1 files changed, 4 insertions, 0 deletions
diff --git a/alloc.c b/alloc.c
index 7fb6b35..0902286 100644
--- a/alloc.c
+++ b/alloc.c
@@ -68,6 +68,10 @@ void *hi_malloc(size_t size) {
 }
 
 void *hi_calloc(size_t nmemb, size_t size) {
+    /* Overflow check as the user can specify any arbitrary allocator */
+    if (SIZE_MAX / size < nmemb)
+        return NULL;
+
     return hiredisAllocFns.callocFn(nmemb, size);
 }