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Diffstat (limited to 'tools/testing/selftests/bpf/progs/bprm_opts.c')
-rw-r--r--tools/testing/selftests/bpf/progs/bprm_opts.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/bprm_opts.c b/tools/testing/selftests/bpf/progs/bprm_opts.c
new file mode 100644
index 000000000000..5bfef2887e70
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/bprm_opts.c
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Copyright 2020 Google LLC.
+ */
+
+#include "vmlinux.h"
+#include <errno.h>
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+char _license[] SEC("license") = "GPL";
+
+struct {
+ __uint(type, BPF_MAP_TYPE_TASK_STORAGE);
+ __uint(map_flags, BPF_F_NO_PREALLOC);
+ __type(key, int);
+ __type(value, int);
+} secure_exec_task_map SEC(".maps");
+
+SEC("lsm/bprm_creds_for_exec")
+int BPF_PROG(secure_exec, struct linux_binprm *bprm)
+{
+ int *secureexec;
+
+ secureexec = bpf_task_storage_get(&secure_exec_task_map,
+ bpf_get_current_task_btf(), 0,
+ BPF_LOCAL_STORAGE_GET_F_CREATE);
+
+ if (secureexec && *secureexec)
+ bpf_bprm_opts_set(bprm, BPF_F_BPRM_SECUREEXEC);
+
+ return 0;
+}