[FFmpeg-cvslog] Update dimensions in AVCodecContext when RV3/4 frame dimensions change

[Kostya Shishkov]

ffmpeg | branch: release/0.5 | Kostya Shishkov <kostya.shishkov at gmail.com> | Sun Nov 22 07:48:35 2009 +0000| [44511b17cbbb524602c91a198e7314fa57a7062a] | committer: Reinhard Tartler

Update dimensions in AVCodecContext when RV3/4 frame dimensions change

Originally committed as revision 20572 to svn://svn.ffmpeg.org/ffmpeg/trunk
(cherry picked from commit ec10d2d53999f6edf7d7b5ac88df263eccfb1fb0)

Fixes heap corruption crashes

Addresses: CVE-2011-0722
Signed-off-by: Reinhard Tartler <siretart at tauware.de>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=44511b17cbbb524602c91a198e7314fa57a7062a
---

 libavcodec/rv34.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/rv34.c b/libavcodec/rv34.c
index c227707..9fe3919 100644
--- a/libavcodec/rv34.c
+++ b/libavcodec/rv34.c
@@ -1247,8 +1247,8 @@ static int rv34_decode_slice(RV34DecContext *r, int end, const uint8_t* buf, int
         if(s->width != r->si.width || s->height != r->si.height){
             av_log(s->avctx, AV_LOG_DEBUG, "Changing dimensions to %dx%d\n", r->si.width,r->si.height);
             MPV_common_end(s);
-            s->width  = r->si.width;
-            s->height = r->si.height;
+            s->width  = s->avctx->width  = r->si.width;
+            s->height = s->avctx->height = r->si.height;
             if(MPV_common_init(s) < 0)
                 return -1;
             r->intra_types_hist = av_realloc(r->intra_types_hist, s->b4_stride * 4 * 2 * sizeof(*r->intra_types_hist));