[FFmpeg-cvslog] shorten: Fix out of bound writes in fix_bitshift()

[Laurent Aimar]

ffmpeg | branch: release/0.8 | Laurent Aimar <fenrir at videolan.org> | Fri Sep 30 01:26:22 2011 +0000| [737bea21b6c2c1d4dca0b7b18824c0a3205556d2] | committer: Reinhard Tartler

shorten: Fix out of bound writes in fix_bitshift()

The data pointers s->decoded[*] already take into account s->nwrap.

Signed-off-by: Janne Grunau <janne-libav at jannau.net>
(cherry picked from commit 5f05cf4ea9aaafed8edcabe785c2719786103ec1)

Signed-off-by: Anton Khirnov <anton at khirnov.net>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=737bea21b6c2c1d4dca0b7b18824c0a3205556d2
---

 libavcodec/shorten.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c
index 3d441e4..13381f6 100644
--- a/libavcodec/shorten.c
+++ b/libavcodec/shorten.c
@@ -155,7 +155,7 @@ static void fix_bitshift(ShortenContext *s, int32_t *buffer)
 
     if (s->bitshift != 0)
         for (i = 0; i < s->blocksize; i++)
-            buffer[s->nwrap + i] <<= s->bitshift;
+            buffer[i] <<= s->bitshift;
 }