| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | /* Copyright (c) 2021 Facebook */ |
| 3 | |
| 4 | #include <linux/bpf.h> |
| 5 | #include <bpf/bpf_helpers.h> |
| 6 | |
| 7 | int a[4]; |
| 8 | const volatile int off = 4000; |
| 9 | |
| 10 | SEC("raw_tp/sys_enter") |
| 11 | int good_prog(const void *ctx) |
| 12 | { |
| 13 | a[0] = (int)(long)ctx; |
| 14 | return a[1]; |
| 15 | } |
| 16 | |
| 17 | SEC("raw_tp/sys_enter") |
| 18 | int bad_prog(const void *ctx) |
| 19 | { |
| 20 | /* out of bounds access */ |
| 21 | return a[off]; |
| 22 | } |
| 23 | |
| 24 | char _license[] SEC("license") = "GPL"; |
| 25 |