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| {
| "leak pointer into ctx 1",
| .insns = {
| BPF_MOV64_IMM(BPF_REG_0, 0),
| BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
| offsetof(struct __sk_buff, cb[0])),
| BPF_LD_MAP_FD(BPF_REG_2, 0),
| BPF_STX_XADD(BPF_DW, BPF_REG_1, BPF_REG_2,
| offsetof(struct __sk_buff, cb[0])),
| BPF_EXIT_INSN(),
| },
| .fixup_map_hash_8b = { 2 },
| .errstr_unpriv = "R2 leaks addr into mem",
| .result_unpriv = REJECT,
| .result = REJECT,
| .errstr = "BPF_XADD stores into R1 ctx is not allowed",
| },
| {
| "leak pointer into ctx 2",
| .insns = {
| BPF_MOV64_IMM(BPF_REG_0, 0),
| BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
| offsetof(struct __sk_buff, cb[0])),
| BPF_STX_XADD(BPF_DW, BPF_REG_1, BPF_REG_10,
| offsetof(struct __sk_buff, cb[0])),
| BPF_EXIT_INSN(),
| },
| .errstr_unpriv = "R10 leaks addr into mem",
| .result_unpriv = REJECT,
| .result = REJECT,
| .errstr = "BPF_XADD stores into R1 ctx is not allowed",
| },
| {
| "leak pointer into ctx 3",
| .insns = {
| BPF_MOV64_IMM(BPF_REG_0, 0),
| BPF_LD_MAP_FD(BPF_REG_2, 0),
| BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_2,
| offsetof(struct __sk_buff, cb[0])),
| BPF_EXIT_INSN(),
| },
| .fixup_map_hash_8b = { 1 },
| .errstr_unpriv = "R2 leaks addr into ctx",
| .result_unpriv = REJECT,
| .result = ACCEPT,
| },
| {
| "leak pointer into map val",
| .insns = {
| BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
| 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_map_lookup_elem),
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 3),
| BPF_MOV64_IMM(BPF_REG_3, 0),
| BPF_STX_MEM(BPF_DW, BPF_REG_0, BPF_REG_3, 0),
| BPF_STX_XADD(BPF_DW, BPF_REG_0, BPF_REG_6, 0),
| BPF_MOV64_IMM(BPF_REG_0, 0),
| BPF_EXIT_INSN(),
| },
| .fixup_map_hash_8b = { 4 },
| .errstr_unpriv = "R6 leaks addr into mem",
| .result_unpriv = REJECT,
| .result = ACCEPT,
| },
|
|
