1 files changed, 63 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/task_ls_uptr.c b/tools/testing/selftests/bpf/progs/task_ls_uptr.c
new file mode 100644
index 000000000000..ddbe11b46eef
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/task_ls_uptr.c
@@ -0,0 +1,63 @@
+// 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 task_struct *bpf_task_from_pid(s32 pid) __ksym;
+void bpf_task_release(struct task_struct *p) __ksym;
+void bpf_cgroup_release(struct cgroup *cgrp) __ksym;
+
+struct {
+	__uint(type, BPF_MAP_TYPE_TASK_STORAGE);
+	__uint(map_flags, BPF_F_NO_PREALLOC);
+	__type(key, int);
+	__type(value, struct value_type);
+} datamap SEC(".maps");
+
+pid_t target_pid = 0;
+pid_t parent_pid = 0;
+
+SEC("tp_btf/sys_enter")
+int on_enter(__u64 *ctx)
+{
+	struct task_struct *task, *data_task;
+	struct value_type *ptr;
+	struct user_data *udata;
+	struct cgroup *cgrp;
+
+	task = bpf_get_current_task_btf();
+	if (task->pid != target_pid)
+		return 0;
+
+	data_task = bpf_task_from_pid(parent_pid);
+	if (!data_task)
+		return 0;
+
+	ptr = bpf_task_storage_get(&datamap, data_task, 0, 0);
+	bpf_task_release(data_task);
+	if (!ptr)
+		return 0;
+
+	cgrp = bpf_kptr_xchg(&ptr->cgrp, NULL);
+	if (cgrp) {
+		int lvl = cgrp->level;
+
+		bpf_cgroup_release(cgrp);
+		return lvl;
+	}
+
+	udata = ptr->udata;
+	if (!udata || udata->result)
+		return 0;
+	udata->result = MAGIC_VALUE + udata->a + udata->b;
+
+	udata = ptr->nested.udata;
+	if (udata && !udata->nested_result)
+		udata->nested_result = udata->result;
+
+	return 0;
+}
+
+char _license[] SEC("license") = "GPL";