diff --git a/tools/testing/selftests/bpf/progs/verifier_global_ptr_args.c b/tools/testing/selftests/bpf/progs/verifier_global_ptr_args.c
index ea273e152209..0bdeb7bc4687 100644
--- a/tools/testing/selftests/bpf/progs/verifier_global_ptr_args.c
+++ b/tools/testing/selftests/bpf/progs/verifier_global_ptr_args.c
@@ -287,6 +287,25 @@ int trusted_to_untrusted_mem(void *ctx)
 	return subprog_void_untrusted(bpf_get_current_task_btf());
 }
 
+__weak int subprog_write_mem_arg(int *p)
+{
+	if (!p)
+		return 0;
+
+	*p = 42;
+	return 0;
+}
+
+SEC("?tp_btf/task_newtask")
+__failure
+__msg("only read is supported")
+int trusted_btf_field_to_writable_mem(void *ctx)
+{
+	struct task_struct *task = bpf_get_current_task_btf();
+
+	return subprog_write_mem_arg(&task->prio);
+}
+
 SEC("tp_btf/sys_enter")
 __success
 int anything_to_untrusted_mem(void *ctx)