Resguardo inicial

linux-7.2.3/tools/testing/selftests/bpf/verifier/dead_code.c

@@ -0,0 +1,172 @@
+{
+	"dead code: start",
+	.insns = {
+	BPF_JMP_IMM(BPF_JA, 0, 0, 2),
+	/* unpriv: nospec (inserted to prevent "R9 !read_ok") */
+	BPF_LDX_MEM(BPF_B, BPF_REG_8, BPF_REG_9, 0),
+	BPF_JMP_IMM(BPF_JA, 0, 0, 2),
+	BPF_MOV64_IMM(BPF_REG_0, 7),
+	BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 10, -4),
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.retval = 7,
+},
+{
+	"dead code: mid 1",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_0, 7),
+	BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 0, 1),
+	BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 10, 0),
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.retval = 7,
+},
+{
+	"dead code: mid 2",
+	.insns = {
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_prandom_u32),
+	BPF_JMP_IMM(BPF_JSET, BPF_REG_0, 1, 4),
+	BPF_JMP_IMM(BPF_JSET, BPF_REG_0, 1, 1),
+	BPF_JMP_IMM(BPF_JA, 0, 0, 2),
+	BPF_MOV64_IMM(BPF_REG_0, 7),
+	BPF_EXIT_INSN(),
+	BPF_MOV64_IMM(BPF_REG_0, 1),
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.retval = 1,
+},
+{
+	"dead code: end 1",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_0, 7),
+	BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 10, 1),
+	BPF_EXIT_INSN(),
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.retval = 7,
+},
+{
+	"dead code: end 2",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_0, 7),
+	BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 10, 1),
+	BPF_EXIT_INSN(),
+	BPF_MOV64_IMM(BPF_REG_0, 12),
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.retval = 7,
+},
+{
+	"dead code: end 3",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_0, 7),
+	BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 8, 1),
+	BPF_EXIT_INSN(),
+	BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 10, 1),
+	BPF_JMP_IMM(BPF_JA, 0, 0, 1),
+	BPF_MOV64_IMM(BPF_REG_0, 12),
+	BPF_JMP_IMM(BPF_JA, 0, 0, -5),
+	},
+	.result = ACCEPT,
+	.retval = 7,
+},
+{
+	"dead code: tail of main + func",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_0, 7),
+	BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 8, 1),
+	BPF_EXIT_INSN(),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
+	BPF_EXIT_INSN(),
+	BPF_MOV64_IMM(BPF_REG_0, 12),
+	BPF_EXIT_INSN(),
+	},
+	.errstr_unpriv = "loading/calling other bpf or kernel functions are allowed for",
+	.result_unpriv = REJECT,
+	.result = ACCEPT,
+	.retval = 7,
+},
+{
+	"dead code: tail of main + two functions",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_0, 7),
+	BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 8, 1),
+	BPF_EXIT_INSN(),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
+	BPF_EXIT_INSN(),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
+	BPF_EXIT_INSN(),
+	BPF_MOV64_IMM(BPF_REG_0, 12),
+	BPF_EXIT_INSN(),
+	},
+	.errstr_unpriv = "loading/calling other bpf or kernel functions are allowed for",
+	.result_unpriv = REJECT,
+	.result = ACCEPT,
+	.retval = 7,
+},
+{
+	"dead code: function in the middle and mid of another func",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_1, 7),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
+	BPF_EXIT_INSN(),
+	BPF_MOV64_IMM(BPF_REG_0, 12),
+	BPF_EXIT_INSN(),
+	BPF_MOV64_IMM(BPF_REG_0, 7),
+	BPF_JMP_IMM(BPF_JGE, BPF_REG_1, 7, 1),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, -5),
+	BPF_EXIT_INSN(),
+	},
+	.errstr_unpriv = "loading/calling other bpf or kernel functions are allowed for",
+	.result_unpriv = REJECT,
+	.result = ACCEPT,
+	.retval = 7,
+},
+{
+	"dead code: middle of main before call",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_1, 2),
+	BPF_JMP_IMM(BPF_JGE, BPF_REG_1, 2, 1),
+	BPF_MOV64_IMM(BPF_REG_1, 5),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
+	BPF_EXIT_INSN(),
+	BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
+	BPF_EXIT_INSN(),
+	},
+	.errstr_unpriv = "loading/calling other bpf or kernel functions are allowed for",
+	.result_unpriv = REJECT,
+	.result = ACCEPT,
+	.retval = 2,
+},
+{
+	"dead code: start of a function",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_1, 2),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
+	BPF_EXIT_INSN(),
+	BPF_JMP_IMM(BPF_JA, 0, 0, 0),
+	BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
+	BPF_EXIT_INSN(),
+	},
+	.errstr_unpriv = "loading/calling other bpf or kernel functions are allowed for",
+	.result_unpriv = REJECT,
+	.result = ACCEPT,
+	.retval = 2,
+},
+{
+	"dead code: zero extension",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_0, 0),
+	BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_0, -4),
+	BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 0, 1),
+	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_10, -4),
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.retval = 0,
+},