1{
 2	"check valid spill/fill",
 3	.insns = {
 4	/* spill R1(ctx) into stack */
 5	BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
 6	/* fill it back into R2 */
 7	BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_10, -8),
 8	/* should be able to access R0 = *(R2 + 8) */
 9	/* BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, 8), */
10	BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
11	BPF_EXIT_INSN(),
12	},
13	.errstr_unpriv = "R0 leaks addr",
14	.result = ACCEPT,
15	.result_unpriv = REJECT,
16	.retval = POINTER_VALUE,
17},
18{
19	"check valid spill/fill, skb mark",
20	.insns = {
21	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_1),
22	BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, -8),
23	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
24	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_0,
25		    offsetof(struct __sk_buff, mark)),
26	BPF_EXIT_INSN(),
27	},
28	.result = ACCEPT,
29	.result_unpriv = ACCEPT,
30},
31{
32	"check corrupted spill/fill",
33	.insns = {
34	/* spill R1(ctx) into stack */
35	BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
36	/* mess up with R1 pointer on stack */
37	BPF_ST_MEM(BPF_B, BPF_REG_10, -7, 0x23),
38	/* fill back into R0 is fine for priv.
39	 * R0 now becomes SCALAR_VALUE.
40	 */
41	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
42	/* Load from R0 should fail. */
43	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
44	BPF_EXIT_INSN(),
45	},
46	.errstr_unpriv = "attempt to corrupt spilled",
47	.errstr = "R0 invalid mem access 'inv",
48	.result = REJECT,
49	.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
50},
51{
52	"check corrupted spill/fill, LSB",
53	.insns = {
54	BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
55	BPF_ST_MEM(BPF_H, BPF_REG_10, -8, 0xcafe),
56	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
57	BPF_EXIT_INSN(),
58	},
59	.errstr_unpriv = "attempt to corrupt spilled",
60	.result_unpriv = REJECT,
61	.result = ACCEPT,
62	.retval = POINTER_VALUE,
63},
64{
65	"check corrupted spill/fill, MSB",
66	.insns = {
67	BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
68	BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0x12345678),
69	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
70	BPF_EXIT_INSN(),
71	},
72	.errstr_unpriv = "attempt to corrupt spilled",
73	.result_unpriv = REJECT,
74	.result = ACCEPT,
75	.retval = POINTER_VALUE,
76},