[FFmpeg-cvslog] avfilter/vf_avgblur: fix heap-buffer overflow
Paul B Mahol
git at videolan.org
Tue Sep 14 00:16:29 EEST 2021
ffmpeg | branch: release/4.1 | Paul B Mahol <onemda at gmail.com> | Tue Oct 15 16:31:15 2019 +0200| [01f3824f6c46ef19025059752a4381daa2443097] | committer: James Almer
avfilter/vf_avgblur: fix heap-buffer overflow
Fixes #8274
(cherry picked from commit f069a9c2a65bc20c3462127623127df6dfd06c5b)
Signed-off-by: James Almer <jamrial at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=01f3824f6c46ef19025059752a4381daa2443097
---
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 c7b88427fd..b813237258 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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