1// SPDX-License-Identifier: GPL-2.0
2/* Converted from tools/testing/selftests/bpf/verifier/and.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_HASH);
17	__uint(max_entries, 1);
18	__type(key, long long);
19	__type(value, struct test_val);
20} map_hash_48b SEC(".maps");
21
22SEC("socket")
23__description("invalid and of negative number")
24__failure __msg("R0 max value is outside of the allowed memory range")
25__failure_unpriv
26__flag(BPF_F_ANY_ALIGNMENT)
27__naked void invalid_and_of_negative_number(void)
28{
29	asm volatile ("					\
30	r1 = 0;						\
31	*(u64*)(r10 - 8) = r1;				\
32	r2 = r10;					\
33	r2 += -8;					\
34	r1 = %[map_hash_48b] ll;			\
35	call %[bpf_map_lookup_elem];			\
36	if r0 == 0 goto l0_%=;				\
37	r1 = *(u8*)(r0 + 0);				\
38	r1 &= -4;					\
39	r1 <<= 2;					\
40	r0 += r1;					\
41l0_%=:	r1 = %[test_val_foo];				\
42	*(u64*)(r0 + 0) = r1;				\
43	exit;						\
44"	:
45	: __imm(bpf_map_lookup_elem),
46	  __imm_addr(map_hash_48b),
47	  __imm_const(test_val_foo, offsetof(struct test_val, foo))
48	: __clobber_all);
49}
50
51SEC("socket")
52__description("invalid range check")
53__failure __msg("R0 max value is outside of the allowed memory range")
54__failure_unpriv
55__flag(BPF_F_ANY_ALIGNMENT)
56__naked void invalid_range_check(void)
57{
58	asm volatile ("					\
59	r1 = 0;						\
60	*(u64*)(r10 - 8) = r1;				\
61	r2 = r10;					\
62	r2 += -8;					\
63	r1 = %[map_hash_48b] ll;			\
64	call %[bpf_map_lookup_elem];			\
65	if r0 == 0 goto l0_%=;				\
66	r1 = *(u32*)(r0 + 0);				\
67	r9 = 1;						\
68	w1 %%= 2;					\
69	w1 += 1;					\
70	w9 &= w1;					\
71	w9 += 1;					\
72	w9 >>= 1;					\
73	w3 = 1;						\
74	w3 -= w9;					\
75	w3 *= 0x10000000;				\
76	r0 += r3;					\
77	*(u32*)(r0 + 0) = r3;				\
78l0_%=:	r0 = r0;					\
79	exit;						\
80"	:
81	: __imm(bpf_map_lookup_elem),
82	  __imm_addr(map_hash_48b)
83	: __clobber_all);
84}
85
86SEC("socket")
87__description("check known subreg with unknown reg")
88__success __failure_unpriv __msg_unpriv("R1 !read_ok")
89__retval(0)
90__naked void known_subreg_with_unknown_reg(void)
91{
92	asm volatile ("					\
93	call %[bpf_get_prandom_u32];			\
94	r0 <<= 32;					\
95	r0 += 1;					\
96	r0 &= 0xFFFF1234;				\
97	/* Upper bits are unknown but AND above masks out 1 zero'ing lower bits */\
98	if w0 < 1 goto l0_%=;				\
99	r1 = *(u32*)(r1 + 512);				\
100l0_%=:	r0 = 0;						\
101	exit;						\
102"	:
103	: __imm(bpf_get_prandom_u32)
104	: __clobber_all);
105}
106
107char _license[] SEC("license") = "GPL";
108