[FFmpeg-cvslog] avcodec/ttadata: Add sentinel at the end of ff_tta_shift_1

[Michael Niedermayer]

ffmpeg | branch: release/4.4 | Michael Niedermayer <michael at niedermayer.cc> | Tue Jun  8 20:10:56 2021 +0200| [93ef1742117b914da8426c66a3cadb545568ce67] | committer: Michael Niedermayer

avcodec/ttadata: Add sentinel at the end of ff_tta_shift_1

Fixes: out of array access
Fixes: 34933/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TTA_fuzzer-5629322560929792

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 dbbcfbcc4e4f0e91f814f2e13ced7b6d99069518)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=93ef1742117b914da8426c66a3cadb545568ce67
---

 libavcodec/ttadata.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/ttadata.c b/libavcodec/ttadata.c
index bf793a4cc8..aa9f418a7d 100644
--- a/libavcodec/ttadata.c
+++ b/libavcodec/ttadata.c
@@ -30,7 +30,8 @@ const uint32_t ff_tta_shift_1[] = {
     0x01000000, 0x02000000, 0x04000000, 0x08000000,
     0x10000000, 0x20000000, 0x40000000, 0x80000000,
     0x80000000, 0x80000000, 0x80000000, 0x80000000,
-    0x80000000, 0x80000000, 0x80000000, 0x80000000
+    0x80000000, 0x80000000, 0x80000000, 0x80000000,
+    0xFFFFFFFF
 };
 
 const uint32_t * const ff_tta_shift_16 = ff_tta_shift_1 + 4;