wma: fix off-by-one in array bounds check.

Message ID 20120314210242.8BC1D5E088@aruru.libav.org
State New
Headers show

Commit Message

Janne Grunau March 14, 2012, 9:02 p.m.
Module: libav
Branch: release/0.8
Commit: 1fcc2c60914c1fd9c516203f675676e1586b0376

Author:    Ronald S. Bultje <rsbultje@gmail.com>
Committer: Reinhard Tartler <siretart@tauware.de>
Date:      Wed Mar  7 14:18:14 2012 -0800

wma: fix off-by-one in array bounds check.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
(cherry picked from commit b4bccf3e4e58f6fe58043791ca09db01a4343fac)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>

---

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

Patch

diff --git a/libavcodec/wmadec.c b/libavcodec/wmadec.c
index 37feca1..a730059 100644
--- a/libavcodec/wmadec.c
+++ b/libavcodec/wmadec.c
@@ -356,7 +356,7 @@  static int decode_exp_vlc(WMACodecContext *s, int ch)
         }
         /* NOTE: this offset is the same as MPEG4 AAC ! */
         last_exp += code - 60;
-        if ((unsigned)last_exp + 60 > FF_ARRAY_ELEMS(pow_tab)) {
+        if ((unsigned)last_exp + 60 >= FF_ARRAY_ELEMS(pow_tab)) {
             av_log(s->avctx, AV_LOG_ERROR, "Exponent out of range: %d\n",
                    last_exp);
             return -1;