Module: libav
Branch: master
Commit: 791de61bbb0d2bceb1037597b310e2a4a94494fd

Author:    Ronald S. Bultje <[email protected]>
Committer: Ronald S. Bultje <[email protected]>
Date:      Tue Feb 28 18:21:31 2012 -0800

swscale: fix another integer overflow.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: [email protected]

---

 libswscale/utils.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/libswscale/utils.c b/libswscale/utils.c
index 3b488ca..7c89a70 100644
--- a/libswscale/utils.c
+++ b/libswscale/utils.c
@@ -1014,7 +1014,7 @@ int sws_init_context(SwsContext *c, SwsFilter *srcFilter, 
SwsFilter *dstFilter)
     c->vLumBufSize= c->vLumFilterSize;
     c->vChrBufSize= c->vChrFilterSize;
     for (i=0; i<dstH; i++) {
-        int chrI= i*c->chrDstH / dstH;
+        int chrI = (int64_t) i * c->chrDstH / dstH;
         int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,
                            ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 
1)<<c->chrSrcVSubSample));
 

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