Fixes: left shift of negative value -1
Fixes: Ticket8270
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
libavfilter/vf_mestimate.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavfilter/vf_mestimate.c b/libavfilter/vf_mestimate.c
index daf7fde95f..f1935244c1 100644
--- a/libavfilter/vf_mestimate.c
+++ b/libavfilter/vf_mestimate.c
@@ -100,6 +100,9 @@ static int config_input(AVFilterLink *inlink)
s->b_height = inlink->h >> s->log2_mb_size;
s->b_count = s->b_width * s->b_height;
+ if (s->b_count == 0)
+ return AVERROR(EINVAL);
+
for (i = 0; i < 3; i++) {
s->mv_table[i] = av_mallocz_array(s->b_count, sizeof(*s->mv_table[0]));
if (!s->mv_table[i])
--
2.17.1
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