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Open Menu /tools/testing/selftests/bpf/verifier/spin_lock.c 
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{
	"spin_lock: test1 success",
	.insns = {
	BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4),
	BPF_LD_MAP_FD(BPF_REG_1,
		      0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_lock),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_6, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_unlock),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_spin_lock = { 3 },
	.result = ACCEPT,
	.result_unpriv = REJECT,
	.errstr_unpriv = "",
	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
},
{
	"spin_lock: test2 direct ld/st",
	.insns = {
	BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4),
	BPF_LD_MAP_FD(BPF_REG_1,
		      0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_lock),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_unlock),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_spin_lock = { 3 },
	.result = REJECT,
	.errstr = "cannot be accessed directly",
	.result_unpriv = REJECT,
	.errstr_unpriv = "",
	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
},
{
	"spin_lock: test3 direct ld/st",
	.insns = {
	BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4),
	BPF_LD_MAP_FD(BPF_REG_1,
		      0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_lock),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_6, 1),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_unlock),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_spin_lock = { 3 },
	.result = REJECT,
	.errstr = "cannot be accessed directly",
	.result_unpriv = REJECT,
	.errstr_unpriv = "",
	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
	.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
	"spin_lock: test4 direct ld/st",
	.insns = {
	BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4),
	BPF_LD_MAP_FD(BPF_REG_1,
		      0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_lock),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_6, 3),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_unlock),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_spin_lock = { 3 },
	.result = REJECT,
	.errstr = "cannot be accessed directly",
	.result_unpriv = REJECT,
	.errstr_unpriv = "",
	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
	.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
	"spin_lock: test5 call within a locked region",
	.insns = {
	BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4),
	BPF_LD_MAP_FD(BPF_REG_1,
		      0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_lock),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_prandom_u32),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_unlock),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_spin_lock = { 3 },
	.result = REJECT,
	.errstr = "calls are not allowed",
	.result_unpriv = REJECT,
	.errstr_unpriv = "",
	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
},
{
	"spin_lock: test6 missing unlock",
	.insns = {
	BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4),
	BPF_LD_MAP_FD(BPF_REG_1,
		      0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_lock),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_6, 0),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_unlock),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_spin_lock = { 3 },
	.result = REJECT,
	.errstr = "unlock is missing",
	.result_unpriv = REJECT,
	.errstr_unpriv = "",
	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
},
{
	"spin_lock: test7 unlock without lock",
	.insns = {
	BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4),
	BPF_LD_MAP_FD(BPF_REG_1,
		      0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_lock),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_6, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_unlock),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_spin_lock = { 3 },
	.result = REJECT,
	.errstr = "without taking a lock",
	.result_unpriv = REJECT,
	.errstr_unpriv = "",
	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
},
{
	"spin_lock: test8 double lock",
	.insns = {
	BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4),
	BPF_LD_MAP_FD(BPF_REG_1,
		      0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_lock),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_lock),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_6, 0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_unlock),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_spin_lock = { 3 },
	.result = REJECT,
	.errstr = "calls are not allowed",
	.result_unpriv = REJECT,
	.errstr_unpriv = "",
	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
},
{
	"spin_lock: test9 different lock",
	.insns = {
	BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4),
	BPF_LD_MAP_FD(BPF_REG_1,
		      0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4),
	BPF_LD_MAP_FD(BPF_REG_1,
		      0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_REG(BPF_REG_7, BPF_REG_0),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_lock),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_unlock),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_spin_lock = { 3, 11 },
	.result = REJECT,
	.errstr = "unlock of different lock",
	.result_unpriv = REJECT,
	.errstr_unpriv = "",
	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
},
{
	"spin_lock: test10 lock in subprog without unlock",
	.insns = {
	BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4),
	BPF_LD_MAP_FD(BPF_REG_1,
		      0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 5),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_unlock),
	BPF_MOV64_IMM(BPF_REG_0, 1),
	BPF_EXIT_INSN(),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_lock),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_spin_lock = { 3 },
	.result = REJECT,
	.errstr = "unlock is missing",
	.result_unpriv = REJECT,
	.errstr_unpriv = "",
	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
},
{
	"spin_lock: test11 ld_abs under lock",
	.insns = {
	BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
	BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0),
	BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4),
	BPF_LD_MAP_FD(BPF_REG_1,
		      0),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_REG(BPF_REG_7, BPF_REG_0),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_lock),
	BPF_LD_ABS(BPF_B, 0),
	BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 4),
	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_spin_unlock),
	BPF_MOV64_IMM(BPF_REG_0, 0),
	BPF_EXIT_INSN(),
	},
	.fixup_map_spin_lock = { 4 },
	.result = REJECT,
	.errstr = "inside bpf_spin_lock",
	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},