Quelle  verifier_const_or.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
/* Converted from tools/testing/selftests/bpf/verifier/const_or.c */

#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"

SEC("tracepoint")
__description("constant register |= constant should keep constant type")
__success
__naked void constant_should_keep_constant_type(void)
{
 asm volatile (" \
 r1 = r10;     \
 r1 += -48;     \
 r2 = 34;     \
 r2 |= 13;     \
 r3 = 0;      \
 call %[bpf_probe_read_kernel];   \
 exit;      \
" :
 : __imm(bpf_probe_read_kernel)
 : __clobber_all);
}

SEC("tracepoint")
__description("constant register |= constant should not bypass stack boundary checks")
__failure __msg("invalid write to stack R1 off=-48 size=58")
__naked void not_bypass_stack_boundary_checks_1(void)
{
 asm volatile (" \
 r1 = r10;     \
 r1 += -48;     \
 r2 = 34;     \
 r2 |= 24;     \
 r3 = 0;      \
 call %[bpf_probe_read_kernel];   \
 exit;      \
" :
 : __imm(bpf_probe_read_kernel)
 : __clobber_all);
}

SEC("tracepoint")
__description("constant register |= constant register should keep constant type")
__success
__naked void register_should_keep_constant_type(void)
{
 asm volatile (" \
 r1 = r10;     \
 r1 += -48;     \
 r2 = 34;     \
 r4 = 13;     \
 r2 |= r4;     \
 r3 = 0;      \
 call %[bpf_probe_read_kernel];   \
 exit;      \
" :
 : __imm(bpf_probe_read_kernel)
 : __clobber_all);
}

SEC("tracepoint")
__description("constant register |= constant register should not bypass stack boundary checks")
__failure __msg("invalid write to stack R1 off=-48 size=58")
__naked void not_bypass_stack_boundary_checks_2(void)
{
 asm volatile (" \
 r1 = r10;     \
 r1 += -48;     \
 r2 = 34;     \
 r4 = 24;     \
 r2 |= r4;     \
 r3 = 0;      \
 call %[bpf_probe_read_kernel];   \
 exit;      \
" :
 : __imm(bpf_probe_read_kernel)
 : __clobber_all);
}

char _license[] SEC("license") = "GPL";