1 files changed, 42 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/uptr_update_failure.c b/tools/testing/selftests/bpf/progs/uptr_update_failure.c
new file mode 100644
index 000000000000..86c3bb954abc
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/uptr_update_failure.c
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
+
+#include <vmlinux.h>
+#include <bpf/bpf_helpers.h>
+#include "uptr_test_common.h"
+
+struct {
+	__uint(type, BPF_MAP_TYPE_TASK_STORAGE);
+	__uint(map_flags, BPF_F_NO_PREALLOC);
+	__type(key, int);
+	__type(value, struct value_lock_type);
+} datamap SEC(".maps");
+
+/* load test only. not used */
+SEC("syscall")
+int not_used(void *ctx)
+{
+	struct value_lock_type *ptr;
+	struct task_struct *task;
+	struct user_data *udata;
+
+	task = bpf_get_current_task_btf();
+	ptr = bpf_task_storage_get(&datamap, task, 0, 0);
+	if (!ptr)
+		return 0;
+
+	bpf_spin_lock(&ptr->lock);
+
+	udata = ptr->udata;
+	if (!udata) {
+		bpf_spin_unlock(&ptr->lock);
+		return 0;
+	}
+	udata->result = MAGIC_VALUE + udata->a + udata->b;
+
+	bpf_spin_unlock(&ptr->lock);
+
+	return 0;
+}
+
+char _license[] SEC("license") = "GPL";