ffmpeg | branch: release/3.4 | Paul B Mahol <one...@gmail.com> | Tue Oct 15 
16:31:15 2019 +0200| [cde751ce49e38979626d7c31ffadc57df3d5c518] | committer: 
Michael Niedermayer

avfilter/vf_avgblur: fix heap-buffer overflow

Fixes #8274

(cherry picked from commit f069a9c2a65bc20c3462127623127df6dfd06c5b)
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cde751ce49e38979626d7c31ffadc57df3d5c518
---

 libavfilter/vf_avgblur.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/vf_avgblur.c b/libavfilter/vf_avgblur.c
index afd4a6ab79..3e268bb6ee 100644
--- a/libavfilter/vf_avgblur.c
+++ b/libavfilter/vf_avgblur.c
@@ -149,7 +149,7 @@ static int filter_vertically_##name(AVFilterContext *ctx, 
void *arg, int jobnr,
                                                                                
               \
         src = s->buffer + x;                                                   
               \
         ptr = buffer + x;                                                      
               \
-        for (i = 0; i <= radius; i++) {                                        
               \
+        for (i = 0; i + radius < height && i <= radius; i++) {                 
               \
             acc += src[(i + radius) * width];                                  
               \
             count++;                                                           
               \
             ptr[i * linesize] = acc / count;                                   
               \

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