diff --git a/net/dns_resolver/dns_key.c b/net/dns_resolver/dns_key.c
index c42ddd85ff1f..891287a86979 100644
--- a/net/dns_resolver/dns_key.c
+++ b/net/dns_resolver/dns_key.c
@@ -215,7 +215,7 @@ dns_resolver_preparse(struct key_preparsed_payload *prep)
 	kdebug("store result");
 	prep->quotalen = result_len;
 
-	upayload = kmalloc(sizeof(*upayload) + result_len + 1, GFP_KERNEL);
+	upayload = kmalloc_flex(*upayload, data, result_len + 1);
 	if (!upayload) {
 		kleave(" = -ENOMEM");
 		return -ENOMEM;