mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-01-26 02:19:31 +07:00
23599ada0e
Add various tests to make sure the verifier keeps catching them: # ./test_verifier [...] #230/p pass ctx or null check, 1: ctx OK #231/p pass ctx or null check, 2: null OK #232/p pass ctx or null check, 3: 1 OK #233/p pass ctx or null check, 4: ctx - const OK #234/p pass ctx or null check, 5: null (connect) OK #235/p pass ctx or null check, 6: null (bind) OK #236/p pass ctx or null check, 7: ctx (bind) OK #237/p pass ctx or null check, 8: null (bind) OK [...] Summary: 1595 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/c74758d07b1b678036465ef7f068a49e9efd3548.1585323121.git.daniel@iogearbox.net
199 lines
5.1 KiB
C
199 lines
5.1 KiB
C
{
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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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{
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"pass ctx or null check, 1: ctx",
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.insns = {
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
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BPF_FUNC_get_netns_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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.prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR,
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.expected_attach_type = BPF_CGROUP_UDP6_SENDMSG,
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.result = ACCEPT,
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},
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{
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"pass ctx or null check, 2: null",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
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BPF_FUNC_get_netns_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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.prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR,
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.expected_attach_type = BPF_CGROUP_UDP6_SENDMSG,
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.result = ACCEPT,
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},
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{
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"pass ctx or null check, 3: 1",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_1, 1),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
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BPF_FUNC_get_netns_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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.prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR,
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.expected_attach_type = BPF_CGROUP_UDP6_SENDMSG,
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.result = REJECT,
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.errstr = "R1 type=inv expected=ctx",
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},
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{
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"pass ctx or null check, 4: ctx - const",
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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_netns_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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.prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR,
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.expected_attach_type = BPF_CGROUP_UDP6_SENDMSG,
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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 ctx or null check, 5: null (connect)",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
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BPF_FUNC_get_netns_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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.prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR,
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.expected_attach_type = BPF_CGROUP_INET4_CONNECT,
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.result = ACCEPT,
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},
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{
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"pass ctx or null check, 6: null (bind)",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
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BPF_FUNC_get_netns_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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.prog_type = BPF_PROG_TYPE_CGROUP_SOCK,
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.expected_attach_type = BPF_CGROUP_INET4_POST_BIND,
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.result = ACCEPT,
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},
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{
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"pass ctx or null check, 7: ctx (bind)",
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.insns = {
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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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.prog_type = BPF_PROG_TYPE_CGROUP_SOCK,
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.expected_attach_type = BPF_CGROUP_INET4_POST_BIND,
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.result = ACCEPT,
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},
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{
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"pass ctx or null check, 8: null (bind)",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_1, 0),
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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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.prog_type = BPF_PROG_TYPE_CGROUP_SOCK,
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.expected_attach_type = BPF_CGROUP_INET4_POST_BIND,
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.result = REJECT,
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.errstr = "R1 type=inv expected=ctx",
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},
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