1 files changed, 69 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/find_vma.c b/tools/testing/selftests/bpf/progs/find_vma.c
new file mode 100644
index 000000000000..38034fb82530
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/find_vma.c
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2021 Facebook */
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+char _license[] SEC("license") = "GPL";
+
+struct callback_ctx {
+	int dummy;
+};
+
+#define VM_EXEC		0x00000004
+#define DNAME_INLINE_LEN 32
+
+pid_t target_pid = 0;
+char d_iname[DNAME_INLINE_LEN] = {0};
+__u32 found_vm_exec = 0;
+__u64 addr = 0;
+int find_zero_ret = -1;
+int find_addr_ret = -1;
+
+static long check_vma(struct task_struct *task, struct vm_area_struct *vma,
+		      struct callback_ctx *data)
+{
+	if (vma->vm_file)
+		bpf_probe_read_kernel_str(d_iname, DNAME_INLINE_LEN - 1,
+					  vma->vm_file->f_path.dentry->d_iname);
+
+	/* check for VM_EXEC */
+	if (vma->vm_flags & VM_EXEC)
+		found_vm_exec = 1;
+
+	return 0;
+}
+
+SEC("raw_tp/sys_enter")
+int handle_getpid(void)
+{
+	struct task_struct *task = bpf_get_current_task_btf();
+	struct callback_ctx data = {};
+
+	if (task->pid != target_pid)
+		return 0;
+
+	find_addr_ret = bpf_find_vma(task, addr, check_vma, &data, 0);
+
+	/* this should return -ENOENT */
+	find_zero_ret = bpf_find_vma(task, 0, check_vma, &data, 0);
+	return 0;
+}
+
+SEC("perf_event")
+int handle_pe(void)
+{
+	struct task_struct *task = bpf_get_current_task_btf();
+	struct callback_ctx data = {};
+
+	if (task->pid != target_pid)
+		return 0;
+
+	find_addr_ret = bpf_find_vma(task, addr, check_vma, &data, 0);
+
+	/* In NMI, this should return -EBUSY, as the previous call is using
+	 * the irq_work.
+	 */
+	find_zero_ret = bpf_find_vma(task, 0, check_vma, &data, 0);
+	return 0;
+}