mirror of https://gitee.com/openkylin/linux.git
bpf: add test cases for new BPF_J{LT, LE, SLT, SLE} instructions
Add test cases to the verifier selftest suite in order to verify that i) direct packet access, and ii) dynamic map value access is working with the changes related to the new instructions. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann
David S. Miller
parent
b4e432f100
commit
31e482bf7e
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@ -2830,6 +2830,79 @@ static struct bpf_test tests[] = {
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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.result = ACCEPT,
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.result = ACCEPT,
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},
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},
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{
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"direct packet access: test25 (marking on <, good access)",
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.insns = {
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BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
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offsetof(struct __sk_buff, data)),
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BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
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offsetof(struct __sk_buff, data_end)),
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BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8),
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BPF_JMP_REG(BPF_JLT, BPF_REG_0, BPF_REG_3, 2),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_2, 0),
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BPF_JMP_IMM(BPF_JA, 0, 0, -4),
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},
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.result = ACCEPT,
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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},
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{
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"direct packet access: test26 (marking on <, bad access)",
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.insns = {
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BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
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offsetof(struct __sk_buff, data)),
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BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
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offsetof(struct __sk_buff, data_end)),
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BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8),
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BPF_JMP_REG(BPF_JLT, BPF_REG_0, BPF_REG_3, 3),
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BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_2, 0),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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BPF_JMP_IMM(BPF_JA, 0, 0, -3),
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},
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.result = REJECT,
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.errstr = "invalid access to packet",
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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},
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{
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"direct packet access: test27 (marking on <=, good access)",
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.insns = {
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BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
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offsetof(struct __sk_buff, data)),
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BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
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offsetof(struct __sk_buff, data_end)),
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BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8),
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BPF_JMP_REG(BPF_JLE, BPF_REG_3, BPF_REG_0, 1),
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BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_2, 0),
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BPF_MOV64_IMM(BPF_REG_0, 1),
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BPF_EXIT_INSN(),
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},
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.result = ACCEPT,
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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},
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{
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"direct packet access: test28 (marking on <=, bad access)",
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.insns = {
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BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
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offsetof(struct __sk_buff, data)),
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BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
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offsetof(struct __sk_buff, data_end)),
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BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8),
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BPF_JMP_REG(BPF_JLE, BPF_REG_3, BPF_REG_0, 2),
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BPF_MOV64_IMM(BPF_REG_0, 1),
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BPF_EXIT_INSN(),
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BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_2, 0),
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BPF_JMP_IMM(BPF_JA, 0, 0, -4),
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},
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.result = REJECT,
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.errstr = "invalid access to packet",
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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},
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{
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{
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"helper access to packet: test1, valid packet_ptr range",
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"helper access to packet: test1, valid packet_ptr range",
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.insns = {
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.insns = {
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@ -4488,6 +4561,246 @@ static struct bpf_test tests[] = {
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.result = REJECT,
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.result = REJECT,
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.prog_type = BPF_PROG_TYPE_TRACEPOINT,
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.prog_type = BPF_PROG_TYPE_TRACEPOINT,
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},
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},
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{
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"helper access to map: bounds check using <, good access",
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.insns = {
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
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BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JLT, BPF_REG_3, 32, 2),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_3),
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BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 0),
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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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.fixup_map2 = { 3 },
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.result = ACCEPT,
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.prog_type = BPF_PROG_TYPE_TRACEPOINT,
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},
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{
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"helper access to map: bounds check using <, bad access",
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.insns = {
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
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BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JLT, BPF_REG_3, 32, 4),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_3),
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BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 0),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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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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.fixup_map2 = { 3 },
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.result = REJECT,
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.errstr = "R1 unbounded memory access",
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.prog_type = BPF_PROG_TYPE_TRACEPOINT,
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},
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{
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"helper access to map: bounds check using <=, good access",
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.insns = {
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
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BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JLE, BPF_REG_3, 32, 2),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_3),
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BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 0),
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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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.fixup_map2 = { 3 },
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.result = ACCEPT,
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.prog_type = BPF_PROG_TYPE_TRACEPOINT,
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},
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{
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"helper access to map: bounds check using <=, bad access",
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.insns = {
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
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BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JLE, BPF_REG_3, 32, 4),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_3),
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BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 0),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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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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.fixup_map2 = { 3 },
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.result = REJECT,
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.errstr = "R1 unbounded memory access",
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.prog_type = BPF_PROG_TYPE_TRACEPOINT,
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},
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{
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"helper access to map: bounds check using s<, good access",
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.insns = {
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
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BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JSLT, BPF_REG_3, 32, 2),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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BPF_JMP_IMM(BPF_JSLT, BPF_REG_3, 0, -3),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_3),
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BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 0),
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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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.fixup_map2 = { 3 },
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.result = ACCEPT,
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.prog_type = BPF_PROG_TYPE_TRACEPOINT,
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},
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{
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"helper access to map: bounds check using s<, good access 2",
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.insns = {
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
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BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JSLT, BPF_REG_3, 32, 2),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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BPF_JMP_IMM(BPF_JSLT, BPF_REG_3, -3, -3),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_3),
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BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 0),
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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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.fixup_map2 = { 3 },
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.result = ACCEPT,
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.prog_type = BPF_PROG_TYPE_TRACEPOINT,
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},
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{
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"helper access to map: bounds check using s<, bad access",
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.insns = {
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
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BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JSLT, BPF_REG_3, 32, 2),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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BPF_JMP_IMM(BPF_JSLT, BPF_REG_3, -3, -3),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_3),
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BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 0),
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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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.fixup_map2 = { 3 },
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.result = REJECT,
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.errstr = "R1 min value is negative",
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.prog_type = BPF_PROG_TYPE_TRACEPOINT,
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},
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{
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"helper access to map: bounds check using s<=, good access",
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.insns = {
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
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BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JSLE, BPF_REG_3, 32, 2),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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BPF_JMP_IMM(BPF_JSLE, BPF_REG_3, 0, -3),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_3),
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BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 0),
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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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.fixup_map2 = { 3 },
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.result = ACCEPT,
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.prog_type = BPF_PROG_TYPE_TRACEPOINT,
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},
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{
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"helper access to map: bounds check using s<=, good access 2",
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.insns = {
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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||||||
|
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
|
||||||
|
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_0, 0),
|
||||||
|
BPF_JMP_IMM(BPF_JSLE, BPF_REG_3, 32, 2),
|
||||||
|
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||||
|
BPF_EXIT_INSN(),
|
||||||
|
BPF_JMP_IMM(BPF_JSLE, BPF_REG_3, -3, -3),
|
||||||
|
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_3),
|
||||||
|
BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 0),
|
||||||
|
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||||
|
BPF_EXIT_INSN(),
|
||||||
|
},
|
||||||
|
.fixup_map2 = { 3 },
|
||||||
|
.result = ACCEPT,
|
||||||
|
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"helper access to map: bounds check using s<=, bad access",
|
||||||
|
.insns = {
|
||||||
|
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||||
|
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||||
|
BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
|
||||||
|
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||||
|
BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
|
||||||
|
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
|
||||||
|
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
|
||||||
|
BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_0, 0),
|
||||||
|
BPF_JMP_IMM(BPF_JSLE, BPF_REG_3, 32, 2),
|
||||||
|
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||||
|
BPF_EXIT_INSN(),
|
||||||
|
BPF_JMP_IMM(BPF_JSLE, BPF_REG_3, -3, -3),
|
||||||
|
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_3),
|
||||||
|
BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 0),
|
||||||
|
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||||
|
BPF_EXIT_INSN(),
|
||||||
|
},
|
||||||
|
.fixup_map2 = { 3 },
|
||||||
|
.result = REJECT,
|
||||||
|
.errstr = "R1 min value is negative",
|
||||||
|
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||||
|
},
|
||||||
{
|
{
|
||||||
"map element value is preserved across register spilling",
|
"map element value is preserved across register spilling",
|
||||||
.insns = {
|
.insns = {
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue