1// SPDX-License-Identifier: GPL-2.0
2/* Converted from tools/testing/selftests/bpf/verifier/int_ptr.c */
3
4#include <linux/bpf.h>
5#include <bpf/bpf_helpers.h>
6#include "bpf_misc.h"
7
8SEC("socket")
9__description("ARG_PTR_TO_LONG uninitialized")
10__success
11__failure_unpriv __msg_unpriv("invalid indirect read from stack R4 off -16+0 size 8")
12__naked void arg_ptr_to_long_uninitialized(void)
13{
14	asm volatile ("					\
15	/* bpf_strtoul arg1 (buf) */			\
16	r7 = r10;					\
17	r7 += -8;					\
18	r0 = 0x00303036;				\
19	*(u64*)(r7 + 0) = r0;				\
20	r1 = r7;					\
21	/* bpf_strtoul arg2 (buf_len) */		\
22	r2 = 4;						\
23	/* bpf_strtoul arg3 (flags) */			\
24	r3 = 0;						\
25	/* bpf_strtoul arg4 (res) */			\
26	r7 += -8;					\
27	r4 = r7;					\
28	/* bpf_strtoul() */				\
29	call %[bpf_strtoul];				\
30	r0 = 1;						\
31	exit;						\
32"	:
33	: __imm(bpf_strtoul)
34	: __clobber_all);
35}
36
37SEC("socket")
38__description("ARG_PTR_TO_LONG half-uninitialized")
39/* in privileged mode reads from uninitialized stack locations are permitted */
40__success __failure_unpriv
41__msg_unpriv("invalid indirect read from stack R4 off -16+4 size 8")
42__retval(0)
43__naked void ptr_to_long_half_uninitialized(void)
44{
45	asm volatile ("					\
46	/* bpf_strtoul arg1 (buf) */			\
47	r7 = r10;					\
48	r7 += -8;					\
49	r0 = 0x00303036;				\
50	*(u64*)(r7 + 0) = r0;				\
51	r1 = r7;					\
52	/* bpf_strtoul arg2 (buf_len) */		\
53	r2 = 4;						\
54	/* bpf_strtoul arg3 (flags) */			\
55	r3 = 0;						\
56	/* bpf_strtoul arg4 (res) */			\
57	r7 += -8;					\
58	*(u32*)(r7 + 0) = r0;				\
59	r4 = r7;					\
60	/* bpf_strtoul() */				\
61	call %[bpf_strtoul];				\
62	r0 = 0;						\
63	exit;						\
64"	:
65	: __imm(bpf_strtoul)
66	: __clobber_all);
67}
68
69SEC("cgroup/sysctl")
70__description("ARG_PTR_TO_LONG misaligned")
71__failure __msg("misaligned stack access off 0+-20+0 size 8")
72__naked void arg_ptr_to_long_misaligned(void)
73{
74	asm volatile ("					\
75	/* bpf_strtoul arg1 (buf) */			\
76	r7 = r10;					\
77	r7 += -8;					\
78	r0 = 0x00303036;				\
79	*(u64*)(r7 + 0) = r0;				\
80	r1 = r7;					\
81	/* bpf_strtoul arg2 (buf_len) */		\
82	r2 = 4;						\
83	/* bpf_strtoul arg3 (flags) */			\
84	r3 = 0;						\
85	/* bpf_strtoul arg4 (res) */			\
86	r7 += -12;					\
87	r0 = 0;						\
88	*(u32*)(r7 + 0) = r0;				\
89	*(u64*)(r7 + 4) = r0;				\
90	r4 = r7;					\
91	/* bpf_strtoul() */				\
92	call %[bpf_strtoul];				\
93	r0 = 1;						\
94	exit;						\
95"	:
96	: __imm(bpf_strtoul)
97	: __clobber_all);
98}
99
100SEC("cgroup/sysctl")
101__description("ARG_PTR_TO_LONG size < sizeof(long)")
102__failure __msg("invalid indirect access to stack R4 off=-4 size=8")
103__naked void to_long_size_sizeof_long(void)
104{
105	asm volatile ("					\
106	/* bpf_strtoul arg1 (buf) */			\
107	r7 = r10;					\
108	r7 += -16;					\
109	r0 = 0x00303036;				\
110	*(u64*)(r7 + 0) = r0;				\
111	r1 = r7;					\
112	/* bpf_strtoul arg2 (buf_len) */		\
113	r2 = 4;						\
114	/* bpf_strtoul arg3 (flags) */			\
115	r3 = 0;						\
116	/* bpf_strtoul arg4 (res) */			\
117	r7 += 12;					\
118	*(u32*)(r7 + 0) = r0;				\
119	r4 = r7;					\
120	/* bpf_strtoul() */				\
121	call %[bpf_strtoul];				\
122	r0 = 1;						\
123	exit;						\
124"	:
125	: __imm(bpf_strtoul)
126	: __clobber_all);
127}
128
129SEC("cgroup/sysctl")
130__description("ARG_PTR_TO_LONG initialized")
131__success
132__naked void arg_ptr_to_long_initialized(void)
133{
134	asm volatile ("					\
135	/* bpf_strtoul arg1 (buf) */			\
136	r7 = r10;					\
137	r7 += -8;					\
138	r0 = 0x00303036;				\
139	*(u64*)(r7 + 0) = r0;				\
140	r1 = r7;					\
141	/* bpf_strtoul arg2 (buf_len) */		\
142	r2 = 4;						\
143	/* bpf_strtoul arg3 (flags) */			\
144	r3 = 0;						\
145	/* bpf_strtoul arg4 (res) */			\
146	r7 += -8;					\
147	*(u64*)(r7 + 0) = r0;				\
148	r4 = r7;					\
149	/* bpf_strtoul() */				\
150	call %[bpf_strtoul];				\
151	r0 = 1;						\
152	exit;						\
153"	:
154	: __imm(bpf_strtoul)
155	: __clobber_all);
156}
157
158char _license[] SEC("license") = "GPL";
159