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-rw-r--r--samples/bpf/test_verifier.c678
1 files changed, 678 insertions, 0 deletions
diff --git a/samples/bpf/test_verifier.c b/samples/bpf/test_verifier.c
new file mode 100644
index 000000000000..f44ef11f65a7
--- /dev/null
+++ b/samples/bpf/test_verifier.c
@@ -0,0 +1,678 @@
+/*
+ * Testsuite for eBPF verifier
+ *
+ * Copyright (c) 2014 PLUMgrid, http://plumgrid.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ */
+#include <stdio.h>
+#include <unistd.h>
+#include <linux/bpf.h>
+#include <errno.h>
+#include <linux/unistd.h>
+#include <string.h>
+#include <linux/filter.h>
+#include "libbpf.h"
+
+#define MAX_INSNS 512
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
+
+struct bpf_test {
+ const char *descr;
+ struct bpf_insn insns[MAX_INSNS];
+ int fixup[32];
+ const char *errstr;
+ enum {
+ ACCEPT,
+ REJECT
+ } result;
+};
+
+static struct bpf_test tests[] = {
+ {
+ "add+sub+mul",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_1, 1),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 2),
+ BPF_MOV64_IMM(BPF_REG_2, 3),
+ BPF_ALU64_REG(BPF_SUB, BPF_REG_1, BPF_REG_2),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -1),
+ BPF_ALU64_IMM(BPF_MUL, BPF_REG_1, 3),
+ BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ },
+ {
+ "unreachable",
+ .insns = {
+ BPF_EXIT_INSN(),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "unreachable",
+ .result = REJECT,
+ },
+ {
+ "unreachable2",
+ .insns = {
+ BPF_JMP_IMM(BPF_JA, 0, 0, 1),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "unreachable",
+ .result = REJECT,
+ },
+ {
+ "out of range jump",
+ .insns = {
+ BPF_JMP_IMM(BPF_JA, 0, 0, 1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "jump out of range",
+ .result = REJECT,
+ },
+ {
+ "out of range jump2",
+ .insns = {
+ BPF_JMP_IMM(BPF_JA, 0, 0, -2),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "jump out of range",
+ .result = REJECT,
+ },
+ {
+ "test1 ld_imm64",
+ .insns = {
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
+ BPF_LD_IMM64(BPF_REG_0, 0),
+ BPF_LD_IMM64(BPF_REG_0, 0),
+ BPF_LD_IMM64(BPF_REG_0, 1),
+ BPF_LD_IMM64(BPF_REG_0, 1),
+ BPF_MOV64_IMM(BPF_REG_0, 2),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid BPF_LD_IMM insn",
+ .result = REJECT,
+ },
+ {
+ "test2 ld_imm64",
+ .insns = {
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
+ BPF_LD_IMM64(BPF_REG_0, 0),
+ BPF_LD_IMM64(BPF_REG_0, 0),
+ BPF_LD_IMM64(BPF_REG_0, 1),
+ BPF_LD_IMM64(BPF_REG_0, 1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid BPF_LD_IMM insn",
+ .result = REJECT,
+ },
+ {
+ "test3 ld_imm64",
+ .insns = {
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
+ BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, 0, 0, 0, 0),
+ BPF_LD_IMM64(BPF_REG_0, 0),
+ BPF_LD_IMM64(BPF_REG_0, 0),
+ BPF_LD_IMM64(BPF_REG_0, 1),
+ BPF_LD_IMM64(BPF_REG_0, 1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_ld_imm64 insn",
+ .result = REJECT,
+ },
+ {
+ "test4 ld_imm64",
+ .insns = {
+ BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, 0, 0, 0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_ld_imm64 insn",
+ .result = REJECT,
+ },
+ {
+ "test5 ld_imm64",
+ .insns = {
+ BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, 0, 0, 0, 0),
+ },
+ .errstr = "invalid bpf_ld_imm64 insn",
+ .result = REJECT,
+ },
+ {
+ "no bpf_exit",
+ .insns = {
+ BPF_ALU64_REG(BPF_MOV, BPF_REG_0, BPF_REG_2),
+ },
+ .errstr = "jump out of range",
+ .result = REJECT,
+ },
+ {
+ "loop (back-edge)",
+ .insns = {
+ BPF_JMP_IMM(BPF_JA, 0, 0, -1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "back-edge",
+ .result = REJECT,
+ },
+ {
+ "loop2 (back-edge)",
+ .insns = {
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
+ BPF_MOV64_REG(BPF_REG_3, BPF_REG_0),
+ BPF_JMP_IMM(BPF_JA, 0, 0, -4),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "back-edge",
+ .result = REJECT,
+ },
+ {
+ "conditional loop",
+ .insns = {
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
+ BPF_MOV64_REG(BPF_REG_3, BPF_REG_0),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, -3),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "back-edge",
+ .result = REJECT,
+ },
+ {
+ "read uninitialized register",
+ .insns = {
+ BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "R2 !read_ok",
+ .result = REJECT,
+ },
+ {
+ "read invalid register",
+ .insns = {
+ BPF_MOV64_REG(BPF_REG_0, -1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "R15 is invalid",
+ .result = REJECT,
+ },
+ {
+ "program doesn't init R0 before exit",
+ .insns = {
+ BPF_ALU64_REG(BPF_MOV, BPF_REG_2, BPF_REG_1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "R0 !read_ok",
+ .result = REJECT,
+ },
+ {
+ "stack out of bounds",
+ .insns = {
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, 8, 0),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid stack",
+ .result = REJECT,
+ },
+ {
+ "invalid call insn1",
+ .insns = {
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL | BPF_X, 0, 0, 0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "BPF_CALL uses reserved",
+ .result = REJECT,
+ },
+ {
+ "invalid call insn2",
+ .insns = {
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 1, 0),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "BPF_CALL uses reserved",
+ .result = REJECT,
+ },
+ {
+ "invalid function call",
+ .insns = {
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, 1234567),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid func 1234567",
+ .result = REJECT,
+ },
+ {
+ "uninitialized stack1",
+ .insns = {
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_unspec),
+ BPF_EXIT_INSN(),
+ },
+ .fixup = {2},
+ .errstr = "invalid indirect read from stack",
+ .result = REJECT,
+ },
+ {
+ "uninitialized stack2",
+ .insns = {
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, -8),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid read from stack",
+ .result = REJECT,
+ },
+ {
+ "check valid spill/fill",
+ .insns = {
+ /* spill R1(ctx) into stack */
+ BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
+
+ /* fill it back into R2 */
+ BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_10, -8),
+
+ /* should be able to access R0 = *(R2 + 8) */
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, 8),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ },
+ {
+ "check corrupted spill/fill",
+ .insns = {
+ /* spill R1(ctx) into stack */
+ BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
+
+ /* mess up with R1 pointer on stack */
+ BPF_ST_MEM(BPF_B, BPF_REG_10, -7, 0x23),
+
+ /* fill back into R0 should fail */
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
+
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "corrupted spill",
+ .result = REJECT,
+ },
+ {
+ "invalid src register in STX",
+ .insns = {
+ BPF_STX_MEM(BPF_B, BPF_REG_10, -1, -1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "R15 is invalid",
+ .result = REJECT,
+ },
+ {
+ "invalid dst register in STX",
+ .insns = {
+ BPF_STX_MEM(BPF_B, 14, BPF_REG_10, -1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "R14 is invalid",
+ .result = REJECT,
+ },
+ {
+ "invalid dst register in ST",
+ .insns = {
+ BPF_ST_MEM(BPF_B, 14, -1, -1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "R14 is invalid",
+ .result = REJECT,
+ },
+ {
+ "invalid src register in LDX",
+ .insns = {
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, 12, 0),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "R12 is invalid",
+ .result = REJECT,
+ },
+ {
+ "invalid dst register in LDX",
+ .insns = {
+ BPF_LDX_MEM(BPF_B, 11, BPF_REG_1, 0),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "R11 is invalid",
+ .result = REJECT,
+ },
+ {
+ "junk insn",
+ .insns = {
+ BPF_RAW_INSN(0, 0, 0, 0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid BPF_LD_IMM",
+ .result = REJECT,
+ },
+ {
+ "junk insn2",
+ .insns = {
+ BPF_RAW_INSN(1, 0, 0, 0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "BPF_LDX uses reserved fields",
+ .result = REJECT,
+ },
+ {
+ "junk insn3",
+ .insns = {
+ BPF_RAW_INSN(-1, 0, 0, 0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid BPF_ALU opcode f0",
+ .result = REJECT,
+ },
+ {
+ "junk insn4",
+ .insns = {
+ BPF_RAW_INSN(-1, -1, -1, -1, -1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid BPF_ALU opcode f0",
+ .result = REJECT,
+ },
+ {
+ "junk insn5",
+ .insns = {
+ BPF_RAW_INSN(0x7f, -1, -1, -1, -1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "BPF_ALU uses reserved fields",
+ .result = REJECT,
+ },
+ {
+ "misaligned read from stack",
+ .insns = {
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, -4),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "misaligned access",
+ .result = REJECT,
+ },
+ {
+ "invalid map_fd for function call",
+ .insns = {
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
+ BPF_ALU64_REG(BPF_MOV, BPF_REG_2, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_unspec),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "fd 0 is not pointing to valid bpf_map",
+ .result = REJECT,
+ },
+ {
+ "don't check return value before access",
+ .insns = {
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_unspec),
+ BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .fixup = {3},
+ .errstr = "R0 invalid mem access 'map_value_or_null'",
+ .result = REJECT,
+ },
+ {
+ "access memory with incorrect alignment",
+ .insns = {
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_unspec),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
+ BPF_ST_MEM(BPF_DW, BPF_REG_0, 4, 0),
+ BPF_EXIT_INSN(),
+ },
+ .fixup = {3},
+ .errstr = "misaligned access",
+ .result = REJECT,
+ },
+ {
+ "sometimes access memory with incorrect alignment",
+ .insns = {
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_unspec),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
+ BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
+ BPF_EXIT_INSN(),
+ BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 1),
+ BPF_EXIT_INSN(),
+ },
+ .fixup = {3},
+ .errstr = "R0 invalid mem access",
+ .result = REJECT,
+ },
+ {
+ "jump test 1",
+ .insns = {
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_1, -8),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 0),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 1),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -16, 1),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 2, 1),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 2),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 3, 1),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -16, 3),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 4, 1),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 4),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 5, 1),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -32, 5),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ },
+ {
+ "jump test 2",
+ .insns = {
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 2),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 0),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 14),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 2),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -16, 0),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 11),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 2, 2),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -32, 0),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 8),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 3, 2),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -40, 0),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 5),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 4, 2),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -48, 0),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 2),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 5, 1),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -56, 0),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ },
+ {
+ "jump test 3",
+ .insns = {
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 0),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 19),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 3),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -16, 0),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 15),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 2, 3),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -32, 0),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -32),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 11),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 3, 3),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -40, 0),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -40),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 7),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 4, 3),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -48, 0),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -48),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 3),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 5, 0),
+ BPF_ST_MEM(BPF_DW, BPF_REG_2, -56, 0),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -56),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_unspec),
+ BPF_EXIT_INSN(),
+ },
+ .fixup = {24},
+ .result = ACCEPT,
+ },
+ {
+ "jump test 4",
+ .insns = {
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ },
+};
+
+static int probe_filter_length(struct bpf_insn *fp)
+{
+ int len = 0;
+
+ for (len = MAX_INSNS - 1; len > 0; --len)
+ if (fp[len].code != 0 || fp[len].imm != 0)
+ break;
+
+ return len + 1;
+}
+
+static int create_map(void)
+{
+ long long key, value = 0;
+ int map_fd;
+
+ map_fd = bpf_create_map(BPF_MAP_TYPE_UNSPEC, sizeof(key), sizeof(value), 1024);
+ if (map_fd < 0) {
+ printf("failed to create map '%s'\n", strerror(errno));
+ }
+
+ return map_fd;
+}
+
+static int test(void)
+{
+ int prog_fd, i;
+
+ for (i = 0; i < ARRAY_SIZE(tests); i++) {
+ struct bpf_insn *prog = tests[i].insns;
+ int prog_len = probe_filter_length(prog);
+ int *fixup = tests[i].fixup;
+ int map_fd = -1;
+
+ if (*fixup) {
+ map_fd = create_map();
+
+ do {
+ prog[*fixup].imm = map_fd;
+ fixup++;
+ } while (*fixup);
+ }
+ printf("#%d %s ", i, tests[i].descr);
+
+ prog_fd = bpf_prog_load(BPF_PROG_TYPE_UNSPEC, prog,
+ prog_len * sizeof(struct bpf_insn),
+ "GPL");
+
+ if (tests[i].result == ACCEPT) {
+ if (prog_fd < 0) {
+ printf("FAIL\nfailed to load prog '%s'\n",
+ strerror(errno));
+ printf("%s", bpf_log_buf);
+ goto fail;
+ }
+ } else {
+ if (prog_fd >= 0) {
+ printf("FAIL\nunexpected success to load\n");
+ printf("%s", bpf_log_buf);
+ goto fail;
+ }
+ if (strstr(bpf_log_buf, tests[i].errstr) == 0) {
+ printf("FAIL\nunexpected error message: %s",
+ bpf_log_buf);
+ goto fail;
+ }
+ }
+
+ printf("OK\n");
+fail:
+ if (map_fd >= 0)
+ close(map_fd);
+ close(prog_fd);
+
+ }
+
+ return 0;
+}
+
+int main(void)
+{
+ return test();
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 05:39:26 +0100