// SPDX-License-Identifier: GPL-2.0
/* Converted from tools/testing/selftests/bpf/verifier/helper_packet_access.c */
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__uint(max_entries, 1);
__type(key, long long);
__type(value, long long);
} map_hash_8b SEC(".maps");
SEC("xdp")
__description("helper access to packet: test1, valid packet_ptr range")
__success __retval(0)
__naked void test1_valid_packet_ptr_range(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data]); \
r3 = *(u32*)(r1 + %[xdp_md_data_end]); \
r1 = r2; \
r1 += 8; \
if r1 > r3 goto l0_%=; \
r1 = %[map_hash_8b] ll; \
r3 = r2; \
r4 = 0; \
call %[bpf_map_update_elem]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_map_update_elem),
__imm_addr(map_hash_8b),
__imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_end, offsetof(struct xdp_md, data_end))
: __clobber_all);
}
SEC("xdp")
__description("helper access to packet: test2, unchecked packet_ptr")
__failure __msg("invalid access to packet")
__naked void packet_test2_unchecked_packet_ptr(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data]); \
r1 = %[map_hash_8b] ll; \
call %[bpf_map_lookup_elem]; \
r0 = 0; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm_addr(map_hash_8b),
__imm_const(xdp_md_data, offsetof(struct xdp_md, data))
: __clobber_all);
}
SEC("xdp")
__description("helper access to packet: test3, variable add")
__success __retval(0)
__naked void to_packet_test3_variable_add(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data]); \
r3 = *(u32*)(r1 + %[xdp_md_data_end]); \
r4 = r2; \
r4 += 8; \
if r4 > r3 goto l0_%=; \
r5 = *(u8*)(r2 + 0); \
r4 = r2; \
r4 += r5; \
r5 = r4; \
r5 += 8; \
if r5 > r3 goto l0_%=; \
r1 = %[map_hash_8b] ll; \
r2 = r4; \
call %[bpf_map_lookup_elem]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm_addr(map_hash_8b),
__imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_end, offsetof(struct xdp_md, data_end))
: __clobber_all);
}
SEC("xdp")
__description("helper access to packet: test4, packet_ptr with bad range")
__failure __msg("invalid access to packet")
__naked void packet_ptr_with_bad_range_1(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data]); \
r3 = *(u32*)(r1 + %[xdp_md_data_end]); \
r4 = r2; \
r4 += 4; \
if r4 > r3 goto l0_%=; \
r0 = 0; \
exit; \
l0_%=: r1 = %[map_hash_8b] ll; \
call %[bpf_map_lookup_elem]; \
r0 = 0; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm_addr(map_hash_8b),
__imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_end, offsetof(struct xdp_md, data_end))
: __clobber_all);
}
SEC("xdp")
__description("helper access to packet: test5, packet_ptr with too short range")
__failure __msg("invalid access to packet")
__naked void ptr_with_too_short_range_1(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data]); \
r3 = *(u32*)(r1 + %[xdp_md_data_end]); \
r2 += 1; \
r4 = r2; \
r4 += 7; \
if r4 > r3 goto l0_%=; \
r1 = %[map_hash_8b] ll; \
call %[bpf_map_lookup_elem]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm_addr(map_hash_8b),
__imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_end, offsetof(struct xdp_md, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test6, cls valid packet_ptr range")
__success __retval(0)
__naked void cls_valid_packet_ptr_range(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[__sk_buff_data]); \
r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r1 = r2; \
r1 += 8; \
if r1 > r3 goto l0_%=; \
r1 = %[map_hash_8b] ll; \
r3 = r2; \
r4 = 0; \
call %[bpf_map_update_elem]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_map_update_elem),
__imm_addr(map_hash_8b),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test7, cls unchecked packet_ptr")
__failure __msg("invalid access to packet")
__naked void test7_cls_unchecked_packet_ptr(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[__sk_buff_data]); \
r1 = %[map_hash_8b] ll; \
call %[bpf_map_lookup_elem]; \
r0 = 0; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm_addr(map_hash_8b),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test8, cls variable add")
__success __retval(0)
__naked void packet_test8_cls_variable_add(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[__sk_buff_data]); \
r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r4 = r2; \
r4 += 8; \
if r4 > r3 goto l0_%=; \
r5 = *(u8*)(r2 + 0); \
r4 = r2; \
r4 += r5; \
r5 = r4; \
r5 += 8; \
if r5 > r3 goto l0_%=; \
r1 = %[map_hash_8b] ll; \
r2 = r4; \
call %[bpf_map_lookup_elem]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm_addr(map_hash_8b),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test9, cls packet_ptr with bad range")
__failure __msg("invalid access to packet")
__naked void packet_ptr_with_bad_range_2(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[__sk_buff_data]); \
r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r4 = r2; \
r4 += 4; \
if r4 > r3 goto l0_%=; \
r0 = 0; \
exit; \
l0_%=: r1 = %[map_hash_8b] ll; \
call %[bpf_map_lookup_elem]; \
r0 = 0; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm_addr(map_hash_8b),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test10, cls packet_ptr with too short range")
__failure __msg("invalid access to packet")
__naked void ptr_with_too_short_range_2(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[__sk_buff_data]); \
r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r2 += 1; \
r4 = r2; \
r4 += 7; \
if r4 > r3 goto l0_%=; \
r1 = %[map_hash_8b] ll; \
call %[bpf_map_lookup_elem]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm_addr(map_hash_8b),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test11, cls unsuitable helper 1")
__failure __msg("helper access to the packet")
__naked void test11_cls_unsuitable_helper_1(void)
{
asm volatile (" \
r6 = *(u32*)(r1 + %[__sk_buff_data]); \
r7 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r6 += 1; \
r3 = r6; \
r3 += 7; \
if r3 > r7 goto l0_%=; \
r2 = 0; \
r4 = 42; \
r5 = 0; \
call %[bpf_skb_store_bytes]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_skb_store_bytes),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test12, cls unsuitable helper 2")
__failure __msg("helper access to the packet")
__naked void test12_cls_unsuitable_helper_2(void)
{
asm volatile (" \
r6 = *(u32*)(r1 + %[__sk_buff_data]); \
r7 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r3 = r6; \
r6 += 8; \
if r6 > r7 goto l0_%=; \
r2 = 0; \
r4 = 4; \
call %[bpf_skb_load_bytes]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_skb_load_bytes),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test13, cls helper ok")
__success __retval(0)
__naked void packet_test13_cls_helper_ok(void)
{
asm volatile (" \
r6 = *(u32*)(r1 + %[__sk_buff_data]); \
r7 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r6 += 1; \
r1 = r6; \
r1 += 7; \
if r1 > r7 goto l0_%=; \
r1 = r6; \
r2 = 4; \
r3 = 0; \
r4 = 0; \
r5 = 0; \
call %[bpf_csum_diff]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_csum_diff),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test14, cls helper ok sub")
__success __retval(0)
__naked void test14_cls_helper_ok_sub(void)
{
asm volatile (" \
r6 = *(u32*)(r1 + %[__sk_buff_data]); \
r7 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r6 += 1; \
r1 = r6; \
r1 += 7; \
if r1 > r7 goto l0_%=; \
r1 -= 4; \
r2 = 4; \
r3 = 0; \
r4 = 0; \
r5 = 0; \
call %[bpf_csum_diff]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_csum_diff),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test15, cls helper fail sub")
__failure __msg("invalid access to packet")
__naked void test15_cls_helper_fail_sub(void)
{
asm volatile (" \
r6 = *(u32*)(r1 + %[__sk_buff_data]); \
r7 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r6 += 1; \
r1 = r6; \
r1 += 7; \
if r1 > r7 goto l0_%=; \
r1 -= 12; \
r2 = 4; \
r3 = 0; \
r4 = 0; \
r5 = 0; \
call %[bpf_csum_diff]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_csum_diff),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test16, cls helper fail range 1")
__failure __msg("invalid access to packet")
__naked void cls_helper_fail_range_1(void)
{
asm volatile (" \
r6 = *(u32*)(r1 + %[__sk_buff_data]); \
r7 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r6 += 1; \
r1 = r6; \
r1 += 7; \
if r1 > r7 goto l0_%=; \
r1 = r6; \
r2 = 8; \
r3 = 0; \
r4 = 0; \
r5 = 0; \
call %[bpf_csum_diff]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_csum_diff),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test17, cls helper fail range 2")
__failure __msg("R2 min value is negative")
__naked void cls_helper_fail_range_2(void)
{
asm volatile (" \
r6 = *(u32*)(r1 + %[__sk_buff_data]); \
r7 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r6 += 1; \
r1 = r6; \
r1 += 7; \
if r1 > r7 goto l0_%=; \
r1 = r6; \
r2 = -9; \
r3 = 0; \
r4 = 0; \
r5 = 0; \
call %[bpf_csum_diff]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_csum_diff),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test18, cls helper fail range 3")
__failure __msg("R2 min value is negative")
__naked void cls_helper_fail_range_3(void)
{
asm volatile (" \
r6 = *(u32*)(r1 + %[__sk_buff_data]); \
r7 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r6 += 1; \
r1 = r6; \
r1 += 7; \
if r1 > r7 goto l0_%=; \
r1 = r6; \
r2 = %[__imm_0]; \
r3 = 0; \
r4 = 0; \
r5 = 0; \
call %[bpf_csum_diff]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_csum_diff),
__imm_const(__imm_0, ~0),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test19, cls helper range zero")
__success __retval(0)
__naked void test19_cls_helper_range_zero(void)
{
asm volatile (" \
r6 = *(u32*)(r1 + %[__sk_buff_data]); \
r7 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r6 += 1; \
r1 = r6; \
r1 += 7; \
if r1 > r7 goto l0_%=; \
r1 = r6; \
r2 = 0; \
r3 = 0; \
r4 = 0; \
r5 = 0; \
call %[bpf_csum_diff]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_csum_diff),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test20, pkt end as input")
__failure __msg("R1 type=pkt_end expected=fp")
__naked void test20_pkt_end_as_input(void)
{
asm volatile (" \
r6 = *(u32*)(r1 + %[__sk_buff_data]); \
r7 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r6 += 1; \
r1 = r6; \
r1 += 7; \
if r1 > r7 goto l0_%=; \
r1 = r7; \
r2 = 4; \
r3 = 0; \
r4 = 0; \
r5 = 0; \
call %[bpf_csum_diff]; \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_csum_diff),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
SEC("tc")
__description("helper access to packet: test21, wrong reg")
__failure __msg("invalid access to packet")
__naked void to_packet_test21_wrong_reg(void)
{
asm volatile (" \
r6 = *(u32*)(r1 + %[__sk_buff_data]); \
r7 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r6 += 1; \
r1 = r6; \
r1 += 7; \
if r1 > r7 goto l0_%=; \
r2 = 4; \
r3 = 0; \
r4 = 0; \
r5 = 0; \
call %[bpf_csum_diff]; \
r0 = 0; \
l0_%=: exit; \
" :
: __imm(bpf_csum_diff),
__imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end))
: __clobber_all);
}
char _license[] SEC("license") = "GPL";
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