Fixes: 
28578/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SIREN_fuzzer-6332019122503680

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <[email protected]>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f3e4ebb00790312634e42bdd3f80ffbe34ce32e5
---

 libavcodec/siren.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/siren.c b/libavcodec/siren.c
index 6c7a8e8b34..22b6997176 100644
--- a/libavcodec/siren.c
+++ b/libavcodec/siren.c
@@ -342,12 +342,12 @@ static const float mlt_quant[7][14] = {
     { 0.0f, 1.964f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 
0.0f, 0.0f, 0.0f }
 };
 
-static const float noise_category5[20] = {
+static const float noise_category5[21] = {
     0.70711f, 0.6179f, 0.5005f, 0.3220f, 0.17678f, 0.17678f, 0.17678f, 
0.17678f, 0.17678f, 0.17678f, 0.17678f,
     0.17678f, 0.17678f, 0.17678f, 0.17678f, 0.17678f, 0.17678f, 0.17678f, 
0.17678f, 0.17678f
 };
 
-static const float noise_category6[20] = {
+static const float noise_category6[21] = {
     0.70711f, 0.5686f, 0.3563f, 0.25f, 0.25f, 0.25f, 0.25f, 0.25f, 0.25f, 
0.25f, 0.25f, 0.25f,
     0.25f, 0.25f, 0.25f, 0.25f, 0.25f, 0.25f, 0.25f, 0.25f
 };

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