| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | /* Converted from tools/testing/selftests/bpf/verifier/uninit.c */ |
| 3 | |
| 4 | #include <linux/bpf.h> |
| 5 | #include <bpf/bpf_helpers.h> |
| 6 | #include "../../../include/linux/filter.h" |
| 7 | #include "bpf_misc.h" |
| 8 | |
| 9 | SEC("socket") |
| 10 | __description("read uninitialized register") |
| 11 | __failure __msg("R2 !read_ok") |
| 12 | __failure_unpriv |
| 13 | __naked void read_uninitialized_register(void) |
| 14 | { |
| 15 | asm volatile (" \ |
| 16 | r0 = r2; \ |
| 17 | exit; \ |
| 18 | "::: __clobber_all); |
| 19 | } |
| 20 | |
| 21 | SEC("socket") |
| 22 | __description("read invalid register") |
| 23 | __failure __msg("R15 is invalid") |
| 24 | __failure_unpriv |
| 25 | __naked void read_invalid_register(void) |
| 26 | { |
| 27 | asm volatile (" \ |
| 28 | .8byte %[mov64_reg]; \ |
| 29 | exit; \ |
| 30 | ": |
| 31 | : __imm_insn(mov64_reg, BPF_MOV64_REG(BPF_REG_0, -1)) |
| 32 | : __clobber_all); |
| 33 | } |
| 34 | |
| 35 | SEC("socket") |
| 36 | __description("program doesn't init R0 before exit") |
| 37 | __failure __msg("R0 !read_ok") |
| 38 | __failure_unpriv |
| 39 | __naked void t_init_r0_before_exit(void) |
| 40 | { |
| 41 | asm volatile (" \ |
| 42 | r2 = r1; \ |
| 43 | exit; \ |
| 44 | "::: __clobber_all); |
| 45 | } |
| 46 | |
| 47 | SEC("socket") |
| 48 | __description("program doesn't init R0 before exit in all branches") |
| 49 | __failure __msg("R0 !read_ok") |
| 50 | __msg_unpriv("R1 pointer comparison") |
| 51 | __naked void before_exit_in_all_branches(void) |
| 52 | { |
| 53 | asm volatile (" \ |
| 54 | if r1 >= 0 goto l0_%=; \ |
| 55 | r0 = 1; \ |
| 56 | r0 += 2; \ |
| 57 | l0_%=: exit; \ |
| 58 | "::: __clobber_all); |
| 59 | } |
| 60 | |
| 61 | char _license[] SEC("license") = "GPL"; |
| 62 |