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1// SPDX-License-Identifier: GPL-2.0
2/* Converted from tools/testing/selftests/bpf/verifier/map_ptr.c */
3
4#include <linux/bpf.h>
5#include <bpf/bpf_helpers.h>
6#include "bpf_misc.h"
7
8#define MAX_ENTRIES 11
9
10struct test_val {
11 unsigned int index;
12 int foo[MAX_ENTRIES];
13};
14
15struct {
16 __uint(type, BPF_MAP_TYPE_ARRAY);
17 __uint(max_entries, 1);
18 __type(key, int);
19 __type(value, struct test_val);
20} map_array_48b SEC(".maps");
21
22struct other_val {
23 long long foo;
24 long long bar;
25};
26
27struct {
28 __uint(type, BPF_MAP_TYPE_HASH);
29 __uint(max_entries, 1);
30 __type(key, long long);
31 __type(value, struct other_val);
32} map_hash_16b SEC(".maps");
33
34SEC("socket")
35__description("bpf_map_ptr: read with negative offset rejected")
36__failure __msg("R1 is bpf_array invalid negative access: off=-8")
37__failure_unpriv
38__msg_unpriv("access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN")
39__naked void read_with_negative_offset_rejected(void)
40{
41 asm volatile (" \
42 r1 = r10; \
43 r1 = %[map_array_48b] ll; \
44 r6 = *(u64*)(r1 - 8); \
45 r0 = 1; \
46 exit; \
47" :
48 : __imm_addr(map_array_48b)
49 : __clobber_all);
50}
51
52SEC("socket")
53__description("bpf_map_ptr: write rejected")
54__failure __msg("only read from bpf_array is supported")
55__failure_unpriv
56__msg_unpriv("access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN")
57__naked void bpf_map_ptr_write_rejected(void)
58{
59 asm volatile (" \
60 r0 = 0; \
61 *(u64*)(r10 - 8) = r0; \
62 r2 = r10; \
63 r2 += -8; \
64 r1 = %[map_array_48b] ll; \
65 *(u64*)(r1 + 0) = r2; \
66 r0 = 1; \
67 exit; \
68" :
69 : __imm_addr(map_array_48b)
70 : __clobber_all);
71}
72
73SEC("socket")
74__description("bpf_map_ptr: read non-existent field rejected")
75__failure
76__msg("cannot access ptr member ops with moff 0 in struct bpf_map with off 1 size 4")
77__failure_unpriv
78__msg_unpriv("access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN")
79__flag(BPF_F_ANY_ALIGNMENT)
80__naked void read_non_existent_field_rejected(void)
81{
82 asm volatile (" \
83 r6 = 0; \
84 r1 = %[map_array_48b] ll; \
85 r6 = *(u32*)(r1 + 1); \
86 r0 = 1; \
87 exit; \
88" :
89 : __imm_addr(map_array_48b)
90 : __clobber_all);
91}
92
93SEC("socket")
94__description("bpf_map_ptr: read ops field accepted")
95__success __failure_unpriv
96__msg_unpriv("access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN")
97__retval(1)
98__naked void ptr_read_ops_field_accepted(void)
99{
100 asm volatile (" \
101 r6 = 0; \
102 r1 = %[map_array_48b] ll; \
103 r6 = *(u64*)(r1 + 0); \
104 r0 = 1; \
105 exit; \
106" :
107 : __imm_addr(map_array_48b)
108 : __clobber_all);
109}
110
111SEC("socket")
112__description("bpf_map_ptr: r = 0, map_ptr = map_ptr + r")
113__success __failure_unpriv
114__msg_unpriv("R1 has pointer with unsupported alu operation")
115__retval(0)
116__naked void map_ptr_map_ptr_r(void)
117{
118 asm volatile (" \
119 r0 = 0; \
120 *(u64*)(r10 - 8) = r0; \
121 r2 = r10; \
122 r2 += -8; \
123 r0 = 0; \
124 r1 = %[map_hash_16b] ll; \
125 r1 += r0; \
126 call %[bpf_map_lookup_elem]; \
127 r0 = 0; \
128 exit; \
129" :
130 : __imm(bpf_map_lookup_elem),
131 __imm_addr(map_hash_16b)
132 : __clobber_all);
133}
134
135SEC("socket")
136__description("bpf_map_ptr: r = 0, r = r + map_ptr")
137__success __failure_unpriv
138__msg_unpriv("R0 has pointer with unsupported alu operation")
139__retval(0)
140__naked void _0_r_r_map_ptr(void)
141{
142 asm volatile (" \
143 r0 = 0; \
144 *(u64*)(r10 - 8) = r0; \
145 r2 = r10; \
146 r2 += -8; \
147 r1 = 0; \
148 r0 = %[map_hash_16b] ll; \
149 r1 += r0; \
150 call %[bpf_map_lookup_elem]; \
151 r0 = 0; \
152 exit; \
153" :
154 : __imm(bpf_map_lookup_elem),
155 __imm_addr(map_hash_16b)
156 : __clobber_all);
157}
158
159char _license[] SEC("license") = "GPL";
1// SPDX-License-Identifier: GPL-2.0
2/* Converted from tools/testing/selftests/bpf/verifier/map_ptr.c */
3
4#include <linux/bpf.h>
5#include <bpf/bpf_helpers.h>
6#include "bpf_misc.h"
7
8#define MAX_ENTRIES 11
9
10struct test_val {
11 unsigned int index;
12 int foo[MAX_ENTRIES];
13};
14
15struct {
16 __uint(type, BPF_MAP_TYPE_ARRAY);
17 __uint(max_entries, 1);
18 __type(key, int);
19 __type(value, struct test_val);
20} map_array_48b SEC(".maps");
21
22struct other_val {
23 long long foo;
24 long long bar;
25};
26
27struct {
28 __uint(type, BPF_MAP_TYPE_HASH);
29 __uint(max_entries, 1);
30 __type(key, long long);
31 __type(value, struct other_val);
32} map_hash_16b SEC(".maps");
33
34SEC("socket")
35__description("bpf_map_ptr: read with negative offset rejected")
36__failure __msg("R1 is bpf_array invalid negative access: off=-8")
37__failure_unpriv
38__msg_unpriv("access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN")
39__naked void read_with_negative_offset_rejected(void)
40{
41 asm volatile (" \
42 r1 = r10; \
43 r1 = %[map_array_48b] ll; \
44 r6 = *(u64*)(r1 - 8); \
45 r0 = 1; \
46 exit; \
47" :
48 : __imm_addr(map_array_48b)
49 : __clobber_all);
50}
51
52SEC("socket")
53__description("bpf_map_ptr: write rejected")
54__failure __msg("only read from bpf_array is supported")
55__failure_unpriv
56__msg_unpriv("access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN")
57__naked void bpf_map_ptr_write_rejected(void)
58{
59 asm volatile (" \
60 r0 = 0; \
61 *(u64*)(r10 - 8) = r0; \
62 r2 = r10; \
63 r2 += -8; \
64 r1 = %[map_array_48b] ll; \
65 *(u64*)(r1 + 0) = r2; \
66 r0 = 1; \
67 exit; \
68" :
69 : __imm_addr(map_array_48b)
70 : __clobber_all);
71}
72
73SEC("socket")
74__description("bpf_map_ptr: read non-existent field rejected")
75__failure
76__msg("cannot access ptr member ops with moff 0 in struct bpf_map with off 1 size 4")
77__failure_unpriv
78__msg_unpriv("access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN")
79__flag(BPF_F_ANY_ALIGNMENT)
80__naked void read_non_existent_field_rejected(void)
81{
82 asm volatile (" \
83 r6 = 0; \
84 r1 = %[map_array_48b] ll; \
85 r6 = *(u32*)(r1 + 1); \
86 r0 = 1; \
87 exit; \
88" :
89 : __imm_addr(map_array_48b)
90 : __clobber_all);
91}
92
93SEC("socket")
94__description("bpf_map_ptr: read ops field accepted")
95__success __failure_unpriv
96__msg_unpriv("access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN")
97__retval(1)
98__naked void ptr_read_ops_field_accepted(void)
99{
100 asm volatile (" \
101 r6 = 0; \
102 r1 = %[map_array_48b] ll; \
103 r6 = *(u64*)(r1 + 0); \
104 r0 = 1; \
105 exit; \
106" :
107 : __imm_addr(map_array_48b)
108 : __clobber_all);
109}
110
111SEC("socket")
112__description("bpf_map_ptr: r = 0, map_ptr = map_ptr + r")
113__success __failure_unpriv
114__msg_unpriv("R1 has pointer with unsupported alu operation")
115__retval(0)
116__naked void map_ptr_map_ptr_r(void)
117{
118 asm volatile (" \
119 r0 = 0; \
120 *(u64*)(r10 - 8) = r0; \
121 r2 = r10; \
122 r2 += -8; \
123 r0 = 0; \
124 r1 = %[map_hash_16b] ll; \
125 r1 += r0; \
126 call %[bpf_map_lookup_elem]; \
127 r0 = 0; \
128 exit; \
129" :
130 : __imm(bpf_map_lookup_elem),
131 __imm_addr(map_hash_16b)
132 : __clobber_all);
133}
134
135SEC("socket")
136__description("bpf_map_ptr: r = 0, r = r + map_ptr")
137__success __failure_unpriv
138__msg_unpriv("R0 has pointer with unsupported alu operation")
139__retval(0)
140__naked void _0_r_r_map_ptr(void)
141{
142 asm volatile (" \
143 r0 = 0; \
144 *(u64*)(r10 - 8) = r0; \
145 r2 = r10; \
146 r2 += -8; \
147 r1 = 0; \
148 r0 = %[map_hash_16b] ll; \
149 r1 += r0; \
150 call %[bpf_map_lookup_elem]; \
151 r0 = 0; \
152 exit; \
153" :
154 : __imm(bpf_map_lookup_elem),
155 __imm_addr(map_hash_16b)
156 : __clobber_all);
157}
158
159char _license[] SEC("license") = "GPL";