1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
// SPDX-License-Identifier: GPL-2.0
/* Converted from tools/testing/selftests/bpf/verifier/cgroup_skb.c */
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
SEC("cgroup/skb")
__description("direct packet read test#1 for CGROUP_SKB")
__success __failure_unpriv
__msg_unpriv("invalid bpf_context access off=76 size=4")
__retval(0)
__naked void test_1_for_cgroup_skb(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[__sk_buff_data]); \
r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \
r4 = *(u32*)(r1 + %[__sk_buff_len]); \
r5 = *(u32*)(r1 + %[__sk_buff_pkt_type]); \
r6 = *(u32*)(r1 + %[__sk_buff_mark]); \
*(u32*)(r1 + %[__sk_buff_mark]) = r6; \
r7 = *(u32*)(r1 + %[__sk_buff_queue_mapping]); \
r8 = *(u32*)(r1 + %[__sk_buff_protocol]); \
r9 = *(u32*)(r1 + %[__sk_buff_vlan_present]); \
r0 = r2; \
r0 += 8; \
if r0 > r3 goto l0_%=; \
r0 = *(u8*)(r2 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)),
__imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end)),
__imm_const(__sk_buff_len, offsetof(struct __sk_buff, len)),
__imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark)),
__imm_const(__sk_buff_pkt_type, offsetof(struct __sk_buff, pkt_type)),
__imm_const(__sk_buff_protocol, offsetof(struct __sk_buff, protocol)),
__imm_const(__sk_buff_queue_mapping, offsetof(struct __sk_buff, queue_mapping)),
__imm_const(__sk_buff_vlan_present, offsetof(struct __sk_buff, vlan_present))
: __clobber_all);
}
SEC("cgroup/skb")
__description("direct packet read test#2 for CGROUP_SKB")
__success __success_unpriv __retval(0)
__naked void test_2_for_cgroup_skb(void)
{
asm volatile (" \
r4 = *(u32*)(r1 + %[__sk_buff_vlan_tci]); \
r5 = *(u32*)(r1 + %[__sk_buff_vlan_proto]); \
r6 = *(u32*)(r1 + %[__sk_buff_priority]); \
*(u32*)(r1 + %[__sk_buff_priority]) = r6; \
r7 = *(u32*)(r1 + %[__sk_buff_ingress_ifindex]);\
r8 = *(u32*)(r1 + %[__sk_buff_tc_index]); \
r9 = *(u32*)(r1 + %[__sk_buff_hash]); \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_hash, offsetof(struct __sk_buff, hash)),
__imm_const(__sk_buff_ingress_ifindex, offsetof(struct __sk_buff, ingress_ifindex)),
__imm_const(__sk_buff_priority, offsetof(struct __sk_buff, priority)),
__imm_const(__sk_buff_tc_index, offsetof(struct __sk_buff, tc_index)),
__imm_const(__sk_buff_vlan_proto, offsetof(struct __sk_buff, vlan_proto)),
__imm_const(__sk_buff_vlan_tci, offsetof(struct __sk_buff, vlan_tci))
: __clobber_all);
}
SEC("cgroup/skb")
__description("direct packet read test#3 for CGROUP_SKB")
__success __success_unpriv __retval(0)
__naked void test_3_for_cgroup_skb(void)
{
asm volatile (" \
r4 = *(u32*)(r1 + %[__sk_buff_cb_0]); \
r5 = *(u32*)(r1 + %[__sk_buff_cb_1]); \
r6 = *(u32*)(r1 + %[__sk_buff_cb_2]); \
r7 = *(u32*)(r1 + %[__sk_buff_cb_3]); \
r8 = *(u32*)(r1 + %[__sk_buff_cb_4]); \
r9 = *(u32*)(r1 + %[__sk_buff_napi_id]); \
*(u32*)(r1 + %[__sk_buff_cb_0]) = r4; \
*(u32*)(r1 + %[__sk_buff_cb_1]) = r5; \
*(u32*)(r1 + %[__sk_buff_cb_2]) = r6; \
*(u32*)(r1 + %[__sk_buff_cb_3]) = r7; \
*(u32*)(r1 + %[__sk_buff_cb_4]) = r8; \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_cb_0, offsetof(struct __sk_buff, cb[0])),
__imm_const(__sk_buff_cb_1, offsetof(struct __sk_buff, cb[1])),
__imm_const(__sk_buff_cb_2, offsetof(struct __sk_buff, cb[2])),
__imm_const(__sk_buff_cb_3, offsetof(struct __sk_buff, cb[3])),
__imm_const(__sk_buff_cb_4, offsetof(struct __sk_buff, cb[4])),
__imm_const(__sk_buff_napi_id, offsetof(struct __sk_buff, napi_id))
: __clobber_all);
}
SEC("cgroup/skb")
__description("direct packet read test#4 for CGROUP_SKB")
__success __success_unpriv __retval(0)
__naked void test_4_for_cgroup_skb(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[__sk_buff_family]); \
r3 = *(u32*)(r1 + %[__sk_buff_remote_ip4]); \
r4 = *(u32*)(r1 + %[__sk_buff_local_ip4]); \
r5 = *(u32*)(r1 + %[__sk_buff_remote_ip6_0]); \
r5 = *(u32*)(r1 + %[__sk_buff_remote_ip6_1]); \
r5 = *(u32*)(r1 + %[__sk_buff_remote_ip6_2]); \
r5 = *(u32*)(r1 + %[__sk_buff_remote_ip6_3]); \
r6 = *(u32*)(r1 + %[__sk_buff_local_ip6_0]); \
r6 = *(u32*)(r1 + %[__sk_buff_local_ip6_1]); \
r6 = *(u32*)(r1 + %[__sk_buff_local_ip6_2]); \
r6 = *(u32*)(r1 + %[__sk_buff_local_ip6_3]); \
r7 = *(u32*)(r1 + %[__sk_buff_remote_port]); \
r8 = *(u32*)(r1 + %[__sk_buff_local_port]); \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_family, offsetof(struct __sk_buff, family)),
__imm_const(__sk_buff_local_ip4, offsetof(struct __sk_buff, local_ip4)),
__imm_const(__sk_buff_local_ip6_0, offsetof(struct __sk_buff, local_ip6[0])),
__imm_const(__sk_buff_local_ip6_1, offsetof(struct __sk_buff, local_ip6[1])),
__imm_const(__sk_buff_local_ip6_2, offsetof(struct __sk_buff, local_ip6[2])),
__imm_const(__sk_buff_local_ip6_3, offsetof(struct __sk_buff, local_ip6[3])),
__imm_const(__sk_buff_local_port, offsetof(struct __sk_buff, local_port)),
__imm_const(__sk_buff_remote_ip4, offsetof(struct __sk_buff, remote_ip4)),
__imm_const(__sk_buff_remote_ip6_0, offsetof(struct __sk_buff, remote_ip6[0])),
__imm_const(__sk_buff_remote_ip6_1, offsetof(struct __sk_buff, remote_ip6[1])),
__imm_const(__sk_buff_remote_ip6_2, offsetof(struct __sk_buff, remote_ip6[2])),
__imm_const(__sk_buff_remote_ip6_3, offsetof(struct __sk_buff, remote_ip6[3])),
__imm_const(__sk_buff_remote_port, offsetof(struct __sk_buff, remote_port))
: __clobber_all);
}
SEC("cgroup/skb")
__description("invalid access of tc_classid for CGROUP_SKB")
__failure __msg("invalid bpf_context access")
__failure_unpriv
__naked void tc_classid_for_cgroup_skb(void)
{
asm volatile (" \
r0 = *(u32*)(r1 + %[__sk_buff_tc_classid]); \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_tc_classid, offsetof(struct __sk_buff, tc_classid))
: __clobber_all);
}
SEC("cgroup/skb")
__description("invalid access of data_meta for CGROUP_SKB")
__failure __msg("invalid bpf_context access")
__failure_unpriv
__naked void data_meta_for_cgroup_skb(void)
{
asm volatile (" \
r0 = *(u32*)(r1 + %[__sk_buff_data_meta]); \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_data_meta, offsetof(struct __sk_buff, data_meta))
: __clobber_all);
}
SEC("cgroup/skb")
__description("invalid access of flow_keys for CGROUP_SKB")
__failure __msg("invalid bpf_context access")
__failure_unpriv
__naked void flow_keys_for_cgroup_skb(void)
{
asm volatile (" \
r0 = *(u32*)(r1 + %[__sk_buff_flow_keys]); \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_flow_keys, offsetof(struct __sk_buff, flow_keys))
: __clobber_all);
}
SEC("cgroup/skb")
__description("invalid write access to napi_id for CGROUP_SKB")
__failure __msg("invalid bpf_context access")
__failure_unpriv
__naked void napi_id_for_cgroup_skb(void)
{
asm volatile (" \
r9 = *(u32*)(r1 + %[__sk_buff_napi_id]); \
*(u32*)(r1 + %[__sk_buff_napi_id]) = r9; \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_napi_id, offsetof(struct __sk_buff, napi_id))
: __clobber_all);
}
SEC("cgroup/skb")
__description("write tstamp from CGROUP_SKB")
__success __failure_unpriv
__msg_unpriv("invalid bpf_context access off=152 size=8")
__retval(0)
__naked void write_tstamp_from_cgroup_skb(void)
{
asm volatile (" \
r0 = 0; \
*(u64*)(r1 + %[__sk_buff_tstamp]) = r0; \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_tstamp, offsetof(struct __sk_buff, tstamp))
: __clobber_all);
}
SEC("cgroup/skb")
__description("read tstamp from CGROUP_SKB")
__success __success_unpriv __retval(0)
__naked void read_tstamp_from_cgroup_skb(void)
{
asm volatile (" \
r0 = *(u64*)(r1 + %[__sk_buff_tstamp]); \
r0 = 0; \
exit; \
" :
: __imm_const(__sk_buff_tstamp, offsetof(struct __sk_buff, tstamp))
: __clobber_all);
}
char _license[] SEC("license") = "GPL";
|
