1{
 2	"BPF_ST_MEM stack imm non-zero",
 3	.insns = {
 4	BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 42),
 5	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
 6	BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, -42),
 7	/* if value is tracked correctly R0 is zero */
 8	BPF_EXIT_INSN(),
 9	},
10	.result = ACCEPT,
11	/* Use prog type that requires return value in range [0, 1] */
12	.prog_type = BPF_PROG_TYPE_SK_LOOKUP,
13	.expected_attach_type = BPF_SK_LOOKUP,
14	.runs = -1,
15},
16{
17	"BPF_ST_MEM stack imm zero",
18	.insns = {
19	/* mark stack 0000 0000 */
20	BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
21	/* read and sum a few bytes */
22	BPF_MOV64_IMM(BPF_REG_0, 0),
23	BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_10, -8),
24	BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
25	BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_10, -4),
26	BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
27	BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_10, -1),
28	BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
29	/* if value is tracked correctly R0 is zero */
30	BPF_EXIT_INSN(),
31	},
32	.result = ACCEPT,
33	/* Use prog type that requires return value in range [0, 1] */
34	.prog_type = BPF_PROG_TYPE_SK_LOOKUP,
35	.expected_attach_type = BPF_SK_LOOKUP,
36	.runs = -1,
37},
38{
39	"BPF_ST_MEM stack imm zero, variable offset",
40	.insns = {
41	/* set fp[-16], fp[-24] to zeros */
42	BPF_ST_MEM(BPF_DW, BPF_REG_10, -16, 0),
43	BPF_ST_MEM(BPF_DW, BPF_REG_10, -24, 0),
44	/* r0 = random value in range [-32, -15] */
45	BPF_EMIT_CALL(BPF_FUNC_get_prandom_u32),
46	BPF_JMP_IMM(BPF_JLE, BPF_REG_0, 16, 2),
47	BPF_MOV64_IMM(BPF_REG_0, 0),
48	BPF_EXIT_INSN(),
49	BPF_ALU64_IMM(BPF_SUB, BPF_REG_0, 32),
50	/* fp[r0] = 0, make a variable offset write of zero,
51	 *             this should preserve zero marks on stack.
52	 */
53	BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_10),
54	BPF_ST_MEM(BPF_B, BPF_REG_0, 0, 0),
55	/* r0 = fp[-20], if variable offset write was tracked correctly
56	 *               r0 would be a known zero.
57	 */
58	BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_10, -20),
59	/* Would fail return code verification if r0 range is not tracked correctly. */
60	BPF_EXIT_INSN(),
61	},
62	.result = ACCEPT,
63	/* Use prog type that requires return value in range [0, 1] */
64	.prog_type = BPF_PROG_TYPE_SK_LOOKUP,
65	.expected_attach_type = BPF_SK_LOOKUP,
66	.runs = -1,
67},
68{
69	"BPF_ST_MEM stack imm sign",
70	/* Check if verifier correctly reasons about sign of an
71	 * immediate spilled to stack by BPF_ST instruction.
72	 *
73	 *   fp[-8] = -44;
74	 *   r0 = fp[-8];
75	 *   if r0 s< 0 goto ret0;
76	 *   r0 = -1;
77	 *   exit;
78	 * ret0:
79	 *   r0 = 0;
80	 *   exit;
81	 */
82	.insns = {
83	BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, -44),
84	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
85	BPF_JMP_IMM(BPF_JSLT, BPF_REG_0, 0, 2),
86	BPF_MOV64_IMM(BPF_REG_0, -1),
87	BPF_EXIT_INSN(),
88	BPF_MOV64_IMM(BPF_REG_0, 0),
89	BPF_EXIT_INSN(),
90	},
91	/* Use prog type that requires return value in range [0, 1] */
92	.prog_type = BPF_PROG_TYPE_SK_LOOKUP,
93	.expected_attach_type = BPF_SK_LOOKUP,
94	.result = VERBOSE_ACCEPT,
95	.runs = -1,
96	.errstr = "0: (7a) *(u64 *)(r10 -8) = -44        ; R10=fp0 fp-8_w=-44\
97	2: (c5) if r0 s< 0x0 goto pc+2\
98	R0_w=-44",
99},