| { | |
| "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, | |
| }, |