94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
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{
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"context stores via ST",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_ST_MEM(BPF_DW, BPF_REG_1, offsetof(struct __sk_buff, mark), 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "BPF_ST stores into R1 ctx is not allowed",
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.result = REJECT,
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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},
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{
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"context stores via XADD",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_RAW_INSN(BPF_STX | BPF_XADD | BPF_W, BPF_REG_1,
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BPF_REG_0, offsetof(struct __sk_buff, mark), 0),
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BPF_EXIT_INSN(),
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},
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.errstr = "BPF_XADD stores into R1 ctx is not allowed",
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.result = REJECT,
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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},
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{
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"arithmetic ops make PTR_TO_CTX unusable",
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.insns = {
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_1,
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offsetof(struct __sk_buff, data) -
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offsetof(struct __sk_buff, mark)),
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BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
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offsetof(struct __sk_buff, mark)),
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BPF_EXIT_INSN(),
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},
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.errstr = "dereference of modified ctx ptr",
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.result = REJECT,
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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},
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{
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"pass unmodified ctx pointer to helper",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_2, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
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BPF_FUNC_csum_update),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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.result = ACCEPT,
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},
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{
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"pass modified ctx pointer to helper, 1",
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.insns = {
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -612),
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BPF_MOV64_IMM(BPF_REG_2, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
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BPF_FUNC_csum_update),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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.result = REJECT,
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.errstr = "dereference of modified ctx ptr",
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},
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{
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"pass modified ctx pointer to helper, 2",
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.insns = {
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -612),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
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BPF_FUNC_get_socket_cookie),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.result_unpriv = REJECT,
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.result = REJECT,
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.errstr_unpriv = "dereference of modified ctx ptr",
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.errstr = "dereference of modified ctx ptr",
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},
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{
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"pass modified ctx pointer to helper, 3",
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.insns = {
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BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, 0),
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BPF_ALU64_IMM(BPF_AND, BPF_REG_3, 4),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_3),
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BPF_MOV64_IMM(BPF_REG_2, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
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BPF_FUNC_csum_update),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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.result = REJECT,
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.errstr = "variable ctx access var_off=(0x0; 0x4)",
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},
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