// SPDX-License-Identifier: GPL-2.0 /* Converted from tools/testing/selftests/bpf/verifier/uninit.c */ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include "../../../include/linux/filter.h" #include "bpf_misc.h" SEC("socket") __description("read uninitialized register") __failure __msg("R2 !read_ok") __failure_unpriv __naked void read_uninitialized_register(void) { asm volatile (" \ r0 = r2; \ exit; \ " ::: __clobber_all); } SEC("socket") __description("read invalid register") __failure __msg("R15 is invalid") __failure_unpriv __naked void read_invalid_register(void) { asm volatile (" \ .8byte %[mov64_reg]; \ exit; \ " : : __imm_insn(mov64_reg, BPF_MOV64_REG(BPF_REG_0, -1)) : __clobber_all); } SEC("socket") __description("program doesn't init R0 before exit") __failure __msg("R0 !read_ok") __failure_unpriv __naked void t_init_r0_before_exit(void) { asm volatile (" \ r2 = r1; \ exit; \ " ::: __clobber_all); } SEC("socket") __description("program doesn't init R0 before exit in all branches") __failure __msg("R0 !read_ok") __msg_unpriv("R1 pointer comparison") __naked void before_exit_in_all_branches(void) { asm volatile (" \ if r1 >= 0 goto l0_%=; \ r0 = 1; \ r0 += 2; \ l0_%=: exit; \ " ::: __clobber_all); } char _license[] SEC("license") = "GPL";