[FFmpeg-cvslog] truemotion1: Check index, fix out of array read

[Michael Niedermayer]

ffmpeg | branch: release/0.5 | Michael Niedermayer <michaelni at gmx.at> | Wed May 30 16:19:36 2012 +0200| [cc511b36f35400bc13f3987da374462f7c20c6c5] | committer: Michael Niedermayer

truemotion1: Check index, fix out of array read

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit fd4c1c0b70b5a06dd572d7e27799a2f4c3d9b984)

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cc511b36f35400bc13f3987da374462f7c20c6c5
---

 libavcodec/truemotion1.c |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/libavcodec/truemotion1.c b/libavcodec/truemotion1.c
index 1cf56ed..ada1270 100644
--- a/libavcodec/truemotion1.c
+++ b/libavcodec/truemotion1.c
@@ -519,6 +519,10 @@ hres,vres,i,i%vres (0 < i < 4)
 }
 
 #define APPLY_C_PREDICTOR() \
+    if(index > 1023){\
+        av_log(s->avctx, AV_LOG_ERROR, " index %d went out of bounds\n", index); \
+        return; \
+    }\
     predictor_pair = s->c_predictor_table[index]; \
     horiz_pred += (predictor_pair >> 1); \
     if (predictor_pair & 1) { \
@@ -536,6 +540,10 @@ hres,vres,i,i%vres (0 < i < 4)
         index++;
 
 #define APPLY_C_PREDICTOR_24() \
+    if(index > 1023){\
+        av_log(s->avctx, AV_LOG_ERROR, " index %d went out of bounds\n", index); \
+        return; \
+    }\
     predictor_pair = s->c_predictor_table[index]; \
     horiz_pred += (predictor_pair >> 1); \
     if (predictor_pair & 1) { \
@@ -554,6 +562,10 @@ hres,vres,i,i%vres (0 < i < 4)
 
 
 #define APPLY_Y_PREDICTOR() \
+    if(index > 1023){\
+        av_log(s->avctx, AV_LOG_ERROR, " index %d went out of bounds\n", index); \
+        return; \
+    }\
     predictor_pair = s->y_predictor_table[index]; \
     horiz_pred += (predictor_pair >> 1); \
     if (predictor_pair & 1) { \
@@ -571,6 +583,10 @@ hres,vres,i,i%vres (0 < i < 4)
         index++;
 
 #define APPLY_Y_PREDICTOR_24() \
+    if(index > 1023){\
+        av_log(s->avctx, AV_LOG_ERROR, " index %d went out of bounds\n", index); \
+        return; \
+    }\
     predictor_pair = s->y_predictor_table[index]; \
     horiz_pred += (predictor_pair >> 1); \
     if (predictor_pair & 1) { \