{
"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,
},
