| { |
| "ARG_PTR_TO_LONG uninitialized", |
| .insns = { |
| /* bpf_strtoul arg1 (buf) */ |
| BPF_MOV64_REG(BPF_REG_7, BPF_REG_10), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8), |
| BPF_MOV64_IMM(BPF_REG_0, 0x00303036), |
| BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0), |
| |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_7), |
| |
| /* bpf_strtoul arg2 (buf_len) */ |
| BPF_MOV64_IMM(BPF_REG_2, 4), |
| |
| /* bpf_strtoul arg3 (flags) */ |
| BPF_MOV64_IMM(BPF_REG_3, 0), |
| |
| /* bpf_strtoul arg4 (res) */ |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8), |
| BPF_MOV64_REG(BPF_REG_4, BPF_REG_7), |
| |
| /* bpf_strtoul() */ |
| BPF_EMIT_CALL(BPF_FUNC_strtoul), |
| |
| BPF_MOV64_IMM(BPF_REG_0, 1), |
| BPF_EXIT_INSN(), |
| }, |
| .result = REJECT, |
| .prog_type = BPF_PROG_TYPE_CGROUP_SYSCTL, |
| .errstr = "invalid indirect read from stack R4 off -16+0 size 8", |
| }, |
| { |
| "ARG_PTR_TO_LONG half-uninitialized", |
| .insns = { |
| /* bpf_strtoul arg1 (buf) */ |
| BPF_MOV64_REG(BPF_REG_7, BPF_REG_10), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8), |
| BPF_MOV64_IMM(BPF_REG_0, 0x00303036), |
| BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0), |
| |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_7), |
| |
| /* bpf_strtoul arg2 (buf_len) */ |
| BPF_MOV64_IMM(BPF_REG_2, 4), |
| |
| /* bpf_strtoul arg3 (flags) */ |
| BPF_MOV64_IMM(BPF_REG_3, 0), |
| |
| /* bpf_strtoul arg4 (res) */ |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8), |
| BPF_STX_MEM(BPF_W, BPF_REG_7, BPF_REG_0, 0), |
| BPF_MOV64_REG(BPF_REG_4, BPF_REG_7), |
| |
| /* bpf_strtoul() */ |
| BPF_EMIT_CALL(BPF_FUNC_strtoul), |
| |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .result_unpriv = REJECT, |
| .errstr_unpriv = "invalid indirect read from stack R4 off -16+4 size 8", |
| /* in privileged mode reads from uninitialized stack locations are permitted */ |
| .result = ACCEPT, |
| }, |
| { |
| "ARG_PTR_TO_LONG misaligned", |
| .insns = { |
| /* bpf_strtoul arg1 (buf) */ |
| BPF_MOV64_REG(BPF_REG_7, BPF_REG_10), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8), |
| BPF_MOV64_IMM(BPF_REG_0, 0x00303036), |
| BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0), |
| |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_7), |
| |
| /* bpf_strtoul arg2 (buf_len) */ |
| BPF_MOV64_IMM(BPF_REG_2, 4), |
| |
| /* bpf_strtoul arg3 (flags) */ |
| BPF_MOV64_IMM(BPF_REG_3, 0), |
| |
| /* bpf_strtoul arg4 (res) */ |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -12), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_STX_MEM(BPF_W, BPF_REG_7, BPF_REG_0, 0), |
| BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 4), |
| BPF_MOV64_REG(BPF_REG_4, BPF_REG_7), |
| |
| /* bpf_strtoul() */ |
| BPF_EMIT_CALL(BPF_FUNC_strtoul), |
| |
| BPF_MOV64_IMM(BPF_REG_0, 1), |
| BPF_EXIT_INSN(), |
| }, |
| .result = REJECT, |
| .prog_type = BPF_PROG_TYPE_CGROUP_SYSCTL, |
| .errstr = "misaligned stack access off (0x0; 0x0)+-20+0 size 8", |
| }, |
| { |
| "ARG_PTR_TO_LONG size < sizeof(long)", |
| .insns = { |
| /* bpf_strtoul arg1 (buf) */ |
| BPF_MOV64_REG(BPF_REG_7, BPF_REG_10), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -16), |
| BPF_MOV64_IMM(BPF_REG_0, 0x00303036), |
| BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0), |
| |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_7), |
| |
| /* bpf_strtoul arg2 (buf_len) */ |
| BPF_MOV64_IMM(BPF_REG_2, 4), |
| |
| /* bpf_strtoul arg3 (flags) */ |
| BPF_MOV64_IMM(BPF_REG_3, 0), |
| |
| /* bpf_strtoul arg4 (res) */ |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, 12), |
| BPF_STX_MEM(BPF_W, BPF_REG_7, BPF_REG_0, 0), |
| BPF_MOV64_REG(BPF_REG_4, BPF_REG_7), |
| |
| /* bpf_strtoul() */ |
| BPF_EMIT_CALL(BPF_FUNC_strtoul), |
| |
| BPF_MOV64_IMM(BPF_REG_0, 1), |
| BPF_EXIT_INSN(), |
| }, |
| .result = REJECT, |
| .prog_type = BPF_PROG_TYPE_CGROUP_SYSCTL, |
| .errstr = "invalid indirect access to stack R4 off=-4 size=8", |
| }, |
| { |
| "ARG_PTR_TO_LONG initialized", |
| .insns = { |
| /* bpf_strtoul arg1 (buf) */ |
| BPF_MOV64_REG(BPF_REG_7, BPF_REG_10), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8), |
| BPF_MOV64_IMM(BPF_REG_0, 0x00303036), |
| BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0), |
| |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_7), |
| |
| /* bpf_strtoul arg2 (buf_len) */ |
| BPF_MOV64_IMM(BPF_REG_2, 4), |
| |
| /* bpf_strtoul arg3 (flags) */ |
| BPF_MOV64_IMM(BPF_REG_3, 0), |
| |
| /* bpf_strtoul arg4 (res) */ |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8), |
| BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0), |
| BPF_MOV64_REG(BPF_REG_4, BPF_REG_7), |
| |
| /* bpf_strtoul() */ |
| BPF_EMIT_CALL(BPF_FUNC_strtoul), |
| |
| BPF_MOV64_IMM(BPF_REG_0, 1), |
| BPF_EXIT_INSN(), |
| }, |
| .result = ACCEPT, |
| .prog_type = BPF_PROG_TYPE_CGROUP_SYSCTL, |
| }, |
