diff --git a/net/core/filter.c b/net/core/filter.c
index d14401193b01..f04982d79d72 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -4135,7 +4135,7 @@ static const struct bpf_func_proto bpf_xdp_store_bytes_proto = {
 	.ret_type	= RET_INTEGER,
 	.arg1_type	= ARG_PTR_TO_CTX,
 	.arg2_type	= ARG_ANYTHING,
-	.arg3_type	= ARG_PTR_TO_UNINIT_MEM,
+	.arg3_type	= ARG_PTR_TO_MEM | MEM_RDONLY,
 	.arg4_type	= ARG_CONST_SIZE,
 };