[FFmpeg-cvslog] qpeg: Fix out of array writes.

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sat Mar  3 03:37:52 2012 +0100| [4299dfa5ded84111231a456ad102f65f6f62649e] | committer: Michael Niedermayer

qpeg: Fix out of array writes.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4299dfa5ded84111231a456ad102f65f6f62649e
---

 libavcodec/qpeg.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/libavcodec/qpeg.c b/libavcodec/qpeg.c
index ca48b6b..f2dba73 100644
--- a/libavcodec/qpeg.c
+++ b/libavcodec/qpeg.c
@@ -203,6 +203,8 @@ static void qpeg_decode_inter(const uint8_t *src, uint8_t *dst, int size,
                     filled = 0;
                     dst -= stride;
                     height--;
+                    if(height < 0)
+                        break;
                 }
             }
         } else if(code >= 0xC0) { /* copy code: 0xC0..0xDF */
@@ -214,6 +216,8 @@ static void qpeg_decode_inter(const uint8_t *src, uint8_t *dst, int size,
                     filled = 0;
                     dst -= stride;
                     height--;
+                    if(height < 0)
+                        break;
                 }
             }
             size -= code + 1;