diff --git a/libavfilter/vsrc_mandelbrot.c b/libavfilter/vsrc_mandelbrot.c
index 6ad108151f..11650e36f7 100644
--- a/libavfilter/vsrc_mandelbrot.c
+++ b/libavfilter/vsrc_mandelbrot.c
@@ -134,6 +134,9 @@ static av_cold int init(AVFilterContext *ctx)
     s-> next_cache= av_malloc_array(s->cache_allocated, sizeof(*s-> next_cache));
     s-> zyklus    = av_malloc_array(s->maxiter + 16, sizeof(*s->zyklus));
 
+    if (!s->point_cache || !s->next_cache || !s->zyklus)
+        return AVERROR(ENOMEM);
+
     return 0;
 }