| { |
| "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, |
| }, |
